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Hello Everyone,
We would want to monitor power consumption of individual cores and turn off cores completely during specific times of a day. I read a lot of articles on this topic, but have not been able to achieve this objective.
I created a Ubuntu 20.04 and testing this. I do not see any files under ls /sys/class/powercap and do not see any power stats reported under turbostat(its all 0, i also stress tested the CPU using stress-ng but the figures do not change). Below are few details -
# ls /sys/class/powercap
#
# turbostat
turbostat version 19.08.31 - Len Brown <lenb@kernel.org>
CPUID(0): GenuineIntel 0x16 CPUID levels; 0x80000008 xlevels; family:model:stepping 0x6:55:4 (6:85:4)
CPUID(1): SSE3 - - - - TSC MSR - - -
CPUID(6): No-APERF, No-TURBO, No-DTS, No-PTM, No-HWP, No-HWPnotify, No-HWPwindow, No-HWPepp, No-HWPpkg, No-EPB
cpu1: MSR_IA32_MISC_ENABLE: 0x00000000 (No-TCC No-EIST No-MWAIT PREFETCH TURBO)
CPUID(7): No-SGX
CPUID(0x16): base_mhz: 0 max_mhz: 0 bus_mhz: 0
cpu1: MSR_MISC_PWR_MGMT: 0x00000000 (ENable-EIST_Coordination DISable-EPB DISable-OOB)
RAPL: inf sec. Joule Counter Range, at 0 Watts
cpu1: MSR_PLATFORM_INFO: 0x80000000
0 * 100.0 = 0.0 MHz max efficiency frequency
0 * 100.0 = 0.0 MHz base frequency
cpu1: MSR_IA32_POWER_CTL: 0x00000000 (C1E auto-promotion: DISabled)
cpu1: MSR_TURBO_RATIO_LIMIT: 0x00000000
cpu1: MSR_TURBO_RATIO_LIMIT1: 0x00000000
cpu1: MSR_CONFIG_TDP_NOMINAL: 0x00000000 (base_ratio=0)
cpu1: MSR_CONFIG_TDP_LEVEL_1: 0x00000000 ()
cpu1: MSR_CONFIG_TDP_LEVEL_2: 0x00000000 ()
cpu1: MSR_CONFIG_TDP_CONTROL: 0x00000000 ( lock=0)
cpu1: MSR_TURBO_ACTIVATION_RATIO: 0x00000000 (MAX_NON_TURBO_RATIO=0 lock=0)
cpu1: MSR_PKG_CST_CONFIG_CONTROL: 0x00000000 (UNlocked, pkg-cstate-limit=0 (pc0), automatic c-state conversion=off)
NSFOD /sys/devices/system/cpu/cpu1/cpufreq/scaling_driver
cpu1: MSR_MISC_FEATURE_CONTROL: 0x00000000 (L2-Prefetch L2-Prefetch-pair L1-Prefetch L1-IP-Prefetch)
cpu0: MSR_RAPL_POWER_UNIT: 0x00000000 (1.000000 Watts, 1.000000 Joules, 0.000977 sec.)
cpu0: MSR_PKG_POWER_INFO: 0x00000000 (0 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
cpu0: MSR_PKG_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: PKG Limit #1: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
cpu0: PKG Limit #2: DISabled (0.000000 Watts, 0.000977* sec, clamp DISabled)
cpu0: MSR_DRAM_POWER_INFO,: 0x00000000 (0 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
cpu0: MSR_DRAM_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: DRAM Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
cpu1: MSR_RAPL_POWER_UNIT: 0x00000000 (1.000000 Watts, 1.000000 Joules, 0.000977 sec.)
cpu1: MSR_PKG_POWER_INFO: 0x00000000 (0 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
cpu1: MSR_PKG_POWER_LIMIT: 0x00000000 (UNlocked)
cpu1: PKG Limit #1: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
cpu1: PKG Limit #2: DISabled (0.000000 Watts, 0.000977* sec, clamp DISabled)
cpu1: MSR_DRAM_POWER_INFO,: 0x00000000 (0 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
cpu1: MSR_DRAM_POWER_LIMIT: 0x00000000 (UNlocked)
cpu1: DRAM Limit: DISabled (0.000000 Watts, 0.000977 sec, clamp DISabled)
cpu1: MSR_PKGC3_IRTL: 0x00000000 (NOTvalid, 0 ns)
cpu1: MSR_PKGC6_IRTL: 0x00000000 (NOTvalid, 0 ns)
cpu1: MSR_PKGC7_IRTL: 0x00000000 (NOTvalid, 0 ns)
Package CPU TSC_MHz IRQ SMI CPU%c1 CPU%c6 PkgWatt RAMWatt PKG_% RAM_%
- - 2594 483 0 100.00 0.00 0.00 0.00 0.00 0.00
0 0 2594 274 0 100.00 0.00 0.00 0.00 0.00 0.00
2 1 2594 209 0 100.00 0.00 0.00 0.00 0.00 0.00
Package CPU TSC_MHz IRQ SMI CPU%c1 CPU%c6 PkgWatt RAMWatt PKG_% RAM_%
- - 2594 206 0 100.00 0.00 0.00 0.00 0.00 0.00
0 0 2594 131 0 100.00 0.00 0.00 0.00 0.00 0.00
2 1 2594 75 0 100.00 0.00 0.00 0.00 0.00 0.00
#
OS level settings: ( I think it is set correctly)
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.6 LTS
Release: 20.04
Codename: focal
# grep CONFIG_POWERCAP /boot/config-5.4.0-186-generic
CONFIG_POWERCAP=y
# grep CONFIG_INTEL_RAPL /boot/config-5.4.0-186-generic
CONFIG_INTEL_RAPL_CORE=m
CONFIG_INTEL_RAPL=m
#
CPU info:
# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 45 bits physical, 48 bits virtual
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 2
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 85
Model name: Intel(R) Xeon(R) Silver 4112 CPU @ 2.60GHz
Stepping: 4
CPU MHz: 2593.906
BogoMIPS: 5187.81
Virtualization: VT-x
Hypervisor vendor: VMware
Virtualization type: full
# cpuid -l 1 -1 |grep -v true
CPU:
version information (1/eax):
processor type = primary processor (0)
family = 0x6 (6)
model = 0x5 (5)
stepping id = 0x4 (4)
extended family = 0x0 (0)
extended model = 0x5 (5)
(family synth) = 0x6 (6)
(model synth) = 0x55 (85)
miscellaneous (1/ebx):
process local APIC physical ID = 0x2 (2)
cpu count = 0x1 (1)
CLFLUSH line size = 0x8 (8)
brand index = 0x0 (0)
brand id = 0x00 (0): unknown
feature information (1/edx):
PSN: processor serial number = false
DS: debug store = false
ACPI: thermal monitor and clock ctrl = false
hyper-threading / multi-core supported = false
TM: therm. monitor = false
IA64 = false
PBE: pending break event = false
feature information (1/ecx):
DTES64: 64-bit debug store = false
MONITOR/MWAIT = false
CPL-qualified debug store = false
SMX: safer mode extensions = false
Enhanced Intel SpeedStep Technology = false
TM2: thermal monitor 2 = false
context ID: adaptive or shared L1 data = false
SDBG: IA32_DEBUG_INTERFACE = false
xTPR disable = false
PDCM: perfmon and debug = false
DCA: direct cache access = false
#
I checked and there is no clear indication the CPU is not supported.
# cat /sys/devices/cpu/caps/pmu_name
skylake
https://web.eece.maine.edu/~vweaver/projects/rapl/rapl_support.html
Name Family Model package PP0 (usually cores) PP1 (usually GPU) DRAM PSys powercap perf_event PAPI
Skylake Server 6 85 Y Y N Y N 4.8??? 4.8 (348c5ac6c7dc11) yes
Few links i referred to -
https://community.intel.com/t5/Processors/RAPL-PP0-supported-but-not-enabled/m-p/1550189
https://ark.intel.com/content/www/us/en/ark/products/codename/37572/products-formerly-skylake.html
Maybe i am missing something obvious. Or is there some setting that has to be enabled at ESXi level? Please check and let me know.
Regards,
Abhi
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Intel's RAPL power monitoring facility does not support monitoring of individual cores. Depending on the processor model you can monitor the power used by *all* cores in a socket, the power used by all the DRAM attached to a socket, the power used by everything in the socket, and for some client processors the power used by uncore devices (like an embedded GPU).
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