Re: AMD Pstate

Mike Lothian
2021-11-24T00:17:29Z

On Tue, 23 Nov 2021 at 11:33, Huang Rui <ray.huang@amd.com> wrote:
>
> >
> > Hi
> >
> > Yes I used v4 and CONFIG_CPU_FREQ_GOV_SCHEDUTIL was set as the
> > default, is there any other info that would be useful, I can switch
> > back to schedutil from ondemand and collect for you
> >
>
> > > > That's on a AMD Ryzen 9 5900HX
>
> May I know the CPU family/model id? (you can dump it from lscpu)
>
> But you may need to add "amd_pstate.shared_mem=1" in your grub to enable
> the shared memory manually. Because we are debugging the performance issue
> on shared memory solution, so it is disabled by default.
>
> > > > amd_des_perf = clamp_t(unsigned long, amd_des_perf,
>
> It's not the V4's codes. I renamed this variate in the V4.
>
> Thanks,
> Ray

Hmm very strange, can you confirm this download from patchwork (which
is what's applied) is correct or not
https://patchwork.kernel.org/series/582973/mbox/

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 Ryzen 9 5900HX with Radeon Graphics
CPU family: 25
Model: 80
Thread(s) per core: 2
Core(s) per socket: 8
Socket(s): 1
Stepping: 0
Frequency boost: enabled
CPU max MHz: 4890.0000
CPU min MHz: 400.0000
BogoMIPS: 6587.55
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
misaligns
se 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 bm
i2 erms invpcid cqm rdt_a rdseed adx
clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc
cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr
rdpru wbnoinvd cppc
arat npt lbrv svm_lock nrip_save tsc_scale
vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic
v_vmsave_vmload vgif v_spec_ctrl umip pku vaes vpclmulqdq rdpid
overflow_re
cov succor smca fsrm
Virtualization features:
Virtualization: AMD-V
Caches (sum of all):
L1d: 256 KiB (8 instances)
L1i: 256 KiB (8 instances)
L2: 4 MiB (8 instances)
L3: 16 MiB (1 instance)
Vulnerabilities:
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Spectre v1: Mitigation; usercopy/swapgs barriers and
__user pointer sanitization
Spectre v2: Mitigation; Full AMD retpoline, IBPB
conditional, IBRS_FW, STIBP always-on, RSB filling
Srbds: Not affected
Tsx async abort: Not affected