hi, when running 'perf top' on AMD Rome (/proc/cpuinfo below) with fedora 33 kernel 5.10.22-200.fc33.x86_64
we got unknown NMI messages: [ 226.700160] Uhhuh. NMI received for unknown reason 3d on CPU 90. [ 226.700162] Do you have a strange power saving mode enabled? [ 226.700163] Dazed and confused, but trying to continue [ 226.769565] Uhhuh. NMI received for unknown reason 3d on CPU 84. [ 226.769566] Do you have a strange power saving mode enabled? [ 226.769567] Dazed and confused, but trying to continue [ 226.769771] Uhhuh. NMI received for unknown reason 2d on CPU 24. [ 226.769773] Do you have a strange power saving mode enabled? [ 226.769774] Dazed and confused, but trying to continue [ 226.812844] Uhhuh. NMI received for unknown reason 2d on CPU 23. [ 226.812846] Do you have a strange power saving mode enabled? [ 226.812847] Dazed and confused, but trying to continue [ 226.893783] Uhhuh. NMI received for unknown reason 2d on CPU 27. [ 226.893785] Do you have a strange power saving mode enabled? [ 226.893786] Dazed and confused, but trying to continue [ 226.900139] Uhhuh. NMI received for unknown reason 2d on CPU 40. [ 226.900141] Do you have a strange power saving mode enabled? [ 226.900143] Dazed and confused, but trying to continue [ 226.908763] Uhhuh. NMI received for unknown reason 3d on CPU 120. [ 226.908765] Do you have a strange power saving mode enabled? [ 226.908766] Dazed and confused, but trying to continue [ 227.751296] Uhhuh. NMI received for unknown reason 2d on CPU 83. [ 227.751298] Do you have a strange power saving mode enabled? [ 227.751299] Dazed and confused, but trying to continue [ 227.752937] Uhhuh. NMI received for unknown reason 3d on CPU 23. also when discussing ths with Borislav, he managed to reproduce easily on his AMD Rome machine any idea? thanks, jirka --- processor : 0 vendor_id : AuthenticAMD cpu family : 23 model : 49 model name : AMD EPYC 7742 64-Core Processor stepping : 0 microcode : 0x8301034 cpu MHz : 1497.024 cache size : 512 KB physical id : 0 siblings : 64 core id : 0 cpu cores : 64 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 16 wp : yes 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 mmxext 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_legacy 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 sme ssbd mba sev ibrs ibpb stibp vmmcall sev_es 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 clzero irperf xsaveerptr rdpru wbnoinvd 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 bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass bogomips : 4491.76 TLB size : 3072 4K pages clflush size : 64 cache_alignment : 64 address sizes : 43 bits physical, 48 bits virtual power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
