Subj : epyc
To : Benny Pedersen
From : Maurice Kinal
Date : Fri Aug 04 2023 09:29 pm
Hey Benny!
This is a zen1 cpu and not zen2 as earlier reported. It works for me. :-)
:r !lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 48 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 16
On-line CPU(s) list: 0-15
Vendor ID: AuthenticAMD
Model name: AMD EPYC 3251 8-Core Processor
CPU family: 23
Model: 1
Thread(s) per core: 2
Core(s) per socket: 8
Socket(s): 1
Stepping: 2
Frequency boost: enabled
CPU(s) scaling MHz: 48%
CPU max MHz: 2500.0000
CPU min MHz: 1200.0000
BogoMIPS: 5000.26
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 rapl 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 skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca
Virtualization: AMD-V
L1d cache: 256 KiB (8 instances)
L1i cache: 512 KiB (8 instances)
L2 cache: 4 MiB (8 instances)
L3 cache: 16 MiB (2 instances)
NUMA node(s): 1
NUMA node0 CPU(s): 0-15
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Mmio stale data: Not affected
Vulnerability Retbleed: Mitigation; untrained return thunk; SMT vulnerable
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2: Mitigation; Retpolines, IBPB conditional, STIBP disabled, RSB filling, PBRSB-eIBRS Not affected
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
:r !uname -a
Linux amiitoo 6.4.8 #1 SMP PREEMPT_DYNAMIC Fri Aug 4 15:16:29 UTC 2023 x86_64 GNU/Linux
Note that it reports x86_64 which is the same for the Ryzens (and Intels) as I've been optimizing for that. This kernel can boot on any machine here. I think this is better output;
:r /proc/version
Linux version 6.4.8 (root@amiitoo) (gcc (GCC) 13.2.0, GNU ld (GNU Binutils) 2.41) #1 SMP PREEMPT_DYNAMIC Fri Aug 4 15:16:29 UTC 2023
Life is good,
Maurice
o- -o -o o- o- -o -o o- -o o- o- -o o- -o o- o-
/) (\ (\ /) /) (\ (\ /) (\ /) /) (\ /) (\ /) /)
^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^
... Fidonet Unplugged - One in a million.
--- GNU bash, version 5.2.15(1)-release (x86_64-pc-linux-gnu)
* Origin: One of us @ (1:153/7001.53423)
