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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] XenMon Patch
Attached is the second release of XenMon, which is a unique performance monitoring tool for Xen. Instead of using hypervisor calls to get domain information, we use the xentrace facility to provide fine-grained monitoring of various metrics (see README below). We have written up a small case study that demonstrates the usefulness of the tool and the metrics that it reports. This will be available next week as HP Labs Report No. HPL-2005-187, and I've attached the PDF here also. Diwaker Gupta <diwaker.gupta@xxxxxx> Rob Gardner <rob.gardner@xxxxxx> Lucy Cherkasova <lucy.cherkasova.hp.com>This is the README file for XenMon, which can also be found in the tools/xenmon directory: Xen Performance Monitor -----------------------The xenmon tools make use of the existing xen tracing feature to provide fine grained reporting of various domain related metrics. It should be stressed that the xenmon.py script included here is just an example of the data that may be displayed. The xenbake demon keeps a large amount of history in a shared memory area that may be accessed by tools such as xenmon.For each domain, xenmon reports various metrics. One part of the display is a group of metrics that have been accumulated over the last second, while another part of the display shows data measured over 10 seconds. Other measurement intervals are possible, but we have just chosen 1s and 10s as an example. Execution Count ---------------o The number of times that a domain was scheduled to run (ie, dispatched) over the measurement interval CPU usage --------- o Total time used over the measurement interval o Usage expressed as a percentage of the measurement interval o Average cpu time used during each execution of the domain Waiting time ------------This is how much time the domain spent waiting to run, or put another way, the amount of time the domain spent in the "runnable" state (or on the run queue) but not actually running. Xenmon displays: o Total time waiting over the measurement interval o Wait time expressed as a percentage of the measurement interval o Average waiting time for each execution of the domain Blocked time ------------This is how much time the domain spent blocked (or sleeping); Put another way, the amount of time the domain spent not needing/wanting the cpu because it was waiting for some event (ie, I/O). Xenmon reports: o Total time blocked over the measurement interval o Blocked time expressed as a percentage of the measurement interval o Blocked time per I/O (see I/O count below) Allocation time ---------------This is how much cpu time was allocated to the domain by the scheduler; This is distinct from cpu usage since the "time slice" given to a domain is frequently cut short for one reason or another, ie, the domain requests I/O and blocks. Xenmon reports: o Average allocation time per execution (ie, time slice) o Min and Max allocation times I/O Count --------- This is a rough measure of I/O requested by the domain. The number of page exchanges (or page "flips") between the domain and dom0 are counted. The number of pages exchanged may not accurately reflect the number of bytes transferred to/from a domain due to partial pages being used by the network protocols, etc. But it does give a good sense of the magnitude of I/O being requested by a domain. Xenmon reports: o Total number of page exchanges during the measurement interval o Average number of page exchanges per execution of the domain Usage Notes and issues ----------------------- Start xenmon by simply running xenmon.py; The xenbake demon is started and stopped automatically by xenmon. - To see the various options for xenmon, run xenmon -h. Ditto for xenbaked.- xenmon also has an option (-n) to output log data to a file instead of the curses interface. - NDOMAINS is defined to be 32, but can be changed by recompiling xenbaked - Xenmon.py appears to create 1-2% cpu overhead; Part of this is just the overhead of the python interpreter. Part of it may be the number of trace records being generated. The number of trace records generated can be limited by setting the trace mask (with a dom0 Op), which controls which events cause a trace record to be emitted. - To exit xenmon, type 'q' - To cycle the display to other physical cpu's, type 'c' Future Work -----------o RPC interface to allow external entities to programmatically access processed data o I/O Count batching to reduce number of trace records generated Authors ------- Diwaker Gupta <diwaker.gupta@xxxxxx> Rob Gardner <rob.gardner@xxxxxx> Lucy Cherkasova <lucy.cherkasova.hp.com> Attachment:
HPL-2005-187.pdf # HG changeset patch
# User root@xxxxxxxxxxxxxxxxx
# Node ID 5f59c79658a27ee3af9c845512868e7af1db6af9
# Parent 10c93f58b041b129351b33854fa7f46a7527a026
Changes for XenMon, which include slight modifications to the
xen trace code to add sequence numbers and several new trace events;
And the tools/xenmon directory which contains the xenbaked and xenmon
source. rob.gardner@xxxxxx
diff -r 10c93f58b041 -r 5f59c79658a2 tools/Makefile
--- a/tools/Makefile Thu Oct 13 14:19:29 2005
+++ b/tools/Makefile Thu Oct 20 16:30:16 2005
@@ -4,6 +4,7 @@
SUBDIRS :=
SUBDIRS += libxc
SUBDIRS += xenstore
+SUBDIRS += xenmon
SUBDIRS += misc
SUBDIRS += examples
SUBDIRS += xentrace
diff -r 10c93f58b041 -r 5f59c79658a2 xen/Rules.mk
--- a/xen/Rules.mk Thu Oct 13 14:19:29 2005
+++ b/xen/Rules.mk Thu Oct 20 16:30:16 2005
@@ -6,7 +6,7 @@
debug ?= n
perfc ?= n
perfc_arrays?= n
-trace ?= n
+trace ?= y
domu_debug ?= n
crash_debug ?= n
diff -r 10c93f58b041 -r 5f59c79658a2 xen/common/grant_table.c
--- a/xen/common/grant_table.c Thu Oct 13 14:19:29 2005
+++ b/xen/common/grant_table.c Thu Oct 20 16:30:16 2005
@@ -29,6 +29,7 @@
#include <xen/shadow.h>
#include <xen/mm.h>
#include <acm/acm_hooks.h>
+#include <xen/trace.h>
#if defined(CONFIG_X86_64)
#define GRANT_PTE_FLAGS (_PAGE_PRESENT|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
@@ -379,6 +380,8 @@
}
}
+ TRACE_1D(TRC_MEM_PAGE_FLIP, dom);
+
ld->grant_table->maptrack[handle].domid = dom;
ld->grant_table->maptrack[handle].ref_and_flags =
(ref << MAPTRACK_REF_SHIFT) |
@@ -462,6 +465,8 @@
(void)__put_user(GNTST_bad_domain, &uop->status);
return GNTST_bad_domain;
}
+
+ TRACE_1D(TRC_MEM_PAGE_FLIP, dom);
act = &rd->grant_table->active[ref];
sha = &rd->grant_table->shared[ref];
diff -r 10c93f58b041 -r 5f59c79658a2 xen/common/schedule.c
--- a/xen/common/schedule.c Thu Oct 13 14:19:29 2005
+++ b/xen/common/schedule.c Thu Oct 20 16:30:16 2005
@@ -398,6 +398,9 @@
prev->cpu_time += now - prev->lastschd;
+ TRACE_2D(TRC_SCHED_SWITCH_INFPREV,
+ prev->domain->domain_id, (unsigned long)(now - prev->lastschd));
+
/* get policy-specific decision on scheduling... */
next_slice = ops.do_schedule(now);
@@ -413,13 +416,26 @@
if ( unlikely(prev == next) )
{
spin_unlock_irq(&schedule_data[cpu].schedule_lock);
+ TRACE_3D(TRC_SCHED_SWITCH_INFNEXT,
+ next->domain->domain_id, 0, r_time);
return continue_running(prev);
+ }
+ else {
+ TRACE_3D(TRC_SCHED_SWITCH_INFNEXT,
+ next->domain->domain_id, (unsigned long)(now -
next->wokenup), r_time);
}
clear_bit(_VCPUF_running, &prev->vcpu_flags);
set_bit(_VCPUF_running, &next->vcpu_flags);
perfc_incrc(sched_ctx);
+
+ prev->lastdeschd = now;
+ /* What if this domain never goes to sleep? Then it never enters
domain_wake() and
+ * stays on the run queue. So the next time enter_scheduler is called, it
uses a wrong
+ * value of wokenup. It is safe to assign wokenup to NOW() here. If we do
go
+ * to sleep, it will be overwritten in domain_wake() */
+ prev->wokenup = NOW();
#if defined(WAKE_HISTO)
if ( !is_idle_task(next->domain) && next->wokenup )
@@ -431,7 +447,6 @@
}
next->wokenup = (s_time_t)0;
#elif defined(BLOCKTIME_HISTO)
- prev->lastdeschd = now;
if ( !is_idle_task(next->domain) )
{
ulong diff = (ulong)((now - next->lastdeschd) / MILLISECS(10));
diff -r 10c93f58b041 -r 5f59c79658a2 xen/common/trace.c
--- a/xen/common/trace.c Thu Oct 13 14:19:29 2005
+++ b/xen/common/trace.c Thu Oct 20 16:30:16 2005
@@ -31,7 +31,7 @@
#include <public/dom0_ops.h>
/* opt_tbuf_size: trace buffer size (in pages) */
-static unsigned int opt_tbuf_size = 10;
+static unsigned int opt_tbuf_size = 30;
integer_param("tbuf_size", opt_tbuf_size);
/* Pointers to the meta-data objects for all system trace buffers */
@@ -45,6 +45,11 @@
/* which tracing events are enabled */
u32 tb_event_mask = TRC_ALL;
+
+/* sequence number for trace records */
+u32 tb_seq = 0;
+
+
/**
* init_trace_bufs - performs initialisation of the per-cpu trace buffers.
*
diff -r 10c93f58b041 -r 5f59c79658a2 xen/include/public/trace.h
--- a/xen/include/public/trace.h Thu Oct 13 14:19:29 2005
+++ b/xen/include/public/trace.h Thu Oct 20 16:30:16 2005
@@ -14,6 +14,7 @@
#define TRC_SCHED 0x0002f000 /* Xen Scheduler trace */
#define TRC_DOM0OP 0x0004f000 /* Xen DOM0 operation trace */
#define TRC_VMX 0x0008f000 /* Xen VMX trace */
+#define TRC_MEM 0x000af000 /* Xen memory trace */
#define TRC_ALL 0xfffff000
/* Trace subclasses */
@@ -40,6 +41,13 @@
#define TRC_SCHED_S_TIMER_FN (TRC_SCHED + 11)
#define TRC_SCHED_T_TIMER_FN (TRC_SCHED + 12)
#define TRC_SCHED_DOM_TIMER_FN (TRC_SCHED + 13)
+#define TRC_SCHED_BVT_INFO (TRC_SCHED + 14)
+#define TRC_SCHED_SWITCH_INFPREV (TRC_SCHED + 15)
+#define TRC_SCHED_SWITCH_INFNEXT (TRC_SCHED + 16)
+
+#define TRC_DOM0OP_DOM0WORK (TRC_DOM0OP + 1)
+
+#define TRC_MEM_PAGE_FLIP (TRC_MEM + 1)
/* trace events per subclass */
#define TRC_VMX_VMEXIT (TRC_VMXEXIT + 1)
@@ -57,6 +65,7 @@
struct t_rec {
uint64_t cycles; /* cycle counter timestamp */
uint32_t event; /* event ID */
+ uint32_t seqno; /* sequence number */
unsigned long data[5]; /* event data items */
};
diff -r 10c93f58b041 -r 5f59c79658a2 xen/include/xen/trace.h
--- a/xen/include/xen/trace.h Thu Oct 13 14:19:29 2005
+++ b/xen/include/xen/trace.h Thu Oct 20 16:30:16 2005
@@ -38,6 +38,7 @@
extern int tb_init_done;
extern unsigned long tb_cpu_mask;
extern u32 tb_event_mask;
+extern u32 tb_seq;
/* Used to initialise trace buffer functionality */
void init_trace_bufs(void);
@@ -93,6 +94,7 @@
rec = &buf->rec[_atomic_read(old)];
rdtscll(rec->cycles);
+ rec->seqno = tb_seq++;
rec->event = event;
rec->data[0] = d1;
rec->data[1] = d2;
diff -r 10c93f58b041 -r 5f59c79658a2 tools/xenmon/COPYING
--- /dev/null Thu Oct 13 14:19:29 2005
+++ b/tools/xenmon/COPYING Thu Oct 20 16:30:16 2005
@@ -0,0 +1,340 @@
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+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff -r 10c93f58b041 -r 5f59c79658a2 tools/xenmon/Makefile
--- /dev/null Thu Oct 13 14:19:29 2005
+++ b/tools/xenmon/Makefile Thu Oct 20 16:30:16 2005
@@ -0,0 +1,50 @@
+# Copyright (C) HP Labs, Palo Alto and Fort Collins, 2005
+# Author: Diwaker Gupta <diwaker.gupta@xxxxxx>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; under version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+INSTALL = install
+INSTALL_PROG = $(INSTALL) -m0755
+INSTALL_DIR = $(INSTALL) -d -m0755
+INSTALL_DATA = $(INSTALL) -m064
+
+prefix=/usr/local
+mandir=$(prefix)/share/man
+man1dir=$(mandir)/man1
+sbindir=$(prefix)/sbin
+
+XEN_ROOT=../..
+include $(XEN_ROOT)/tools/Rules.mk
+
+CFLAGS += -Wall -Werror -g
+CFLAGS += -I $(XEN_XC)
+CFLAGS += -I $(XEN_LIBXC)
+LDFLAGS += -L $(XEN_LIBXC)
+
+BIN = setmask xenbaked
+SCRIPTS = xenmon.py
+
+all: build
+
+build: $(BIN)
+
+install: xenbaked setmask
+ $(INSTALL_PROG) xenbaked $(DESTDIR)$(sbindir)/xenbaked
+ $(INSTALL_PROG) setmask $(DESTDIR)$(sbindir)/setmask
+ $(INSTALL_PROG) xenmon.py $(DESTDIR)$(sbindir)/xenmon.py
+
+clean:
+ rm -f $(BIN)
+
+
+%: %.c Makefile
+ $(CC) $(CFLAGS) $(LDFLAGS) -lxenctrl -o $@ $<
+
+
diff -r 10c93f58b041 -r 5f59c79658a2 tools/xenmon/README
--- /dev/null Thu Oct 13 14:19:29 2005
+++ b/tools/xenmon/README Thu Oct 20 16:30:16 2005
@@ -0,0 +1,99 @@
+Xen Performance Monitor
+-----------------------
+
+The xenmon tools make use of the existing xen tracing feature to provide fine
+grained reporting of various domain related metrics. It should be stressed that
+the xenmon.py script included here is just an example of the data that may be
+displayed. The xenbake demon keeps a large amount of history in a shared memory
+area that may be accessed by tools such as xenmon.
+
+For each domain, xenmon reports various metrics. One part of the display is a
+group of metrics that have been accumulated over the last second, while another
+part of the display shows data measured over 10 seconds. Other measurement
+intervals are possible, but we have just chosen 1s and 10s as an example.
+
+
+Execution Count
+---------------
+ o The number of times that a domain was scheduled to run (ie, dispatched) over
+ the measurement interval
+
+
+CPU usage
+---------
+ o Total time used over the measurement interval
+ o Usage expressed as a percentage of the measurement interval
+ o Average cpu time used during each execution of the domain
+
+
+Waiting time
+------------
+This is how much time the domain spent waiting to run, or put another way, the
+amount of time the domain spent in the "runnable" state (or on the run queue)
+but not actually running. Xenmon displays:
+
+ o Total time waiting over the measurement interval
+ o Wait time expressed as a percentage of the measurement interval
+ o Average waiting time for each execution of the domain
+
+Blocked time
+------------
+This is how much time the domain spent blocked (or sleeping); Put another way,
+the amount of time the domain spent not needing/wanting the cpu because it was
+waiting for some event (ie, I/O). Xenmon reports:
+
+ o Total time blocked over the measurement interval
+ o Blocked time expressed as a percentage of the measurement interval
+ o Blocked time per I/O (see I/O count below)
+
+Allocation time
+---------------
+This is how much cpu time was allocated to the domain by the scheduler; This is
+distinct from cpu usage since the "time slice" given to a domain is frequently
+cut short for one reason or another, ie, the domain requests I/O and blocks.
+Xenmon reports:
+
+ o Average allocation time per execution (ie, time slice)
+ o Min and Max allocation times
+
+I/O Count
+---------
+This is a rough measure of I/O requested by the domain. The number of page
+exchanges (or page "flips") between the domain and dom0 are counted. The
+number of pages exchanged may not accurately reflect the number of bytes
+transferred to/from a domain due to partial pages being used by the network
+protocols, etc. But it does give a good sense of the magnitude of I/O being
+requested by a domain. Xenmon reports:
+
+ o Total number of page exchanges during the measurement interval
+ o Average number of page exchanges per execution of the domain
+
+
+Usage Notes and issues
+----------------------
+ - Start xenmon by simply running xenmon.py; The xenbake demon is started and
+ stopped automatically by xenmon.
+ - To see the various options for xenmon, run xenmon -h. Ditto for xenbaked.
+ - xenmon also has an option (-n) to output log data to a file instead of the
+ curses interface.
+ - NDOMAINS is defined to be 32, but can be changed by recompiling xenbaked
+ - Xenmon.py appears to create 1-2% cpu overhead; Part of this is just the
+ overhead of the python interpreter. Part of it may be the number of trace
+ records being generated. The number of trace records generated can be
+ limited by setting the trace mask (with a dom0 Op), which controls which
+ events cause a trace record to be emitted.
+ - To exit xenmon, type 'q'
+ - To cycle the display to other physical cpu's, type 'c'
+
+Future Work
+-----------
+o RPC interface to allow external entities to programmatically access
processed data
+o I/O Count batching to reduce number of trace records generated
+
+Case Study
+----------
+We have written a case study which demonstrates some of the usefulness of
+this tool and the metrics reported. It is available at:
+http://www.hpl.hp.com/personal/Lucy_Cherkasova/papers/xenmon-case-study.pdf
+
+
+Authors
+-------
+Diwaker Gupta <diwaker.gupta@xxxxxx>
+Rob Gardner <rob.gardner@xxxxxx>
+Lucy Cherkasova <lucy.cherkasova.hp.com>
+
diff -r 10c93f58b041 -r 5f59c79658a2 tools/xenmon/setmask.c
--- /dev/null Thu Oct 13 14:19:29 2005
+++ b/tools/xenmon/setmask.c Thu Oct 20 16:30:16 2005
@@ -0,0 +1,90 @@
+/******************************************************************************
+ * tools/xenmon/setmask.c
+ *
+ * Simple utility for getting/setting the event mask
+ *
+ * Copyright (C) 2005 by Hewlett-Packard, Palo Alto and Fort Collins
+ *
+ * Authors: Lucy Cherkasova, lucy.cherkasova.hp.com
+ * Rob Gardner, rob.gardner@xxxxxx
+ * Diwaker Gupta, diwaker.gupta@xxxxxx
+ * Date: August, 2005
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <getopt.h>
+#include <xenctrl.h>
+#include <xen/xen.h>
+typedef struct { int counter; } atomic_t;
+#include <xen/trace.h>
+
+#define XENMON (TRC_SCHED_DOM_ADD | TRC_SCHED_DOM_REM |
TRC_SCHED_SWITCH_INFPREV | TRC_SCHED_SWITCH_INFNEXT | TRC_SCHED_BLOCK |
TRC_SCHED_SLEEP | TRC_SCHED_WAKE | TRC_MEM_PAGE_FLIP)
+
+int main(int argc, char * argv[])
+{
+
+ dom0_op_t op;
+ int ret;
+
+ int xc_handle = xc_interface_open();
+ op.cmd = DOM0_TBUFCONTROL;
+ op.interface_version = DOM0_INTERFACE_VERSION;
+ op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
+ ret = xc_dom0_op(xc_handle, &op);
+ if ( ret != 0 )
+ {
+ perror("Failure to get event mask from Xen");
+ exit(1);
+ }
+ else
+ {
+ printf("Current event mask: 0x%.8x\n", op.u.tbufcontrol.evt_mask);
+ }
+
+ op.cmd = DOM0_TBUFCONTROL;
+ op.interface_version = DOM0_INTERFACE_VERSION;
+ op.u.tbufcontrol.op = DOM0_TBUF_SET_EVT_MASK;
+ op.u.tbufcontrol.evt_mask = XENMON;
+
+ ret = xc_dom0_op(xc_handle, &op);
+ printf("Setting mask to 0x%.8x\n", op.u.tbufcontrol.evt_mask);
+ if ( ret != 0 )
+ {
+ perror("Failure to get scheduler ID from Xen");
+ exit(1);
+ }
+
+ op.cmd = DOM0_TBUFCONTROL;
+ op.interface_version = DOM0_INTERFACE_VERSION;
+ op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
+ ret = xc_dom0_op(xc_handle, &op);
+ if ( ret != 0 )
+ {
+ perror("Failure to get event mask from Xen");
+ exit(1);
+ }
+ else
+ {
+ printf("Current event mask: 0x%.8x\n", op.u.tbufcontrol.evt_mask);
+ }
+ xc_interface_close(xc_handle);
+ return 0;
+}
diff -r 10c93f58b041 -r 5f59c79658a2 tools/xenmon/xenbaked.c
--- /dev/null Thu Oct 13 14:19:29 2005
+++ b/tools/xenmon/xenbaked.c Thu Oct 20 16:30:16 2005
@@ -0,0 +1,1090 @@
+/******************************************************************************
+ * tools/xenbaked.c
+ *
+ * Tool for collecting raw trace buffer data from Xen and
+ * performing some accumulation operations and other processing
+ * on it.
+ *
+ * Copyright (C) 2004 by Intel Research Cambridge
+ * Copyright (C) 2005 by Hewlett Packard, Palo Alto and Fort Collins
+ *
+ * Authors: Diwaker Gupta, diwaker.gupta@xxxxxx
+ * Rob Gardner, rob.gardner@xxxxxx
+ * Lucy Cherkasova, lucy.cherkasova.hp.com
+ * Much code based on xentrace, authored by Mark Williamson,
mark.a.williamson@xxxxxxxxx
+ * Date: October, 2005
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <time.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <argp.h>
+#include <signal.h>
+#include <xenctrl.h>
+#include <xen/xen.h>
+#include <string.h>
+
+typedef struct { int counter; } atomic_t;
+#define _atomic_read(v) ((v).counter)
+
+#include <xen/trace.h>
+#include "xenbaked.h"
+
+extern FILE *stderr;
+
+/***** Compile time configuration of defaults ********************************/
+
+/* when we've got more records than this waiting, we log it to the output */
+#define NEW_DATA_THRESH 1
+
+/* sleep for this long (milliseconds) between checking the trace buffers */
+#define POLL_SLEEP_MILLIS 100
+
+/* Size of time period represented by each sample */
+#define MS_PER_SAMPLE 100
+
+/* CPU Frequency */
+#define MHZ
+#define CPU_FREQ 2660 MHZ
+
+/***** The code **************************************************************/
+
+typedef struct settings_st {
+ char *outfile;
+ struct timespec poll_sleep;
+ unsigned long new_data_thresh;
+ unsigned long ms_per_sample;
+ double cpu_freq;
+} settings_t;
+
+settings_t opts;
+
+int interrupted = 0; /* gets set if we get a SIGHUP */
+long seq_ok = 0;
+long seq_bad = 0;
+long timewarps = 0;
+int rec_count = 0;
+time_t start_time;
+int dom0_flips = 0;
+
+_new_qos_data *new_qos;
+_new_qos_data **cpu_qos_data;
+
+
+#define ID(X) ((X>NDOMAINS-1)?(NDOMAINS-1):X)
+
+// array of currently running domains, indexed by cpu
+int *running = NULL;
+
+// number of cpu's on this platform
+int NCPU = 0;
+
+
+void init_current(int ncpu)
+{
+ running = calloc(ncpu, sizeof(int));
+ NCPU = ncpu;
+ printf("Initialized with %d cpu's\n", ncpu);
+}
+
+int is_current(int domain, int cpu)
+{
+ // int i;
+
+ // for (i=0; i<NCPU; i++)
+ if (running[cpu] == domain)
+ return 1;
+ return 0;
+}
+
+
+// return the domain that's currently running on the given cpu
+int current(int cpu)
+{
+ return running[cpu];
+}
+
+void set_current(int cpu, int domain)
+{
+ running[cpu] = domain;
+}
+
+
+
+void close_handler(int signal)
+{
+ interrupted = 1;
+}
+
+void dump_record(int cpu, struct t_rec *x)
+{
+ printf("record: cpu=%x, tsc=%llx, event=%x, d1=%lx\n",
+ cpu, x->cycles, x->event, x->data[0]);
+}
+
+
+/**
+ * millis_to_timespec - convert a time in milliseconds to a struct timespec
+ * @millis: time interval in milliseconds
+ */
+struct timespec millis_to_timespec(unsigned long millis)
+{
+ struct timespec spec;
+
+ spec.tv_sec = millis / 1000;
+ spec.tv_nsec = (millis % 1000) * 1000;
+
+ return spec;
+}
+
+
+typedef struct
+{
+ int event_count;
+ int event_id;
+ char *text;
+} stat_map_t;
+
+stat_map_t stat_map[] = {
+ { 0, 0, "Other" },
+ { 0, TRC_SCHED_DOM_ADD, "Add Domain" },
+ { 0, TRC_SCHED_DOM_REM, "Remove Domain" },
+ { 0, TRC_SCHED_SLEEP, "Sleep" },
+ { 0, TRC_SCHED_WAKE, "Wake" },
+ { 0, TRC_SCHED_BLOCK, "Block" },
+ { 0, TRC_SCHED_SWITCH, "Switch" },
+ { 0, TRC_SCHED_S_TIMER_FN, "Timer Func"},
+ { 0, TRC_SCHED_SWITCH_INFPREV, "Switch Prev" },
+ { 0, TRC_SCHED_SWITCH_INFNEXT, "Switch Next" },
+ { 0, TRC_MEM_PAGE_FLIP, "Page Exchange" },
+ { 0, TRC_SCHED_BVT_INFO, "BVT Info"},
+ { 0, 0, 0 }
+};
+
+
+void check_gotten_sum(void)
+{
+#if 0
+ uint64_t sum, ns;
+ extern uint64_t total_ns_gotten(uint64_t*);
+ double percent;
+ int i;
+
+ for (i=0; i<NCPU; i++) {
+ new_qos = cpu_qos_data[i];
+ ns = billion;
+ sum = total_ns_gotten(&ns);
+
+ printf("[cpu%d] ns_gotten over all domains = %lldns, over %lldns\n",
+ i, sum, ns);
+ percent = (double) sum;
+ percent = (100.0*percent) / (double)ns;
+ printf(" ==> ns_gotten = %7.3f%%\n", percent);
+ }
+#endif
+}
+
+
+
+void dump_stats(void)
+{
+ stat_map_t *smt = stat_map;
+ time_t end_time, run_time;
+
+ time(&end_time);
+
+ run_time = end_time - start_time;
+
+ printf("Event counts:\n");
+ while (smt->text != NULL) {
+ printf("%08d\t%s\n", smt->event_count, smt->text);
+ smt++;
+ }
+ // printf("records in sequence: %ld \n", seq_ok);
+ // printf("records out of seq: %ld \n", seq_bad);
+ // printf("time warps: %ld\n", timewarps);
+
+ printf("processed %d total records in %d seconds (%ld per second)\n",
+ rec_count, (int)run_time, rec_count/run_time);
+
+ check_gotten_sum();
+}
+
+void log_event(int event_id)
+{
+ stat_map_t *smt = stat_map;
+
+ // printf("event_id = 0x%x\n", event_id);
+
+ while (smt->text != NULL) {
+ if (smt->event_id == event_id) {
+ smt->event_count++;
+ return;
+ }
+ smt++;
+ }
+ if (smt->text == NULL)
+ stat_map[0].event_count++; // other
+}
+
+
+/**
+ * get_tbufs - get pointer to and size of the trace buffers
+ * @mach_addr: location to store machine address if the trace buffers to
+ * @size: location to store the size of a trace buffer to
+ *
+ * Gets the machine address of the trace pointer area and the size of the
+ * per CPU buffers.
+ */
+void get_tbufs(unsigned long *mfn, unsigned long *size)
+{
+ int ret;
+ dom0_op_t op; /* dom0 op we'll build */
+ int xc_handle = xc_interface_open(); /* for accessing control interface */
+
+ op.cmd = DOM0_TBUFCONTROL;
+ op.interface_version = DOM0_INTERFACE_VERSION;
+ op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
+
+ ret = xc_dom0_op(xc_handle, &op);
+
+ xc_interface_close(xc_handle);
+
+ if ( ret != 0 )
+ {
+ perror("Failure to get trace buffer pointer from Xen");
+ exit(EXIT_FAILURE);
+ }
+
+ *mfn = op.u.tbufcontrol.buffer_mfn;
+ *size = op.u.tbufcontrol.size;
+}
+
+/**
+ * map_tbufs - memory map Xen trace buffers into user space
+ * @tbufs: machine address of the trace buffers
+ * @num: number of trace buffers to map
+ * @size: size of each trace buffer
+ *
+ * Maps the Xen trace buffers them into process address space.
+ */
+struct t_buf *map_tbufs(unsigned long tbufs_mfn, unsigned int num,
+ unsigned long size)
+{
+ int xc_handle; /* file descriptor for /proc/xen/privcmd */
+ struct t_buf *tbufs_mapped;
+
+ xc_handle = xc_interface_open();
+
+ if ( xc_handle < 0 )
+ {
+ perror("Open /proc/xen/privcmd when mapping trace buffers\n");
+ exit(EXIT_FAILURE);
+ }
+
+ tbufs_mapped = xc_map_foreign_range(xc_handle, 0 /* Dom 0 ID */,
+ size * num, PROT_READ,
+ tbufs_mfn);
+
+ xc_interface_close(xc_handle);
+
+ if ( tbufs_mapped == 0 )
+ {
+ perror("Failed to mmap trace buffers");
+ exit(EXIT_FAILURE);
+ }
+
+ return tbufs_mapped;
+}
+
+
+/**
+ * init_bufs_ptrs - initialises an array of pointers to the trace buffers
+ * @bufs_mapped: the userspace address where the trace buffers are mapped
+ * @num: number of trace buffers
+ * @size: trace buffer size
+ *
+ * Initialises an array of pointers to individual trace buffers within the
+ * mapped region containing all trace buffers.
+ */
+struct t_buf **init_bufs_ptrs(void *bufs_mapped, unsigned int num,
+ unsigned long size)
+{
+ int i;
+ struct t_buf **user_ptrs;
+
+ user_ptrs = (struct t_buf **)calloc(num, sizeof(struct t_buf *));
+ if ( user_ptrs == NULL )
+ {
+ perror( "Failed to allocate memory for buffer pointers\n");
+ exit(EXIT_FAILURE);
+ }
+
+ /* initialise pointers to the trace buffers - given the size of a trace
+ * buffer and the value of bufs_maped, we can easily calculate these */
+ for ( i = 0; i<num; i++ )
+ user_ptrs[i] = (struct t_buf *)((unsigned long)bufs_mapped + size * i);
+
+ return user_ptrs;
+}
+
+
+/**
+ * init_rec_ptrs - initialises data area pointers to locations in user space
+ * @tbufs_mfn: machine base address of the trace buffer area
+ * @tbufs_mapped: user virtual address of base of trace buffer area
+ * @meta: array of user-space pointers to struct t_buf's of metadata
+ * @num: number of trace buffers
+ *
+ * Initialises data area pointers to the locations that data areas have been
+ * mapped in user space. Note that the trace buffer metadata contains machine
+ * pointers - the array returned allows more convenient access to them.
+ */
+struct t_rec **init_rec_ptrs(unsigned long tbufs_mfn,
+ struct t_buf *tbufs_mapped,
+ struct t_buf **meta,
+ unsigned int num)
+{
+ int i;
+ struct t_rec **data;
+
+ data = calloc(num, sizeof(struct t_rec *));
+ if ( data == NULL )
+ {
+ perror("Failed to allocate memory for data pointers\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for ( i = 0; i < num; i++ )
+ data[i] = (struct t_rec *)(meta[i]->rec_addr - (tbufs_mfn <<
XC_PAGE_SHIFT)
+ + (unsigned long)tbufs_mapped);
+
+ return data;
+}
+
+/**
+ * init_tail_idxs - initialise an array of tail indexes
+ * @bufs: array of pointers to trace buffer metadata
+ * @num: number of trace buffers
+ *
+ * The tail indexes indicate where we're read to so far in the data array of a
+ * trace buffer. Each entry in this table corresponds to the tail index for a
+ * particular trace buffer.
+ */
+unsigned long *init_tail_idxs(struct t_buf **bufs, unsigned int num)
+{
+ int i;
+ unsigned long *tails = calloc(num, sizeof(unsigned int));
+
+ if ( tails == NULL )
+ {
+ perror("Failed to allocate memory for tail pointers\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for ( i = 0; i<num; i++ )
+ tails[i] = _atomic_read(bufs[i]->rec_idx);
+
+ return tails;
+}
+
+/**
+ * get_num_cpus - get the number of logical CPUs
+ */
+unsigned int get_num_cpus()
+{
+ dom0_op_t op;
+ int xc_handle = xc_interface_open();
+ int ret;
+
+ op.cmd = DOM0_PHYSINFO;
+ op.interface_version = DOM0_INTERFACE_VERSION;
+
+ ret = xc_dom0_op(xc_handle, &op);
+
+ if ( ret != 0 )
+ {
+ perror("Failure to get logical CPU count from Xen");
+ exit(EXIT_FAILURE);
+ }
+
+ xc_interface_close(xc_handle);
+ opts.cpu_freq = (double)op.u.physinfo.cpu_khz/1000.0;
+
+ return (op.u.physinfo.threads_per_core *
+ op.u.physinfo.cores_per_socket *
+ op.u.physinfo.sockets_per_node *
+ op.u.physinfo.nr_nodes);
+}
+
+
+/**
+ * monitor_tbufs - monitor the contents of tbufs
+ */
+int monitor_tbufs()
+{
+ int i;
+ extern void process_record(int, struct t_rec *);
+ extern void alloc_qos_data(int ncpu);
+
+ void *tbufs_mapped; /* pointer to where the tbufs are mapped */
+ struct t_buf **meta; /* pointers to the trace buffer metadata */
+ struct t_rec **data; /* pointers to the trace buffer data areas
+ * where they are mapped into user space. */
+ unsigned long *cons; /* store tail indexes for the trace buffers */
+ unsigned long tbufs_mfn; /* mfn of the tbufs */
+ unsigned int num; /* number of trace buffers / logical CPUS */
+ unsigned long size; /* size of a single trace buffer */
+
+ int size_in_recs;
+
+ /* get number of logical CPUs (and therefore number of trace buffers) */
+ num = get_num_cpus();
+
+ init_current(num);
+ alloc_qos_data(num);
+
+ printf("CPU Frequency = %7.2f\n", opts.cpu_freq);
+
+ /* setup access to trace buffers */
+ get_tbufs(&tbufs_mfn, &size);
+
+ // printf("from dom0op: %ld, t_buf: %d, t_rec: %d\n",
+ // size, sizeof(struct t_buf), sizeof(struct t_rec));
+
+ tbufs_mapped = map_tbufs(tbufs_mfn, num, size);
+
+ size_in_recs = (size - sizeof(struct t_buf)) / sizeof(struct t_rec);
+ // fprintf(stderr, "size_in_recs = %d\n", size_in_recs);
+
+ /* build arrays of convenience ptrs */
+ meta = init_bufs_ptrs (tbufs_mapped, num, size);
+ data = init_rec_ptrs (tbufs_mfn, tbufs_mapped, meta, num);
+ cons = init_tail_idxs (meta, num);
+
+ /* now, scan buffers for events */
+ while ( !interrupted )
+ {
+ for ( i = 0; ( i < num ) && !interrupted; i++ )
+ while( cons[i] != _atomic_read(meta[i]->rec_idx) )
+ {
+ // write_rec(i, data[i] + cons[i], logfile);
+ process_record(i, data[i] + cons[i]);
+ cons[i] = (cons[i] + 1) % size_in_recs;
+ }
+
+ nanosleep(&opts.poll_sleep, NULL);
+ }
+
+ /* cleanup */
+ free(meta);
+ free(data);
+ free(cons);
+ /* don't need to munmap - cleanup is automatic */
+
+ return 0;
+}
+
+
+/******************************************************************************
+ * Various declarations / definitions GNU argp needs to do its work
+ *****************************************************************************/
+
+
+/* command parser for GNU argp - see GNU docs for more info */
+error_t cmd_parser(int key, char *arg, struct argp_state *state)
+{
+ settings_t *setup = (settings_t *)state->input;
+
+ switch ( key )
+ {
+ case 't': /* set new records threshold for logging */
+ {
+ char *inval;
+ setup->new_data_thresh = strtol(arg, &inval, 0);
+ if ( inval == arg )
+ argp_usage(state);
+ }
+ break;
+
+ case 's': /* set sleep time (given in milliseconds) */
+ {
+ char *inval;
+ setup->poll_sleep = millis_to_timespec(strtol(arg, &inval, 0));
+ if ( inval == arg )
+ argp_usage(state);
+ }
+ break;
+
+ case 'm': /* set ms_per_sample */
+ {
+ char *inval;
+ setup->ms_per_sample = strtol(arg, &inval, 0);
+ if ( inval == arg )
+ argp_usage(state);
+ }
+ break;
+
+ case ARGP_KEY_ARG:
+ {
+ if ( state->arg_num == 0 )
+ setup->outfile = arg;
+ else
+ argp_usage(state);
+ }
+ break;
+
+ default:
+ return ARGP_ERR_UNKNOWN;
+ }
+
+ return 0;
+}
+
+#define SHARED_MEM_FILE "/tmp/xenq-shm"
+void alloc_qos_data(int ncpu)
+{
+ int i, n, pgsize, off=0;
+ char *dummy;
+ int qos_fd;
+ void advance_next_datapoint(uint64_t);
+
+ cpu_qos_data = (_new_qos_data **) calloc(ncpu, sizeof(_new_qos_data *));
+
+
+ qos_fd = open(SHARED_MEM_FILE, O_RDWR|O_CREAT|O_TRUNC, 0777);
+ if (qos_fd < 0) {
+ perror(SHARED_MEM_FILE);
+ exit(2);
+ }
+ pgsize = getpagesize();
+ dummy = malloc(pgsize);
+
+ for (n=0; n<ncpu; n++) {
+
+ for (i=0; i<sizeof(_new_qos_data); i=i+pgsize)
+ write(qos_fd, dummy, pgsize);
+
+ new_qos = (_new_qos_data *) mmap(0, sizeof(_new_qos_data),
PROT_READ|PROT_WRITE,
+ MAP_SHARED, qos_fd, off);
+ off += i;
+ if (new_qos == NULL) {
+ perror("mmap");
+ exit(3);
+ }
+ // printf("new_qos = %p\n", new_qos);
+ memset(new_qos, 0, sizeof(_new_qos_data));
+ new_qos->next_datapoint = 0;
+ advance_next_datapoint(0);
+ new_qos->structlen = i;
+ new_qos->ncpu = ncpu;
+ // printf("structlen = 0x%x\n", i);
+ cpu_qos_data[n] = new_qos;
+ }
+ free(dummy);
+ new_qos = NULL;
+}
+
+
+#define xstr(x) str(x)
+#define str(x) #x
+
+const struct argp_option cmd_opts[] =
+{
+ { .name = "log-thresh", .key='t', .arg="l",
+ .doc =
+ "Set number, l, of new records required to trigger a write to
output "
+ "(default " xstr(NEW_DATA_THRESH) ")." },
+
+ { .name = "poll-sleep", .key='s', .arg="p",
+ .doc =
+ "Set sleep time, p, in milliseconds between polling the trace
buffer "
+ "for new data (default " xstr(POLL_SLEEP_MILLIS) ")." },
+
+ { .name = "ms_per_sample", .key='m', .arg="MS",
+ .doc =
+ "Specify the number of milliseconds per sample "
+ " (default " xstr(MS_PER_SAMPLE) ")." },
+
+ {0}
+};
+
+const struct argp parser_def =
+{
+ .options = cmd_opts,
+ .parser = cmd_parser,
+ // .args_doc = "[output file]",
+ .doc =
+ "Tool to capture and partially process Xen trace buffer data"
+ "\v"
+ "This tool is used to capture trace buffer data from Xen. The data is
"
+ "saved in a shared memory structure to be further processed by xenmon."
+};
+
+
+const char *argp_program_version = "xenbaked v1.1";
+const char *argp_program_bug_address = "<rob.gardner@xxxxxx>";
+
+
+int main(int argc, char **argv)
+{
+ int ret;
+ struct sigaction act;
+
+ time(&start_time);
+ opts.outfile = 0;
+ opts.poll_sleep = millis_to_timespec(POLL_SLEEP_MILLIS);
+ opts.new_data_thresh = NEW_DATA_THRESH;
+ opts.ms_per_sample = MS_PER_SAMPLE;
+ opts.cpu_freq = CPU_FREQ;
+
+ argp_parse(&parser_def, argc, argv, 0, 0, &opts);
+ fprintf(stderr, "ms_per_sample = %ld\n", opts.ms_per_sample);
+
+
+ /* ensure that if we get a signal, we'll do cleanup, then exit */
+ act.sa_handler = close_handler;
+ act.sa_flags = 0;
+ sigemptyset(&act.sa_mask);
+ sigaction(SIGHUP, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+ sigaction(SIGINT, &act, NULL);
+
+ ret = monitor_tbufs();
+
+ dump_stats();
+ msync(new_qos, sizeof(_new_qos_data), MS_SYNC);
+
+ return ret;
+}
+
+int domain_runnable(int domid)
+{
+ return new_qos->domain_info[ID(domid)].runnable;
+}
+
+
+void update_blocked_time(int domid, uint64_t now)
+{
+ uint64_t t_blocked;
+ int id = ID(domid);
+
+ if (new_qos->domain_info[id].blocked_start_time != 0) {
+ if (now >= new_qos->domain_info[id].blocked_start_time)
+ t_blocked = now - new_qos->domain_info[id].blocked_start_time;
+ else
+ t_blocked = now + (~0ULL -
new_qos->domain_info[id].blocked_start_time);
+ new_qos->qdata[new_qos->next_datapoint].ns_blocked[id] += t_blocked;
+ }
+
+ if (domain_runnable(id))
+ new_qos->domain_info[id].blocked_start_time = 0;
+ else
+ new_qos->domain_info[id].blocked_start_time = now;
+}
+
+
+// advance to next datapoint for all domains
+void advance_next_datapoint(uint64_t now)
+{
+ int new, old, didx;
+
+ old = new_qos->next_datapoint;
+ new = QOS_INCR(old);
+ new_qos->next_datapoint = new;
+ // memset(&new_qos->qdata[new], 0, sizeof(uint64_t)*(2+5*NDOMAINS));
+ for (didx = 0; didx < NDOMAINS; didx++) {
+ new_qos->qdata[new].ns_gotten[didx] = 0;
+ new_qos->qdata[new].ns_allocated[didx] = 0;
+ new_qos->qdata[new].ns_waiting[didx] = 0;
+ new_qos->qdata[new].ns_blocked[didx] = 0;
+ new_qos->qdata[new].switchin_count[didx] = 0;
+ new_qos->qdata[new].io_count[didx] = 0;
+ }
+ new_qos->qdata[new].ns_passed = 0;
+ new_qos->qdata[new].lost_records = 0;
+ new_qos->qdata[new].flip_free_periods = 0;
+
+ new_qos->qdata[new].timestamp = now;
+}
+
+
+
+void qos_update_thread(int cpu, int domid, uint64_t now)
+{
+ int n, id;
+ uint64_t last_update_time, start;
+ int64_t time_since_update, run_time = 0;
+
+ id = ID(domid);
+
+ n = new_qos->next_datapoint;
+ last_update_time = new_qos->domain_info[id].last_update_time;
+
+ time_since_update = now - last_update_time;
+
+ if (time_since_update < 0) {
+ // what happened here? either a timestamp wraparound, or more likely,
+ // a slight inconsistency among timestamps from various cpu's
+ if (-time_since_update < billion) {
+ // fairly small difference, let's just adjust 'now' to be a little
+ // beyond last_update_time
+ time_since_update = -time_since_update;
+ }
+ else if ( ((~0ULL - last_update_time) < billion) && (now < billion) ) {
+ // difference is huge, must be a wraparound
+ // last_update time should be "near" ~0ULL,
+ // and now should be "near" 0
+ time_since_update = now + (~0ULL - last_update_time);
+ printf("time wraparound\n");
+ }
+ else {
+ // none of the above, may be an out of order record
+ // no good solution, just ignore and update again later
+ return;
+ }
+ }
+
+ new_qos->domain_info[id].last_update_time = now;
+
+ if (new_qos->domain_info[id].runnable_at_last_update && is_current(domid,
cpu)) {
+ start = new_qos->domain_info[id].start_time;
+ if (start > now) { // wrapped around
+ run_time = now + (~0ULL - start);
+ printf("warning: start > now\n");
+ }
+ else
+ run_time = now - start;
+ if (run_time < 0) // should not happen
+ printf("warning: run_time < 0; start = %lld now= %lld\n", start, now);
+ new_qos->domain_info[id].ns_oncpu_since_boot += run_time;
+ new_qos->domain_info[id].start_time = now;
+ new_qos->domain_info[id].ns_since_boot += time_since_update;
+#if 1
+ new_qos->qdata[n].ns_gotten[id] += run_time;
+ if (domid == 0 && cpu == 1)
+ printf("adding run time for dom0 on cpu1\r\n");
+#endif
+ }
+
+ new_qos->domain_info[id].runnable_at_last_update = domain_runnable(domid);
+
+ update_blocked_time(domid, now);
+
+ // how much time passed since this datapoint was updated?
+ if (now >= new_qos->qdata[n].timestamp) {
+ // all is right with the world, time is increasing
+ new_qos->qdata[n].ns_passed += (now - new_qos->qdata[n].timestamp);
+ }
+ else {
+ // time wrapped around
+ //new_qos->qdata[n].ns_passed += (now + (~0LL -
new_qos->qdata[n].timestamp));
+ // printf("why timewrap?\r\n");
+ }
+ new_qos->qdata[n].timestamp = now;
+}
+
+
+// called by dump routines to update all structures
+void qos_update_all(uint64_t now, int cpu)
+{
+ int i;
+
+ for (i=0; i<NDOMAINS; i++)
+ if (new_qos->domain_info[i].in_use)
+ qos_update_thread(cpu, i, now);
+}
+
+
+void qos_update_thread_stats(int cpu, int domid, uint64_t now)
+{
+ if (new_qos->qdata[new_qos->next_datapoint].ns_passed >
(million*opts.ms_per_sample)) {
+ qos_update_all(now, cpu);
+ advance_next_datapoint(now);
+ return;
+ }
+ qos_update_thread(cpu, domid, now);
+}
+
+
+void qos_init_domain(int cpu, int domid, uint64_t now)
+{
+ int i, id;
+
+ id = ID(domid);
+
+ if (new_qos->domain_info[id].in_use)
+ return;
+
+
+ memset(&new_qos->domain_info[id], 0, sizeof(_domain_info));
+ new_qos->domain_info[id].last_update_time = now;
+ // runnable_start_time[id] = 0;
+ new_qos->domain_info[id].runnable_start_time = 0; // invalidate
+ new_qos->domain_info[id].in_use = 1;
+ new_qos->domain_info[id].blocked_start_time = 0;
+ new_qos->domain_info[id].id = id;
+ if (domid == IDLE_DOMAIN_ID)
+ sprintf(new_qos->domain_info[id].name, "Idle Task%d", cpu);
+ else
+ sprintf(new_qos->domain_info[id].name, "Domain#%d", domid);
+
+ for (i=0; i<NSAMPLES; i++) {
+ new_qos->qdata[i].ns_gotten[id] = 0;
+ new_qos->qdata[i].ns_allocated[id] = 0;
+ new_qos->qdata[i].ns_waiting[id] = 0;
+ new_qos->qdata[i].ns_blocked[id] = 0;
+ new_qos->qdata[i].switchin_count[id] = 0;
+ new_qos->qdata[i].io_count[id] = 0;
+ }
+}
+
+
+// called when a new thread gets the cpu
+void qos_switch_in(int cpu, int domid, uint64_t now, unsigned long ns_alloc,
unsigned long ns_waited)
+{
+ int id = ID(domid);
+
+ new_qos->domain_info[id].runnable = 1;
+ update_blocked_time(domid, now);
+ new_qos->domain_info[id].blocked_start_time = 0; // invalidate
+ new_qos->domain_info[id].runnable_start_time = 0; // invalidate
+ //runnable_start_time[id] = 0;
+
+ new_qos->domain_info[id].start_time = now;
+ new_qos->qdata[new_qos->next_datapoint].switchin_count[id]++;
+ new_qos->qdata[new_qos->next_datapoint].ns_allocated[id] += ns_alloc;
+ new_qos->qdata[new_qos->next_datapoint].ns_waiting[id] += ns_waited;
+ qos_update_thread_stats(cpu, domid, now);
+ set_current(cpu, id);
+
+ // count up page flips for dom0 execution
+ if (id == 0)
+ dom0_flips = 0;
+}
+
+// called when the current thread is taken off the cpu
+void qos_switch_out(int cpu, int domid, uint64_t now, unsigned long gotten)
+{
+ int id = ID(domid);
+ int n;
+
+ if (!is_current(id, cpu)) {
+ // printf("switching out domain %d but it is not current.
gotten=%ld\r\n", id, gotten);
+ }
+
+ if (gotten == 0) {
+ printf("gotten==0 in qos_switchout(domid=%d)\n", domid);
+ }
+
+ if (gotten < 1000) {
+ printf("gotten<1000ns in qos_switchout(domid=%d)\n", domid);
+ }
+
+
+ n = new_qos->next_datapoint;
+#if 0
+ new_qos->qdata[n].ns_gotten[id] += gotten;
+ if (gotten > new_qos->qdata[n].ns_passed)
+ printf("inconsistency #257, diff = %lld\n",
+ gotten - new_qos->qdata[n].ns_passed );
+#endif
+ new_qos->domain_info[id].ns_oncpu_since_boot += gotten;
+ new_qos->domain_info[id].runnable_start_time = now;
+ // runnable_start_time[id] = now;
+ qos_update_thread_stats(cpu, id, now);
+
+ // process dom0 page flips
+ if (id == 0)
+ if (dom0_flips == 0)
+ new_qos->qdata[n].flip_free_periods++;
+}
+
+// called when domain is put to sleep, may also be called
+// when thread is already asleep
+void qos_state_sleeping(int cpu, int domid, uint64_t now)
+{
+ int id = ID(domid);
+
+ if (!domain_runnable(id)) // double call?
+ return;
+
+ new_qos->domain_info[id].runnable = 0;
+ new_qos->domain_info[id].blocked_start_time = now;
+ new_qos->domain_info[id].runnable_start_time = 0; // invalidate
+ // runnable_start_time[id] = 0; // invalidate
+ qos_update_thread_stats(cpu, domid, now);
+}
+
+
+
+void qos_kill_thread(int domid)
+{
+ new_qos->domain_info[ID(domid)].in_use = 0;
+}
+
+
+// called when thread becomes runnable, may also be called
+// when thread is already runnable
+void qos_state_runnable(int cpu, int domid, uint64_t now)
+{
+ int id = ID(domid);
+
+ if (domain_runnable(id)) // double call?
+ return;
+ new_qos->domain_info[id].runnable = 1;
+ update_blocked_time(domid, now);
+
+ qos_update_thread_stats(cpu, domid, now);
+
+ new_qos->domain_info[id].blocked_start_time = 0; /* invalidate */
+ new_qos->domain_info[id].runnable_start_time = now;
+ // runnable_start_time[id] = now;
+}
+
+
+void qos_count_packets(domid_t domid, uint64_t now)
+{
+ int id = ID(domid);
+
+ if (new_qos->domain_info[id].in_use) {
+ new_qos->qdata[new_qos->next_datapoint].io_count[id]++;
+ }
+ new_qos->qdata[new_qos->next_datapoint].io_count[0]++;
+ dom0_flips++;
+}
+
+
+int domain_ok(int cpu, int domid, uint64_t now)
+{
+ if (domid == IDLE_DOMAIN_ID)
+ domid = NDOMAINS-1;
+ if (domid < 0 || domid >= NDOMAINS) {
+ printf("bad domain id: %d\n", domid);
+ return 0;
+ }
+ if (new_qos->domain_info[domid].in_use == 0)
+ qos_init_domain(cpu, domid, now);
+ return 1;
+}
+
+void check_sequence(int cpu, struct t_rec *r)
+{
+ // this code needs work for smp
+#if 0
+ static uint32_t last_seq = 0;
+ static uint32_t max_seq = 0;
+ static int last_cpu = 0;
+ static int init_done = 0;
+
+ if (!init_done) {
+ init_done = 1;
+ last_seq = r->seqno - 1;
+ max_seq = last_seq;
+ }
+
+ if (r->seqno > (max_seq + 1)) {
+ new_qos->qdata[new_qos->next_datapoint].lost_records += r->seqno - max_seq;
+ printf("last seq: %x, this seq: %x, max_seq: %x\n", last_seq, r->seqno,
max_seq);
+ }
+
+ if ( (r->seqno < last_seq) && (cpu == last_cpu))
+ printf("last seq: %x, this seq: %x\n", last_seq, r->seqno);
+
+
+ last_cpu = 0;
+ last_seq = r->seqno;
+ if (last_seq > max_seq)
+ max_seq = last_seq;
+#endif
+}
+
+
+void process_record(int cpu, struct t_rec *r)
+{
+ uint64_t now;
+
+
+ new_qos = cpu_qos_data[cpu];
+
+ check_sequence(cpu, r);
+
+ rec_count++;
+
+ now = ((double)r->cycles) / (opts.cpu_freq / 1000.0);
+
+ log_event(r->event);
+
+ switch (r->event) {
+
+ case TRC_SCHED_SWITCH_INFPREV:
+ // domain data[0] just switched out and received data[1] ns of cpu time
+ if (domain_ok(cpu, r->data[0], now))
+ qos_switch_out(cpu, r->data[0], now, r->data[1]);
+ // printf("ns_gotten %ld\n", r->data[1]);
+ break;
+
+ case TRC_SCHED_SWITCH_INFNEXT:
+ // domain data[0] just switched in and
+ // waited data[1] ns, and was allocated data[2] ns of cpu time
+ if (domain_ok(cpu, r->data[0], now))
+ qos_switch_in(cpu, r->data[0], now, r->data[2], r->data[1]);
+ break;
+
+ case TRC_SCHED_DOM_ADD:
+ if (domain_ok(cpu, r->data[0], now))
+ qos_init_domain(cpu, r->data[0], now);
+ break;
+
+ case TRC_SCHED_DOM_REM:
+ if (domain_ok(cpu, r->data[0], now))
+ qos_kill_thread(r->data[0]);
+ break;
+
+ case TRC_SCHED_SLEEP:
+ if (domain_ok(cpu, r->data[0], now))
+ qos_state_sleeping(cpu, r->data[0], now);
+ break;
+
+ case TRC_SCHED_WAKE:
+ if (domain_ok(cpu, r->data[0], now))
+ qos_state_runnable(cpu, r->data[0], now);
+ break;
+
+ case TRC_SCHED_BLOCK:
+ if (domain_ok(cpu, r->data[0], now))
+ qos_state_sleeping(cpu, r->data[0], now);
+ break;
+
+ case TRC_MEM_PAGE_FLIP:
+ if (domain_ok(cpu, r->data[0], now))
+ qos_count_packets(r->data[0], now);
+ break;
+
+ default:
+ break;
+ }
+ new_qos = NULL;
+}
+
+
+
diff -r 10c93f58b041 -r 5f59c79658a2 tools/xenmon/xenbaked.h
--- /dev/null Thu Oct 13 14:19:29 2005
+++ b/tools/xenmon/xenbaked.h Thu Oct 20 16:30:16 2005
@@ -0,0 +1,101 @@
+/******************************************************************************
+ * tools/xenbaked.h
+ *
+ * Header file for xenbaked
+ *
+ * Copyright (C) 2005 by Hewlett Packard, Palo Alto and Fort Collins
+ *
+ * Authors: Diwaker Gupta, diwaker.gupta@xxxxxx
+ * Rob Gardner, rob.gardner@xxxxxx
+ * Lucy Cherkasova, lucy.cherkasova.hp.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __QOS_H__
+#define __QOS_H__
+
+///// qos stuff
+#define million 1000000LL
+#define billion 1000000000LL
+
+#define QOS_ADD(N,A) ((N+A)<(NSAMPLES-1) ? (N+A) : A)
+#define QOS_INCR(N) ((N<(NSAMPLES-2)) ? (N+1) : 0)
+#define QOS_DECR(N) ((N==0) ? (NSAMPLES-1) : (N-1))
+
+#define MAX_NAME_SIZE 32
+#define IDLE_DOMAIN_ID 32767
+
+/* Number of domains we can keep track of in memory */
+#define NDOMAINS 32
+
+/* Number of data points to keep */
+#define NSAMPLES 100
+
+
+// per domain stuff
+typedef struct
+{
+ uint64_t last_update_time;
+ uint64_t start_time; // when the thread started running
+ uint64_t runnable_start_time; // when the thread became runnable
+ uint64_t blocked_start_time; // when the thread became blocked
+ uint64_t ns_since_boot; // time gone by since boot
+ uint64_t ns_oncpu_since_boot; // total cpu time used by thread since
boot
+ // uint64_t ns_runnable_since_boot;
+ int runnable_at_last_update; // true if the thread was runnable last time we
checked.
+ int runnable; // true if thread is runnable right now
+ // tells us something about what happened during the
+ // sample period that we are analysing right now
+ int in_use; //
+ domid_t id;
+ char name[MAX_NAME_SIZE];
+} _domain_info;
+
+
+
+typedef struct
+{
+ struct
+ {
+// data point:
+// stuff that is recorded once for each measurement interval
+ uint64_t ns_gotten[NDOMAINS]; // ns used in the last sample
period
+ uint64_t ns_allocated[NDOMAINS]; // ns allocated by scheduler
+ uint64_t ns_waiting[NDOMAINS]; // ns spent waiting to execute,
ie, time from
+ // becoming runnable until actually
running
+ uint64_t ns_blocked[NDOMAINS]; // ns spent blocked
+ uint64_t switchin_count[NDOMAINS]; // number of executions of the domain
+ uint64_t io_count[NDOMAINS];
+ uint64_t ns_passed; // ns gone by on the wall clock, ie, the
sample period
+ uint64_t timestamp;
+ uint64_t lost_records; // # of lost trace records this time
period
+ uint64_t flip_free_periods; // # of executions of dom0 in which no
page flips happened
+ } qdata[NSAMPLES];
+
+ _domain_info domain_info[NDOMAINS];
+
+ // control information
+ int next_datapoint;
+ int ncpu;
+ int structlen;
+
+ // parameters
+ int measurement_frequency; // for example
+
+} _new_qos_data;
+
+
+
+#endif
diff -r 10c93f58b041 -r 5f59c79658a2 tools/xenmon/xenmon.py
--- /dev/null Thu Oct 13 14:19:29 2005
+++ b/tools/xenmon/xenmon.py Thu Oct 20 16:30:16 2005
@@ -0,0 +1,578 @@
+#!/usr/bin/env python
+
+#####################################################################
+# xenmon is a front-end for xenbaked.
+# There is a curses interface for live monitoring. XenMon also allows
+# logging to a file. For options, run python xenmon.py -h
+#
+# Copyright (C) 2005 by Hewlett Packard, Palo Alto and Fort Collins
+# Authors: Lucy Cherkasova, lucy.cherkasova@xxxxxx
+# Rob Gardner, rob.gardner@xxxxxx
+# Diwaker Gupta, diwaker.gupta@xxxxxx
+#####################################################################
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; under version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#####################################################################
+
+import mmap
+import struct
+import os
+import time
+import optparse as _o
+import curses as _c
+import math
+import sys
+
+# constants
+NSAMPLES = 100
+NDOMAINS = 32
+
+# the struct strings for qos_info
+ST_DOM_INFO = "6Q4i32s"
+ST_QDATA = "%dQ" % (6*NDOMAINS + 4)
+
+# size of mmaped file
+QOS_DATA_SIZE = struct.calcsize(ST_QDATA)*NSAMPLES +
struct.calcsize(ST_DOM_INFO)*NDOMAINS + struct.calcsize("4i")
+
+# location of mmaped file, hard coded right now
+SHM_FILE = "/tmp/xenq-shm"
+
+# format strings
+TOTALS = 15*' ' + "%6.2f%%" + 35*' ' + "%6.2f%%"
+
+ALLOCATED = "Allocated"
+GOTTEN = "Gotten"
+BLOCKED = "Blocked"
+WAITED = "Waited"
+IOCOUNT = "I/O Count"
+EXCOUNT = "Exec Count"
+
+# globals
+# our curses screen
+stdscr = None
+
+# parsed options
+options, args = None, None
+
+# the optparse module is quite smart
+# to see help, just run xenmon -h
+def setup_cmdline_parser():
+ parser = _o.OptionParser()
+ parser.add_option("-l", "--live", dest="live", action="store_true",
+ default=True, help = "show the ncurses live monitoring
frontend (default)")
+ parser.add_option("-n", "--notlive", dest="live", action="store_false",
+ default="True", help = "write to file instead of live
monitoring")
+ parser.add_option("-p", "--prefix", dest="prefix",
+ default = "log", help="prefix to use for output files")
+ parser.add_option("-t", "--time", dest="duration",
+ action="store", type="int", default=10,
+ help="stop logging to file after this much time has elapsed (in
seconds). set to 0 to keep logging indefinitely")
+ parser.add_option("-i", "--interval", dest="interval",
+ action="store", type="int", default=1000,
+ help="interval for logging (in ms)")
+ parser.add_option("--ms_per_sample", dest="mspersample",
+ action="store", type="int", default=100,
+ help = "determines how many ms worth of data goes in a sample")
+ return parser
+
+# encapsulate information about a domain
+class DomainInfo:
+ def __init__(self):
+ self.allocated_samples = []
+ self.gotten_samples = []
+ self.blocked_samples = []
+ self.waited_samples = []
+ self.execcount_samples = []
+ self.iocount_samples = []
+ self.ffp_samples = []
+
+ def gotten_stats(self, passed):
+ total = float(sum(self.gotten_samples))
+ per = 100*total/passed
+ exs = sum(self.execcount_samples)
+ if exs > 0:
+ avg = total/exs
+ else:
+ avg = 0
+ return [total/(float(passed)/10**9), per, avg]
+
+ def waited_stats(self, passed):
+ total = float(sum(self.waited_samples))
+ per = 100*total/passed
+ exs = sum(self.execcount_samples)
+ if exs > 0:
+ avg = total/exs
+ else:
+ avg = 0
+ return [total/(float(passed)/10**9), per, avg]
+
+ def blocked_stats(self, passed):
+ total = float(sum(self.blocked_samples))
+ per = 100*total/passed
+ ios = sum(self.iocount_samples)
+ if ios > 0:
+ avg = total/float(ios)
+ else:
+ avg = 0
+ return [total/(float(passed)/10**9), per, avg]
+
+ def allocated_stats(self, passed):
+ total = sum(self.allocated_samples)
+ exs = sum(self.execcount_samples)
+ if exs > 0:
+ return float(total)/exs
+ else:
+ return 0
+
+ def ec_stats(self, passed):
+ total = float(sum(self.execcount_samples))/(float(passed)/10**9)
+ return total
+
+ def io_stats(self, passed):
+ total = float(sum(self.iocount_samples))
+ exs = sum(self.execcount_samples)
+ if exs > 0:
+ avg = total/exs
+ else:
+ avg = 0
+ return [total/(float(passed)/10**9), avg]
+
+ def stats(self, passed):
+ return [self.gotten_stats(passed), self.allocated_stats(passed),
self.blocked_stats(passed),
+ self.waited_stats(passed), self.ec_stats(passed),
self.io_stats(passed)]
+
+# report values over desired interval
+def summarize(startat, endat, duration, samples):
+ dominfos = {}
+ for i in range(0, NDOMAINS):
+ dominfos[i] = DomainInfo()
+
+ passed = 1 # to prevent zero division
+ curid = startat
+ numbuckets = 0
+ lost_samples = []
+ ffp_samples = []
+
+ while passed < duration:
+ for i in range(0, NDOMAINS):
+ dominfos[i].gotten_samples.append(samples[curid][0*NDOMAINS + i])
+ dominfos[i].allocated_samples.append(samples[curid][1*NDOMAINS +
i])
+ dominfos[i].waited_samples.append(samples[curid][2*NDOMAINS + i])
+ dominfos[i].blocked_samples.append(samples[curid][3*NDOMAINS + i])
+ dominfos[i].execcount_samples.append(samples[curid][4*NDOMAINS +
i])
+ dominfos[i].iocount_samples.append(samples[curid][5*NDOMAINS + i])
+
+ passed += samples[curid][6*NDOMAINS]
+ lost_samples.append(samples[curid][6*NDOMAINS + 2])
+ ffp_samples.append(samples[curid][6*NDOMAINS + 3])
+
+ numbuckets += 1
+
+ if curid > 0:
+ curid -= 1
+ else:
+ curid = NSAMPLES - 1
+ if curid == endat:
+ break
+
+ lostinfo = [min(lost_samples), sum(lost_samples), max(lost_samples)]
+ ffpinfo = [min(ffp_samples), sum(ffp_samples), max(ffp_samples)]
+ ldoms = map(lambda x: dominfos[x].stats(passed), range(0, NDOMAINS))
+
+ return [ldoms, lostinfo, ffpinfo]
+
+# scale microseconds to milliseconds or seconds as necessary
+def time_scale(ns):
+ if ns < 1000:
+ return "%4.2f ns" % float(ns)
+ elif ns < 1000*1000:
+ return "%4.2f us" % (float(ns)/10**3)
+ elif ns < 10**9:
+ return "%4.2f ms" % (float(ns)/10**6)
+ else:
+ return "%4.2f s" % (float(ns)/10**9)
+
+# paint message on curses screen, but detect screen size errors
+def display(scr, row, col, str, attr=0):
+ try:
+ scr.addstr(row, col, str, attr)
+ except:
+ scr.erase()
+ _c.nocbreak()
+ scr.keypad(0)
+ _c.echo()
+ _c.endwin()
+ print "Your terminal screen is not big enough; Please resize it."
+ print "row=%d, col=%d, str='%s'" % (row, col, str)
+ sys.exit(1)
+
+
+# the live monitoring code
+def show_livestats():
+ cpu = 0 # cpu of interest to display data for
+ ncpu = 1 # number of cpu's on this platform
+ slen = 0 # size of shared data structure, incuding padding
+
+ # mmap the (the first chunk of the) file
+ shmf = open(SHM_FILE, "r+")
+ shm = mmap.mmap(shmf.fileno(), QOS_DATA_SIZE)
+
+ samples = []
+ doms = []
+
+ # initialize curses
+ stdscr = _c.initscr()
+ _c.noecho()
+ _c.cbreak()
+
+ stdscr.keypad(1)
+ stdscr.timeout(1000)
+ [maxy, maxx] = stdscr.getmaxyx()
+
+
+
+ # display in a loop
+ while True:
+
+ for cpuidx in range(0, ncpu):
+
+ # calculate offset in mmap file to start from
+ idx = cpuidx * slen
+
+
+ samples = []
+ doms = []
+
+ # read in data
+ for i in range(0, NSAMPLES):
+ len = struct.calcsize(ST_QDATA)
+ sample = struct.unpack(ST_QDATA, shm[idx:idx+len])
+ samples.append(sample)
+ idx += len
+
+ for i in range(0, NDOMAINS):
+ len = struct.calcsize(ST_DOM_INFO)
+ dom = struct.unpack(ST_DOM_INFO, shm[idx:idx+len])
+ doms.append(dom)
+ idx += len
+
+ len = struct.calcsize("4i")
+ oldncpu = ncpu
+ (next, ncpu, slen, freq) = struct.unpack("4i", shm[idx:idx+len])
+ idx += len
+
+ # xenbaked tells us how many cpu's it's got, so re-do
+ # the mmap if necessary to get multiple cpu data
+ if oldncpu != ncpu:
+ shm = mmap.mmap(shmf.fileno(), ncpu*slen)
+
+ # if we've just calculated data for the cpu of interest, then
+ # stop examining mmap data and start displaying stuff
+ if cpuidx == cpu:
+ break
+
+ # calculate starting and ending datapoints; never look at "next" since
+ # it represents live data that may be in transition.
+ startat = next - 1
+ if next + 10 < NSAMPLES:
+ endat = next + 10
+ else:
+ endat = 10
+
+ # get summary over desired interval
+ [h1, l1, f1] = summarize(startat, endat, 10**9, samples)
+ [h2, l2, f2] = summarize(startat, endat, 10 * 10**9, samples)
+
+ # the actual display code
+ row = 0
+ display(stdscr, row, 1, "CPU = %d" % cpu, _c.A_STANDOUT)
+
+ display(stdscr, row, 10, "%sLast 10 seconds%sLast 1 second" % (6*' ',
30*' '), _c.A_BOLD)
+ row +=1
+ display(stdscr, row, 1, "%s" % ((maxx-2)*'='))
+
+ total_h1_cpu = 0
+ total_h2_cpu = 0
+
+ for dom in range(0, NDOMAINS):
+ if h1[dom][0][1] > 0 or dom == NDOMAINS - 1:
+ # display gotten
+ row += 1
+ col = 2
+ display(stdscr, row, col, "%d" % dom)
+ col += 4
+ display(stdscr, row, col, "%s" % time_scale(h2[dom][0][0]))
+ col += 12
+ display(stdscr, row, col, "%3.2f%%" % h2[dom][0][1])
+ col += 12
+ display(stdscr, row, col, "%s/ex" % time_scale(h2[dom][0][2]))
+ col += 18
+ display(stdscr, row, col, "%s" % time_scale(h1[dom][0][0]))
+ col += 12
+ display(stdscr, row, col, "%3.2f%%" % h1[dom][0][1])
+ col += 12
+ display(stdscr, row, col, "%s/ex" % time_scale(h1[dom][0][2]))
+ col += 18
+ display(stdscr, row, col, "Gotten")
+
+ # display allocated
+ row += 1
+ col = 2
+ display(stdscr, row, col, "%d" % dom)
+ col += 28
+ display(stdscr, row, col, "%s/ex" % time_scale(h2[dom][1]))
+ col += 42
+ display(stdscr, row, col, "%s/ex" % time_scale(h1[dom][1]))
+ col += 18
+ display(stdscr, row, col, "Allocated")
+
+ # display blocked
+ row += 1
+ col = 2
+ display(stdscr, row, col, "%d" % dom)
+ col += 4
+ display(stdscr, row, col, "%s" % time_scale(h2[dom][2][0]))
+ col += 12
+ display(stdscr, row, col, "%3.2f%%" % h2[dom][2][1])
+ col += 12
+ display(stdscr, row, col, "%s/io" % time_scale(h2[dom][2][2]))
+ col += 18
+ display(stdscr, row, col, "%s" % time_scale(h1[dom][2][0]))
+ col += 12
+ display(stdscr, row, col, "%3.2f%%" % h1[dom][2][1])
+ col += 12
+ display(stdscr, row, col, "%s/io" % time_scale(h1[dom][2][2]))
+ col += 18
+ display(stdscr, row, col, "Blocked")
+
+ # display waited
+ row += 1
+ col = 2
+ display(stdscr, row, col, "%d" % dom)
+ col += 4
+ display(stdscr, row, col, "%s" % time_scale(h2[dom][3][0]))
+ col += 12
+ display(stdscr, row, col, "%3.2f%%" % h2[dom][3][1])
+ col += 12
+ display(stdscr, row, col, "%s/ex" % time_scale(h2[dom][3][2]))
+ col += 18
+ display(stdscr, row, col, "%s" % time_scale(h1[dom][3][0]))
+ col += 12
+ display(stdscr, row, col, "%3.2f%%" % h1[dom][3][1])
+ col += 12
+ display(stdscr, row, col, "%s/ex" % time_scale(h1[dom][3][2]))
+ col += 18
+ display(stdscr, row, col, "Waited")
+
+ # display ex count
+ row += 1
+ col = 2
+ display(stdscr, row, col, "%d" % dom)
+
+ col += 28
+ display(stdscr, row, col, "%d/s" % h2[dom][4])
+ col += 42
+ display(stdscr, row, col, "%d" % h1[dom][4])
+ col += 18
+ display(stdscr, row, col, "Execution count")
+
+ # display io count
+ row += 1
+ col = 2
+ display(stdscr, row, col, "%d" % dom)
+ col += 4
+ display(stdscr, row, col, "%d/s" % h2[dom][5][0])
+ col += 24
+ display(stdscr, row, col, "%d/ex" % h2[dom][5][1])
+ col += 18
+ display(stdscr, row, col, "%d" % h1[dom][5][0])
+ col += 24
+ display(stdscr, row, col, "%3.2f/ex" % h1[dom][5][1])
+ col += 18
+ display(stdscr, row, col, "I/O Count")
+
+ #row += 1
+ #stdscr.hline(row, 1, '-', maxx - 2)
+ total_h1_cpu += h1[dom][0][1]
+ total_h2_cpu += h2[dom][0][1]
+
+
+ row += 1
+ display(stdscr, row, 2, TOTALS % (total_h2_cpu, total_h1_cpu))
+ row += 1
+# display(stdscr, row, 2,
+# "\tFFP: %d (Min: %d, Max: %d)\t\t\tFFP: %d (Min: %d, Max %d)"
%
+# (math.ceil(f2[1]), f2[0], f2[2], math.ceil(f1[1]), f1[0],
f1[2]), _c.A_BOLD)
+
+ if l1[1] > 1 :
+ row += 1
+ display(stdscr, row, 2,
+ "\tRecords lost: %d (Min: %d, Max: %d)\t\t\tRecords lost:
%d (Min: %d, Max %d)" %
+ (math.ceil(l2[1]), l2[0], l2[2], math.ceil(l1[1]), l1[0],
l1[2]), _c.A_BOLD)
+
+ # grab a char from tty input; exit if interrupt hit
+ try:
+ c = stdscr.getch()
+ except:
+ break
+
+ # q = quit
+ if c == ord('q'):
+ break
+
+ # c = cycle to a new cpu of interest
+ if c == ord('c'):
+ cpu = (cpu + 1) % ncpu
+
+ stdscr.erase()
+
+ _c.nocbreak()
+ stdscr.keypad(0)
+ _c.echo()
+ _c.endwin()
+ shm.close()
+ shmf.close()
+
+
+# simple functions to allow initialization of log files without actually
+# physically creating files that are never used; only on the first real
+# write does the file get created
+class Delayed(file):
+ def __init__(self, filename, mode):
+ self.filename = filename
+ self.saved_mode = mode
+ self.delay_data = ""
+ self.opened = 0
+
+ def delayed_write(self, str):
+ self.delay_data = str
+
+ def write(self, str):
+ if not self.opened:
+ self.file = open(self.filename, self.saved_mode)
+ self.opened = 1
+ self.file.write(self.delay_data)
+ self.file.write(str)
+
+ def flush(self):
+ if self.opened:
+ self.file.flush()
+
+ def close(self):
+ if self.opened:
+ self.file.close()
+
+
+def writelog():
+ global options
+
+ ncpu = 1 # number of cpu's
+ slen = 0 # size of shared structure inc. padding
+
+ shmf = open(SHM_FILE, "r+")
+ shm = mmap.mmap(shmf.fileno(), QOS_DATA_SIZE)
+
+ interval = 0
+ outfiles = {}
+ for dom in range(0, NDOMAINS):
+ outfiles[dom] = Delayed("%s-dom%d.log" % (options.prefix, dom), 'w')
+ outfiles[dom].delayed_write("# passed cpu dom cpu(tot) cpu(%) cpu/ex
allocated/ex blocked(tot) blocked(%) blocked/io waited(tot) waited(%) waited/ex
ex/s io(tot) io/ex\n")
+
+ while options.duration == 0 or interval < (options.duration * 1000):
+ for cpuidx in range(0, ncpu):
+ idx = cpuidx * slen # offset needed in mmap file
+
+
+ samples = []
+ doms = []
+
+ for i in range(0, NSAMPLES):
+ len = struct.calcsize(ST_QDATA)
+ sample = struct.unpack(ST_QDATA, shm[idx:idx+len])
+ samples.append(sample)
+ idx += len
+
+ for i in range(0, NDOMAINS):
+ len = struct.calcsize(ST_DOM_INFO)
+ dom = struct.unpack(ST_DOM_INFO, shm[idx:idx+len])
+ doms.append(dom)
+ idx += len
+
+ len = struct.calcsize("4i")
+ oldncpu = ncpu
+ (next, ncpu, slen, freq) = struct.unpack("4i", shm[idx:idx+len])
+ idx += len
+
+ if oldncpu != ncpu:
+ shm = mmap.mmap(shmf.fileno(), ncpu*slen)
+
+ startat = next - 1
+ if next + 10 < NSAMPLES:
+ endat = next + 10
+ else:
+ endat = 10
+
+ [h1,l1, f1] = summarize(startat, endat, options.interval * 10**6,
samples)
+ for dom in range(0, NDOMAINS):
+ if h1[dom][0][1] > 0 or dom == NDOMAINS - 1:
+ outfiles[dom].write("%.3f %d %d %.3f %.3f %.3f %.3f %.3f
%.3f %.3f %.3f %.3f %.3f %.3f %.3f %.3f\n" %
+ (interval, cpuidx, dom,
+ h1[dom][0][0], h1[dom][0][1],
h1[dom][0][2],
+ h1[dom][1],
+ h1[dom][2][0], h1[dom][2][1],
h1[dom][2][2],
+ h1[dom][3][0], h1[dom][3][1],
h1[dom][3][2],
+ h1[dom][4],
+ h1[dom][5][0], h1[dom][5][1]))
+ outfiles[dom].flush()
+
+ interval += options.interval
+ time.sleep(1)
+
+ for dom in range(0, NDOMAINS):
+ outfiles[dom].close()
+
+# start xenbaked
+def start_xenbaked():
+ global options
+ global args
+
+ os.system("killall -9 xenbaked")
+ # assumes that xenbaked is in your path
+ os.system("xenbaked --ms_per_sample=%d &" %
+ options.mspersample)
+ time.sleep(1)
+
+# stop xenbaked
+def stop_xenbaked():
+ os.system("killall -s INT xenbaked")
+
+def main():
+ global options
+ global args
+ global domains
+
+ parser = setup_cmdline_parser()
+ (options, args) = parser.parse_args()
+
+ start_xenbaked()
+ if options.live:
+ show_livestats()
+ else:
+ try:
+ writelog()
+ except:
+ print 'Quitting.'
+ stop_xenbaked()
+
+if __name__ == "__main__":
+ main()
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