[Xen-devel] [RFC 2/9] sysctl: extend XEN_SYSCTL_getcpuinfo interface

[Andrii Anisov <andrii.anisov@xxxxxxxxx>]

From: Andrii Anisov <andrii_anisov@xxxxxxxx>

Extend XEN_SYSCTL_getcpuinfo interface with timing information
provided by introduced time accounting infrastructure.

Signed-off-by: Andrii Anisov <andrii_anisov@xxxxxxxx>
---
 xen/common/schedule.c       | 33 ++++++++++++++++++++++++++++-----
 xen/common/sysctl.c         |  4 ++++
 xen/include/public/sysctl.h |  4 ++++
 xen/include/xen/sched.h     |  4 ++++
 4 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/xen/common/schedule.c b/xen/common/schedule.c
index 6dd6603..2007034 100644
--- a/xen/common/schedule.c
+++ b/xen/common/schedule.c
@@ -208,13 +208,36 @@ void vcpu_runstate_get(struct vcpu *v, struct 
vcpu_runstate_info *runstate)
 
 uint64_t get_cpu_idle_time(unsigned int cpu)
 {
-    struct vcpu_runstate_info state = { 0 };
-    struct vcpu *v = idle_vcpu[cpu];
+    struct tacc *tacc = &per_cpu(tacc, cpu);
 
-    if ( cpu_online(cpu) && v )
-        vcpu_runstate_get(v, &state);
+    return tacc->state_time[TACC_IDLE];
+}
+
+uint64_t get_cpu_guest_time(unsigned int cpu)
+{
+    struct tacc *tacc = &per_cpu(tacc, cpu);
+
+    return tacc->state_time[TACC_GUEST];
+}
+
+uint64_t get_cpu_hyp_time(unsigned int cpu)
+{
+    struct tacc *tacc = &per_cpu(tacc, cpu);
+
+    return tacc->state_time[TACC_HYP];
+}
+
+uint64_t get_cpu_irq_time(unsigned int cpu)
+{
+    struct tacc *tacc = &per_cpu(tacc, cpu);
+
+    return tacc->state_time[TACC_IRQ];
+}
+uint64_t get_cpu_gsync_time(unsigned int cpu)
+{
+    struct tacc *tacc = &per_cpu(tacc, cpu);
 
-    return state.time[RUNSTATE_running];
+    return tacc->state_time[TACC_GSYNC];
 }
 
 /*
diff --git a/xen/common/sysctl.c b/xen/common/sysctl.c
index 92b4ea0..b63083c 100644
--- a/xen/common/sysctl.c
+++ b/xen/common/sysctl.c
@@ -152,6 +152,10 @@ long do_sysctl(XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) 
u_sysctl)
         for ( i = 0; i < nr_cpus; i++ )
         {
             cpuinfo.idletime = get_cpu_idle_time(i);
+            cpuinfo.guesttime = get_cpu_guest_time(i);
+            cpuinfo.hyptime = get_cpu_hyp_time(i);
+            cpuinfo.gsynctime = get_cpu_gsync_time(i);
+            cpuinfo.irqtime = get_cpu_irq_time(i);
 
             if ( copy_to_guest_offset(op->u.getcpuinfo.info, i, &cpuinfo, 1) )
                 goto out;
diff --git a/xen/include/public/sysctl.h b/xen/include/public/sysctl.h
index 5401f9c..cdada1f 100644
--- a/xen/include/public/sysctl.h
+++ b/xen/include/public/sysctl.h
@@ -168,6 +168,10 @@ struct xen_sysctl_debug_keys {
 /* XEN_SYSCTL_getcpuinfo */
 struct xen_sysctl_cpuinfo {
     uint64_aligned_t idletime;
+    uint64_aligned_t hyptime;
+    uint64_aligned_t guesttime;
+    uint64_aligned_t irqtime;
+    uint64_aligned_t gsynctime;
 };
 typedef struct xen_sysctl_cpuinfo xen_sysctl_cpuinfo_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpuinfo_t);
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index 04a8724..8167608 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -876,6 +876,10 @@ void restore_vcpu_affinity(struct domain *d);
 
 void vcpu_runstate_get(struct vcpu *v, struct vcpu_runstate_info *runstate);
 uint64_t get_cpu_idle_time(unsigned int cpu);
+uint64_t get_cpu_hyp_time(unsigned int cpu);
+uint64_t get_cpu_guest_time(unsigned int cpu);
+uint64_t get_cpu_gsync_time(unsigned int cpu);
+uint64_t get_cpu_irq_time(unsigned int cpu);
 
 /*
  * Used by idle loop to decide whether there is work to do:
-- 
2.7.4


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