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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v11 0/4] vnuma introduction
vNUMA introduction
This series of patches introduces vNUMA topology awareness and
provides interfaces and data structures to enable vNUMA for
PV guests. There is a plan to extend this support for dom0 and
HVM domains.
v11 of the series has patches 1 to 4, the libxl and libxc are to follow
in the next version after required changes will be made.
vNUMA topology support should be supported by PV guest kernel.
Corresponding patches should be applied.
Introduction
-------------
vNUMA topology is exposed to the PV guest to improve performance when running
workloads on NUMA machines. vNUMA enabled guests may be running on non-NUMA
machines and thus having virtual NUMA topology visible to guests.
XEN vNUMA implementation provides a way to run vNUMA-enabled guests on NUMA/UMA
and flexibly map vNUMA topology to physical NUMA topology.
Mapping to physical NUMA topology may be done in manual and automatic way.
By default, every PV domain has one vNUMA node. It is populated by default
parameters and does not affect performance. To use automatic way of initializing
vNUMA topology, configuration file need only to have number of vNUMA nodes
defined. Not-defined vNUMA topology parameters will be initialized to default
ones.
vNUMA topology is currently defined as a set of parameters such as:
number of vNUMA nodes;
number of vNUMA memory regions;
distance table;
vranges memory sizes*;
vcpus to vnodes mapping;
vnode to pnode map (for NUMA machines).
* As this series introduces vNUMA for PV guests, there is one range per vNUMA
node limit;
This set of patches introduces two hypercall subops: XEN_DOMCTL_setvnumainfo
and XENMEM_get_vnuma_info.
XEN_DOMCTL_setvnumainfo is used by toolstack to populate domain
vNUMA topology with user defined configuration or the parameters by default.
vNUMA is defined for every PV domain and if no vNUMA configuration found,
one vNUMA node is initialized and all cpus are assigned to it. All other
parameters set to their default values.
XENMEM_gevnumainfo is used by the PV domain to get the information
from hypervisor about vNUMA topology. Guest sends its memory sizes allocated
for different vNUMA parameters and hypervisor fills it with topology.
Future work to use this in HVM guests in the toolstack is required and
in the hypervisor to allow HVM guests to use these hypercalls.
libxl
libxl allows us to define vNUMA topology in configuration file and verifies that
configuration is correct. libxl also verifies mapping of vnodes to pnodes and
uses it in case of NUMA-machine and if automatic placement was disabled. In case
of incorrect/insufficient configuration, one vNUMA node will be initialized
and populated with default values.
libxc
libxc builds the vnodes memory addresses for guest and makes necessary
alignments to the addresses. It also takes into account guest e820 memory map
configuration. The domain memory is allocated and vnode to pnode mapping
is used to determine target node for particular vnode. If this mapping was not
defined, it is not a NUMA machine or automatic NUMA placement is enabled, the
default not node-specific allocation will be used.
hypervisor vNUMA initialization
PV guest
As of now, only PV guest can take advantage of vNUMA functionality.
Such guest allocates the memory for NUMA topology, sets number of nodes and
cpus so hypervisor has information about how much memory guest has
preallocated for vNUMA topology. Further guest makes subop hypercall
XENMEM_getvnumainfo.
If for some reason vNUMA topology cannot be initialized, Linux guest
will have only one NUMA node initialized (standard Linux behavior).
To enable this, vNUMA Linux patches should be applied and vNUMA supporting
patches should be applied to PV kernel.
Linux kernel patch is available here:
https://git.gitorious.org/vnuma/linux_vnuma.git
git://gitorious.org/vnuma/linux_vnuma.git
Automatic vNUMA placement
vNUMA automatic placement will be enabled if numa automatic placement is
not in enabled or, if disabled, if vnode to pnode mapping is incorrect. If
vnode to pnode mapping is correct and automatic NUMA placement disabled,
vNUMA nodes will be allocated on nodes as it was specified in the guest
config file.
Xen patchset is available here:
https://git.gitorious.org/vnuma/xen_vnuma.git
git://gitorious.org/vnuma/xen_vnuma.git
Examples of booting vNUMA enabled PV Linux guest on real NUMA machine:
memory = 4000
vcpus = 2
# The name of the domain, change this if you want more than 1 VM.
name = "null"
vnodes = 2
#vnumamem = [3000, 1000]
#vnumamem = [4000,0]
vdistance = [10, 20]
vnuma_vcpumap = [1, 0]
vnuma_vnodemap = [1]
vnuma_autoplacement = 0
#e820_host = 1
[ 0.000000] Linux version 3.15.0-rc8+ (assert@superpipe) (gcc version 4.7.2
(Debian 4.7.2-5) ) #43 SMP Fri Jun 27 01:23:11 EDT 2014
[ 0.000000] Command line: root=/dev/xvda1 ro earlyprintk=xen debug
loglevel=8 debug print_fatal_signals=1 loglvl=all guest_loglvl=all LOGLEVEL=8
earlyprintk=xen sched_debug
[ 0.000000] ACPI in unprivileged domain disabled
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[ 0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[ 0.000000] Xen: [mem 0x0000000000100000-0x00000000f9ffffff] usable
[ 0.000000] bootconsole [xenboot0] enabled
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] DMI not present or invalid.
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] No AGP bridge found
[ 0.000000] e820: last_pfn = 0xfa000 max_arch_pfn = 0x400000000
[ 0.000000] Base memory trampoline at [ffff88000009a000] 9a000 size 24576
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ 0.000000] [mem 0x00000000-0x000fffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0xf9e00000-0xf9ffffff]
[ 0.000000] [mem 0xf9e00000-0xf9ffffff] page 4k
[ 0.000000] BRK [0x019c8000, 0x019c8fff] PGTABLE
[ 0.000000] BRK [0x019c9000, 0x019c9fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0xf8000000-0xf9dfffff]
[ 0.000000] [mem 0xf8000000-0xf9dfffff] page 4k
[ 0.000000] BRK [0x019ca000, 0x019cafff] PGTABLE
[ 0.000000] BRK [0x019cb000, 0x019cbfff] PGTABLE
[ 0.000000] BRK [0x019cc000, 0x019ccfff] PGTABLE
[ 0.000000] BRK [0x019cd000, 0x019cdfff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x80000000-0xf7ffffff]
[ 0.000000] [mem 0x80000000-0xf7ffffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x00100000-0x7fffffff]
[ 0.000000] [mem 0x00100000-0x7fffffff] page 4k
[ 0.000000] RAMDISK: [mem 0x01dd8000-0x035c5fff]
[ 0.000000] Nodes received = 2
[ 0.000000] NUMA: Initialized distance table, cnt=2
[ 0.000000] Initmem setup node 0 [mem 0x00000000-0x7cffffff]
[ 0.000000] NODE_DATA [mem 0x7cfd9000-0x7cffffff]
[ 0.000000] Initmem setup node 1 [mem 0x7d000000-0xf9ffffff]
[ 0.000000] NODE_DATA [mem 0xf9828000-0xf984efff]
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x00001000-0x00ffffff]
[ 0.000000] DMA32 [mem 0x01000000-0xffffffff]
[ 0.000000] Normal empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00001000-0x0009ffff]
[ 0.000000] node 0: [mem 0x00100000-0x7cffffff]
[ 0.000000] node 1: [mem 0x7d000000-0xf9ffffff]
[ 0.000000] On node 0 totalpages: 511903
[ 0.000000] DMA zone: 64 pages used for memmap
[ 0.000000] DMA zone: 21 pages reserved
[ 0.000000] DMA zone: 3999 pages, LIFO batch:0
[ 0.000000] DMA32 zone: 7936 pages used for memmap
[ 0.000000] DMA32 zone: 507904 pages, LIFO batch:31
[ 0.000000] On node 1 totalpages: 512000
[ 0.000000] DMA32 zone: 8000 pages used for memmap
[ 0.000000] DMA32 zone: 512000 pages, LIFO batch:31
[ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
[ 0.000000] smpboot: Allowing 2 CPUs, 0 hotplug CPUs
[ 0.000000] nr_irqs_gsi: 16
[ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[ 0.000000] e820: [mem 0xfa000000-0xffffffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on Xen
[ 0.000000] Xen version: 4.5-unstable (preserve-AD)
[ 0.000000] setup_percpu: NR_CPUS:20 nr_cpumask_bits:20 nr_cpu_ids:2
nr_node_ids:2
[ 0.000000] PERCPU: Embedded 28 pages/cpu @ffff88007ac00000 s85888 r8192
d20608 u2097152
[ 0.000000] pcpu-alloc: s85888 r8192 d20608 u2097152 alloc=1*2097152
[ 0.000000] pcpu-alloc: [0] 0 [1] 1
[ 0.000000] xen: PV spinlocks enabled
[ 0.000000] Built 2 zonelists in Node order, mobility grouping on. Total
pages: 1007882
[ 0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: root=/dev/xvda1 ro earlyprintk=xen debug
loglevel=8 debug print_fatal_signals=1 loglvl=all guest_loglvl=all LOGLEVEL=8
earlyprintk=xen sched_debug
[ 0.000000] Memory: 3978224K/4095612K available (4022K kernel code, 769K
rwdata, 1744K rodata, 1532K init, 1472K bss, 117388K reserved)
[ 0.000000] Enabling automatic NUMA balancing. Configure with
numa_balancing= or the kernel.numa_balancing sysctl
[ 0.000000] installing Xen timer for CPU 0
[ 0.000000] tsc: Detected 2394.276 MHz processor
[ 0.004000] Calibrating delay loop (skipped), value calculated using timer
frequency.. 4788.55 BogoMIPS (lpj=9577104)
[ 0.004000] pid_max: default: 32768 minimum: 301
[ 0.004179] Dentry cache hash table entries: 524288 (order: 10, 4194304
bytes)
[ 0.006782] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
[ 0.007216] Mount-cache hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.007288] Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.007935] CPU: Physical Processor ID: 0
[ 0.007942] CPU: Processor Core ID: 0
[ 0.007951] Last level iTLB entries: 4KB 512, 2MB 8, 4MB 8
[ 0.007951] Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32, 1GB 0
[ 0.007951] tlb_flushall_shift: 6
[ 0.021249] cpu 0 spinlock event irq 17
[ 0.021292] Performance Events: unsupported p6 CPU model 45 no PMU driver,
software events only.
[ 0.022162] NMI watchdog: disabled (cpu0): hardware events not enabled
[ 0.022625] installing Xen timer for CPU 1
root@heatpipe:~# numactl --ha
available: 2 nodes (0-1)
node 0 cpus: 0
node 0 size: 1933 MB
node 0 free: 1894 MB
node 1 cpus: 1
node 1 size: 1951 MB
node 1 free: 1926 MB
node distances:
node 0 1
0: 10 20
1: 20 10
root@heatpipe:~# numastat
node0 node1
numa_hit 52257 92679
numa_miss 0 0
numa_foreign 0 0
interleave_hit 4254 4238
local_node 52150 87364
other_node 107 5315
root@superpipe:~# xl debug-keys u
(XEN) Domain 7 (total: 1024000):
(XEN) Node 0: 1024000
(XEN) Node 1: 0
(XEN) Domain has 2 vnodes, 2 vcpus
(XEN) vnode 0 - pnode 0, 2000 MB, vcpu nums: 0
(XEN) vnode 1 - pnode 0, 2000 MB, vcpu nums: 1
memory = 4000
vcpus = 8
# The name of the domain, change this if you want more than 1 VM.
name = "null1"
vnodes = 8
#vnumamem = [3000, 1000]
vdistance = [10, 40]
#vnuma_vcpumap = [1, 0, 3, 2]
vnuma_vnodemap = [1, 0, 1, 1, 0, 0, 1, 1]
vnuma_autoplacement = 1
e820_host = 1
[ 0.000000] Freeing ac228-fa000 pfn range: 318936 pages freed
[ 0.000000] 1-1 mapping on ac228->100000
[ 0.000000] Released 318936 pages of unused memory
[ 0.000000] Set 343512 page(s) to 1-1 mapping
[ 0.000000] Populating 100000-14ddd8 pfn range: 318936 pages added
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[ 0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[ 0.000000] Xen: [mem 0x0000000000100000-0x00000000ac227fff] usable
[ 0.000000] Xen: [mem 0x00000000ac228000-0x00000000ac26bfff] reserved
[ 0.000000] Xen: [mem 0x00000000ac26c000-0x00000000ac57ffff] unusable
[ 0.000000] Xen: [mem 0x00000000ac580000-0x00000000ac5a0fff] reserved
[ 0.000000] Xen: [mem 0x00000000ac5a1000-0x00000000ac5bbfff] unusable
[ 0.000000] Xen: [mem 0x00000000ac5bc000-0x00000000ac5bdfff] reserved
[ 0.000000] Xen: [mem 0x00000000ac5be000-0x00000000ac5befff] unusable
[ 0.000000] Xen: [mem 0x00000000ac5bf000-0x00000000ac5cafff] reserved
[ 0.000000] Xen: [mem 0x00000000ac5cb000-0x00000000ac5d9fff] unusable
[ 0.000000] Xen: [mem 0x00000000ac5da000-0x00000000ac5fafff] reserved
[ 0.000000] Xen: [mem 0x00000000ac5fb000-0x00000000ac6b5fff] unusable
[ 0.000000] Xen: [mem 0x00000000ac6b6000-0x00000000ac7fafff] ACPI NVS
[ 0.000000] Xen: [mem 0x00000000ac7fb000-0x00000000ac80efff] unusable
[ 0.000000] Xen: [mem 0x00000000ac80f000-0x00000000ac80ffff] ACPI data
[ 0.000000] Xen: [mem 0x00000000ac810000-0x00000000ac810fff] unusable
[ 0.000000] Xen: [mem 0x00000000ac811000-0x00000000ac812fff] ACPI data
[ 0.000000] Xen: [mem 0x00000000ac813000-0x00000000ad7fffff] unusable
[ 0.000000] Xen: [mem 0x00000000b0000000-0x00000000b3ffffff] reserved
[ 0.000000] Xen: [mem 0x00000000fed20000-0x00000000fed3ffff] reserved
[ 0.000000] Xen: [mem 0x00000000fed50000-0x00000000fed8ffff] reserved
[ 0.000000] Xen: [mem 0x00000000fee00000-0x00000000feefffff] reserved
[ 0.000000] Xen: [mem 0x00000000ffa00000-0x00000000ffa3ffff] reserved
[ 0.000000] Xen: [mem 0x0000000100000000-0x000000014ddd7fff] usable
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] DMI not present or invalid.
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] No AGP bridge found
[ 0.000000] e820: last_pfn = 0x14ddd8 max_arch_pfn = 0x400000000
[ 0.000000] e820: last_pfn = 0xac228 max_arch_pfn = 0x400000000
[ 0.000000] Base memory trampoline at [ffff88000009a000] 9a000 size 24576
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ 0.000000] [mem 0x00000000-0x000fffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x14da00000-0x14dbfffff]
[ 0.000000] [mem 0x14da00000-0x14dbfffff] page 4k
[ 0.000000] BRK [0x019cd000, 0x019cdfff] PGTABLE
[ 0.000000] BRK [0x019ce000, 0x019cefff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x14c000000-0x14d9fffff]
[ 0.000000] [mem 0x14c000000-0x14d9fffff] page 4k
[ 0.000000] BRK [0x019cf000, 0x019cffff] PGTABLE
[ 0.000000] BRK [0x019d0000, 0x019d0fff] PGTABLE
[ 0.000000] BRK [0x019d1000, 0x019d1fff] PGTABLE
[ 0.000000] BRK [0x019d2000, 0x019d2fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x100000000-0x14bffffff]
[ 0.000000] [mem 0x100000000-0x14bffffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x00100000-0xac227fff]
[ 0.000000] [mem 0x00100000-0xac227fff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x14dc00000-0x14ddd7fff]
[ 0.000000] [mem 0x14dc00000-0x14ddd7fff] page 4k
[ 0.000000] RAMDISK: [mem 0x01dd8000-0x0347ffff]
[ 0.000000] Nodes received = 8
[ 0.000000] NUMA: Initialized distance table, cnt=8
[ 0.000000] Initmem setup node 0 [mem 0x00000000-0x1f3fffff]
[ 0.000000] NODE_DATA [mem 0x1f3d9000-0x1f3fffff]
[ 0.000000] Initmem setup node 1 [mem 0x1f800000-0x3e7fffff]
[ 0.000000] NODE_DATA [mem 0x3e7d9000-0x3e7fffff]
[ 0.000000] Initmem setup node 2 [mem 0x3e800000-0x5dbfffff]
[ 0.000000] NODE_DATA [mem 0x5dbd9000-0x5dbfffff]
[ 0.000000] Initmem setup node 3 [mem 0x5e000000-0x7cffffff]
[ 0.000000] NODE_DATA [mem 0x7cfd9000-0x7cffffff]
[ 0.000000] Initmem setup node 4 [mem 0x7d000000-0x9c3fffff]
[ 0.000000] NODE_DATA [mem 0x9c3d9000-0x9c3fffff]
[ 0.000000] Initmem setup node 5 [mem 0x9c800000-0x10f5d7fff]
[ 0.000000] NODE_DATA [mem 0x10f5b1000-0x10f5d7fff]
[ 0.000000] Initmem setup node 6 [mem 0x10f800000-0x12e9d7fff]
[ 0.000000] NODE_DATA [mem 0x12e9b1000-0x12e9d7fff]
[ 0.000000] Initmem setup node 7 [mem 0x12f000000-0x14ddd7fff]
[ 0.000000] NODE_DATA [mem 0x14ddad000-0x14ddd3fff]
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x00001000-0x00ffffff]
[ 0.000000] DMA32 [mem 0x01000000-0xffffffff]
[ 0.000000] Normal [mem 0x100000000-0x14ddd7fff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00001000-0x0009ffff]
[ 0.000000] node 0: [mem 0x00100000-0x1f3fffff]
[ 0.000000] node 1: [mem 0x1f400000-0x3e7fffff]
[ 0.000000] node 2: [mem 0x3e800000-0x5dbfffff]
[ 0.000000] node 3: [mem 0x5dc00000-0x7cffffff]
[ 0.000000] node 4: [mem 0x7d000000-0x9c3fffff]
[ 0.000000] node 5: [mem 0x9c400000-0xac227fff]
[ 0.000000] node 5: [mem 0x100000000-0x10f5d7fff]
[ 0.000000] node 6: [mem 0x10f5d8000-0x12e9d7fff]
[ 0.000000] node 7: [mem 0x12e9d8000-0x14ddd7fff]
[ 0.000000] On node 0 totalpages: 127903
[ 0.000000] DMA zone: 64 pages used for memmap
[ 0.000000] DMA zone: 21 pages reserved
[ 0.000000] DMA zone: 3999 pages, LIFO batch:0
[ 0.000000] DMA32 zone: 1936 pages used for memmap
[ 0.000000] DMA32 zone: 123904 pages, LIFO batch:31
[ 0.000000] On node 1 totalpages: 128000
[ 0.000000] DMA32 zone: 2000 pages used for memmap
[ 0.000000] DMA32 zone: 128000 pages, LIFO batch:31
[ 0.000000] On node 2 totalpages: 128000
[ 0.000000] DMA32 zone: 2000 pages used for memmap
[ 0.000000] DMA32 zone: 128000 pages, LIFO batch:31
[ 0.000000] On node 3 totalpages: 128000
[ 0.000000] DMA32 zone: 2000 pages used for memmap
[ 0.000000] DMA32 zone: 128000 pages, LIFO batch:31
[ 0.000000] On node 4 totalpages: 128000
[ 0.000000] DMA32 zone: 2000 pages used for memmap
[ 0.000000] DMA32 zone: 128000 pages, LIFO batch:31
[ 0.000000] On node 5 totalpages: 128000
[ 0.000000] DMA32 zone: 1017 pages used for memmap
[ 0.000000] DMA32 zone: 65064 pages, LIFO batch:15
[ 0.000000] Normal zone: 984 pages used for memmap
[ 0.000000] Normal zone: 62936 pages, LIFO batch:15
[ 0.000000] On node 6 totalpages: 128000
[ 0.000000] Normal zone: 2000 pages used for memmap
[ 0.000000] Normal zone: 128000 pages, LIFO batch:31
[ 0.000000] On node 7 totalpages: 128000
[ 0.000000] Normal zone: 2000 pages used for memmap
[ 0.000000] Normal zone: 128000 pages, LIFO batch:31
[ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
[ 0.000000] smpboot: Allowing 8 CPUs, 0 hotplug CPUs
[ 0.000000] nr_irqs_gsi: 16
[ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac228000-0xac26bfff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac26c000-0xac57ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac580000-0xac5a0fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac5a1000-0xac5bbfff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac5bc000-0xac5bdfff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac5be000-0xac5befff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac5bf000-0xac5cafff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac5cb000-0xac5d9fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac5da000-0xac5fafff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac5fb000-0xac6b5fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac6b6000-0xac7fafff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac7fb000-0xac80efff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac80f000-0xac80ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac810000-0xac810fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac811000-0xac812fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xac813000-0xad7fffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xad800000-0xafffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xb0000000-0xb3ffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xb4000000-0xfed1ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed20000-0xfed3ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed40000-0xfed4ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed50000-0xfed8ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed90000-0xfedfffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfee00000-0xfeefffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfef00000-0xff9fffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xffa00000-0xffa3ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xffa40000-0xffffffff]
[ 0.000000] e820: [mem 0xb4000000-0xfed1ffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on Xen
[ 0.000000] Xen version: 4.5-unstable (preserve-AD)
[ 0.000000] setup_percpu: NR_CPUS:20 nr_cpumask_bits:20 nr_cpu_ids:8
nr_node_ids:8
[ 0.000000] PERCPU: Embedded 28 pages/cpu @ffff88001e800000 s85888 r8192
d20608 u2097152
[ 0.000000] pcpu-alloc: s85888 r8192 d20608 u2097152 alloc=1*2097152
[ 0.000000] pcpu-alloc: [0] 0 [1] 1 [2] 2 [3] 3 [4] 4 [5] 5 [6] 6 [7] 7
[ 0.000000] xen: PV spinlocks enabled
[ 0.000000] Built 8 zonelists in Node order, mobility grouping on. Total
pages: 1007881
[ 0.000000] Policy zone: Normal
[ 0.000000] Kernel command line: root=/dev/xvda1 ro console=hvc0 debug
kgdboc=hvc0 nokgdbroundup initcall_debug debug
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340
[ 0.000000] Checking aperture...
[ 0.000000] No AGP bridge found
[ 0.000000] Memory: 3976748K/4095612K available (4022K kernel code, 769K
rwdata, 1744K rodata, 1532K init, 1472K bss, 118864K reserved)
root@heatpipe:~# numactl --ha
maxn: 7
available: 8 nodes (0-7)
node 0 cpus: 0
node 0 size: 458 MB
node 0 free: 424 MB
node 1 cpus: 1
node 1 size: 491 MB
node 1 free: 481 MB
node 2 cpus: 2
node 2 size: 491 MB
node 2 free: 482 MB
node 3 cpus: 3
node 3 size: 491 MB
node 3 free: 485 MB
node 4 cpus: 4
node 4 size: 491 MB
node 4 free: 485 MB
node 5 cpus: 5
node 5 size: 491 MB
node 5 free: 484 MB
node 6 cpus: 6
node 6 size: 491 MB
node 6 free: 486 MB
node 7 cpus: 7
node 7 size: 476 MB
node 7 free: 471 MB
node distances:
node 0 1 2 3 4 5 6 7
0: 10 40 40 40 40 40 40 40
1: 40 10 40 40 40 40 40 40
2: 40 40 10 40 40 40 40 40
3: 40 40 40 10 40 40 40 40
4: 40 40 40 40 10 40 40 40
5: 40 40 40 40 40 10 40 40
6: 40 40 40 40 40 40 10 40
7: 40 40 40 40 40 40 40 10
root@heatpipe:~# numastat
node0 node1 node2 node3
numa_hit 182203 14574 23800 17017
numa_miss 0 0 0 0
numa_foreign 0 0 0 0
interleave_hit 1016 1010 1051 1030
local_node 180995 12906 23272 15338
other_node 1208 1668 528 1679
node4 node5 node6 node7
numa_hit 10621 15346 3529 3863
numa_miss 0 0 0 0
numa_foreign 0 0 0 0
interleave_hit 1026 1017 1031 1029
local_node 8941 13680 1855 2184
other_node 1680 1666 1674 1679
root@superpipe:~# xl debug-keys u
(XEN) Domain 6 (total: 1024000):
(XEN) Node 0: 321064
(XEN) Node 1: 702936
(XEN) Domain has 8 vnodes, 8 vcpus
(XEN) vnode 0 - pnode 1, 500 MB, vcpu nums: 0
(XEN) vnode 1 - pnode 0, 500 MB, vcpu nums: 1
(XEN) vnode 2 - pnode 1, 500 MB, vcpu nums: 2
(XEN) vnode 3 - pnode 1, 500 MB, vcpu nums: 3
(XEN) vnode 4 - pnode 0, 500 MB, vcpu nums: 4
(XEN) vnode 5 - pnode 0, 1841 MB, vcpu nums: 5
(XEN) vnode 6 - pnode 1, 500 MB, vcpu nums: 6
(XEN) vnode 7 - pnode 1, 500 MB, vcpu nums: 7
Current problems:
This was marked as separate porblem but leaving it here for reference.
Warning on CPU bringup on other node
The cpus in guest wich belong to different NUMA nodes are configured
to chare same l2 cache and thus considered to be siblings and cannot
be on the same node. One can see following WARNING during the boot time:
[ 0.022750] SMP alternatives: switching to SMP code
[ 0.004000] ------------[ cut here ]------------
[ 0.004000] WARNING: CPU: 1 PID: 0 at arch/x86/kernel/smpboot.c:303
topology_sane.isra.8+0x67/0x79()
[ 0.004000] sched: CPU #1's smt-sibling CPU #0 is not on the same node!
[node: 1 != 0]. Ignoring dependency.
[ 0.004000] Modules linked in:
[ 0.004000] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.15.0-rc8+ #43
[ 0.004000] 0000000000000000 0000000000000009 ffffffff813df458
ffff88007abe7e60
[ 0.004000] ffffffff81048963 ffff88007abe7e70 ffffffff8102fb08
ffffffff00000100
[ 0.004000] 0000000000000001 ffff8800f6e13900 0000000000000000
000000000000b018
[ 0.004000] Call Trace:
[ 0.004000] [<ffffffff813df458>] ? dump_stack+0x41/0x51
[ 0.004000] [<ffffffff81048963>] ? warn_slowpath_common+0x78/0x90
[ 0.004000] [<ffffffff8102fb08>] ? topology_sane.isra.8+0x67/0x79
[ 0.004000] [<ffffffff81048a13>] ? warn_slowpath_fmt+0x45/0x4a
[ 0.004000] [<ffffffff8102fb08>] ? topology_sane.isra.8+0x67/0x79
[ 0.004000] [<ffffffff8102fd2e>] ? set_cpu_sibling_map+0x1c9/0x3f7
[ 0.004000] [<ffffffff81042146>] ? numa_add_cpu+0xa/0x18
[ 0.004000] [<ffffffff8100b4e2>] ? cpu_bringup+0x50/0x8f
[ 0.004000] [<ffffffff8100b544>] ? cpu_bringup_and_idle+0x1d/0x28
[ 0.004000] ---[ end trace 0e2e2fd5c7b76da5 ]---
[ 0.035371] x86: Booted up 2 nodes, 2 CPUs
The workaround is to specify cpuid in config file and not use SMT. But soon I
will come up
with some other acceptable solution.
Incorrect amount of memory for nodes in debug-keys output
Since the node ranges per domain are saved in guest addresses, the memory
calculated is incorrect due to the guest e820 memory holes for some nodes.
TODO:
- some modifications to automatic vnuma placement may be needed;
- vdistance extended configuration parser will need to be in place;
- SMT siblings problem (see above) will need a solution (different series);
Changes since v10:
- excluded patches 5-9 as they need some work done; Will be posted in next
version;
Changes since v9:
- in XENMEM_get_vnumainfo adds condition for successful hypercall
completion if vnuma topology was changed while allocation temp arrays
and allocated arrays are big enough to hold new values;
Changes since v8:
- added support in hypervisor for multi-range nodes for non-PV guests;
- added padding to structures, made sure they set to zero and checked;
Changes since v7:
- Extended interface to support multi-regions vnuma nodes; Currently
toolstack
does not use regions and they are being treated as vnuma nodes with one
region;
- Added explicit padding for vnuma_topology_info for proper alignment;
- Added copying back to client of required values on failure path in
XENDOMCTL_set_vnumainfo
so caller can restart;
- Coding style fixes and other recommended minor changes;
- Changed the minimum vnume node size to match linux x86 arch limit;
Changes since v6:
- added limit on number of vNUMA nodes per domain (32) on Xen side.
This will be increased in next version as this limit seem to be not
bug enough;
- added read_write lock to synchronize access to vnuma structure to domain
structure;
- added copy back of actual number of vcpus back to guest;
- added xsm example policies;
- reorganized series the way that xl implementation goes after libxl
definitions;
- changed the idl names for vnuma structure members in libxc;
- changed the failure path in Xen when setting vnuma topology to dont
create default
node, but fail instead and not introduce different views on vnuma between
toolstack
and Xen;
- changed failure path when parsing vnuma config to just fail instead of
creating single
default node;
Changes since v5:
- reorganized patches;
- modified domctl hypercall and added locking;
- added XSM hypercalls with basic policies;
- verify 32bit compatibility;
Elena Ufimtseva (4):
xen: vnuma topology and subop hypercalls
xsm bits for vNUMA hypercalls
vnuma hook to debug-keys u
libxc: Introduce xc_domain_setvnuma to set vNUMA
tools/flask/policy/policy/modules/xen/xen.if | 3 +-
tools/flask/policy/policy/modules/xen/xen.te | 2 +-
tools/libxc/xc_domain.c | 68 +++++++++++++
tools/libxc/xenctrl.h | 10 ++
xen/arch/x86/numa.c | 35 ++++++-
xen/common/domain.c | 3 +
xen/common/domctl.c | 136 ++++++++++++++++++++++++++
xen/common/memory.c | 133 +++++++++++++++++++++++++
xen/include/public/domctl.h | 31 ++++++
xen/include/public/memory.h | 52 +++++++++-
xen/include/xen/domain.h | 12 +++
xen/include/xen/sched.h | 4 +
xen/include/xsm/dummy.h | 6 ++
xen/include/xsm/xsm.h | 7 ++
xen/xsm/dummy.c | 1 +
xen/xsm/flask/hooks.c | 10 ++
xen/xsm/flask/policy/access_vectors | 4 +
17 files changed, 513 insertions(+), 4 deletions(-)
--
1.7.10.4
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