AMD EPYC throttled to 400 mhz
Hello,
we are experiencing spontaneous CPU speed throttlings.
System is a Lenovo ThinkSystem SR645 with 2
AMD EPYC 7452 32-Core Processor, running
Linux node3 5.10.0-10-amd64 #1 SMP Debian 5.10.84-1 (2021-12-08) x86_64
GNU/Linux
After some time (hours, day, weeks even) the system suddenly gets
throttled to 400 Mhz (see below)
HW Vendor replies with "Debian ist not on the supported OS" list, so we
are currently fighting on our own.
Does someone else experince the same/similar issue? It seems to my as
some kind of thermal throttling, but kernel does not log thottling
events. Maybe some Debian-specific kernel setting, that influences CPU
throttling..
root@node3:~# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 48 bits physical, 48 bits virtual
CPU(s): 64
On-line CPU(s) list: 0-63
Thread(s) per core: 1
Core(s) per socket: 32
Socket(s): 2
NUMA node(s): 2
Vendor ID: AuthenticAMD
CPU family: 23
Model: 49
Model name: AMD EPYC 7452 32-Core Processor
Stepping: 0
Frequency boost: enabled
CPU MHz: 399.256
CPU max MHz: 3364.3550
CPU min MHz: 1500.0000
BogoMIPS: 4691.25
Virtualization: AMD-V
L1d cache: 2 MiB
L1i cache: 2 MiB
L2 cache: 32 MiB
L3 cache: 256 MiB
NUMA node0 CPU(s): 0-31
NUMA node1 CPU(s): 32-63
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Spec store bypass: Vulnerable
Vulnerability Spectre v1: Vulnerable: __user pointer sanitization
and usercopy barriers only; no swapgs barriers
Vulnerability Spectre v2: Vulnerable, IBPB: disabled, STIBP: disabled
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
Flags: fpu vme de pse tsc msr pae mce cx8 apic
sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mm
xext fxsr_opt pdpe1gb rdtscp lm
constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni
pclmulqdq
monitor ssse3 fma cx16 sse4_1 sse4_2
movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic
cr8_leg
acy abm sse4a misalignsse 3dnowprefetch
osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc
mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd
mba ibrs ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed
adx smap clflushopt clwb sha_ni
xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total
cqm_mbm_local c
lzero irperf xsaveerptr rdpru wbnoinvd
amd_ppin arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid
decodeassists pausefilter pfthreshold
avic v_vmsave_vmload vgif umip rdpid overflow_recov succor smca
root@node3:~# cpupower monitor
| Mperf
PKG|CORE| CPU| C0 | Cx | Freq
0| 0| 0| 99.52| 0.48| 399
0| 1| 1| 99.52| 0.48| 399
0| 2| 2| 99.52| 0.48| 399
0| 3| 3| 99.52| 0.48| 399
0| 4| 4| 99.51| 0.49| 399
0| 5| 5| 99.51| 0.49| 399
0| 6| 6| 99.50| 0.50| 399
0| 7| 7| 99.50| 0.50| 399
0| 8| 8| 99.49| 0.51| 399
0| 9| 9| 99.49| 0.51| 399
0| 10| 10| 99.48| 0.52| 399
0| 11| 11| 99.48| 0.52| 399
0| 12| 12| 99.47| 0.53| 399
0| 13| 13| 99.46| 0.54| 399
0| 14| 14| 99.46| 0.54| 399
0| 15| 15| 99.45| 0.55| 399
0| 16| 16| 99.45| 0.55| 399
0| 17| 17| 99.45| 0.55| 399
0| 18| 18| 99.44| 0.56| 399
.....
Thanks,
Simon
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