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kevinlekiller / amdctl

Set P-State voltages and clock speeds on recent AMD CPUs on Linux.
GNU General Public License v3.0
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Is pstates list correct? #9

Closed alsoijw closed 2 years ago

alsoijw commented 5 years ago

I have AMD Quad Core A12-9720P

$ cat /proc/cpuinfo 
processor   : 0
vendor_id   : AuthenticAMD
cpu family  : 21
model       : 101
model name  : AMD A12-9720P RADEON R7, 12 COMPUTE CORES 4C+8G
stepping    : 1
microcode   : 0x6006118
cpu MHz     : 1635.759
cache size  : 1024 KB
physical id : 0
siblings    : 4
core id     : 0
cpu cores   : 2
apicid      : 16
initial apicid  : 0
fpu     : yes
fpu_exception   : yes
cpuid level : 13
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 acc_power 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 xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb bpext ptsc mwaitx cpb hw_pstate ssbd vmmcall fsgsbase bmi1 avx2 smep bmi2 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov
bugs        : fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass
bogomips    : 5391.99
TLB size    : 1536 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro acc_power [13]

processor   : 1
vendor_id   : AuthenticAMD
cpu family  : 21
model       : 101
model name  : AMD A12-9720P RADEON R7, 12 COMPUTE CORES 4C+8G
stepping    : 1
microcode   : 0x6006118
cpu MHz     : 1588.258
cache size  : 1024 KB
physical id : 0
siblings    : 4
core id     : 1
cpu cores   : 2
apicid      : 17
initial apicid  : 1
fpu     : yes
fpu_exception   : yes
cpuid level : 13
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 acc_power 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 xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb bpext ptsc mwaitx cpb hw_pstate ssbd vmmcall fsgsbase bmi1 avx2 smep bmi2 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov
bugs        : fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass
bogomips    : 5391.99
TLB size    : 1536 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro acc_power [13]

processor   : 2
vendor_id   : AuthenticAMD
cpu family  : 21
model       : 101
model name  : AMD A12-9720P RADEON R7, 12 COMPUTE CORES 4C+8G
stepping    : 1
microcode   : 0x6006118
cpu MHz     : 1672.267
cache size  : 1024 KB
physical id : 0
siblings    : 4
core id     : 2
cpu cores   : 2
apicid      : 18
initial apicid  : 2
fpu     : yes
fpu_exception   : yes
cpuid level : 13
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 acc_power 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 xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb bpext ptsc mwaitx cpb hw_pstate ssbd vmmcall fsgsbase bmi1 avx2 smep bmi2 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov
bugs        : fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass
bogomips    : 5391.99
TLB size    : 1536 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro acc_power [13]

processor   : 3
vendor_id   : AuthenticAMD
cpu family  : 21
model       : 101
model name  : AMD A12-9720P RADEON R7, 12 COMPUTE CORES 4C+8G
stepping    : 1
microcode   : 0x6006118
cpu MHz     : 1659.357
cache size  : 1024 KB
physical id : 0
siblings    : 4
core id     : 3
cpu cores   : 2
apicid      : 19
initial apicid  : 3
fpu     : yes
fpu_exception   : yes
cpuid level : 13
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 acc_power 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 xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb bpext ptsc mwaitx cpb hw_pstate ssbd vmmcall fsgsbase bmi1 avx2 smep bmi2 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov
bugs        : fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass
bogomips    : 5391.99
TLB size    : 1536 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro acc_power [13]

Minimal supported frequence is 1400000. Max turbo core is 3600000.

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
2700000 2300000 1800000 1400000

But amdctl says that lowest state is 5. But 5 is 

 sudo amdctl -g -c0
[sudo] пароль для alsoijw: 
Voltage ID encodings: SVI (serial)
Detected CPU model 65h, from family 15h with 4 CPU cores.

Core 0 | P-State Limits (non-turbo): Highest: 1 ; Lowest 5 | Current P-State: 4
 Pstate Status CpuFid CpuDid CpuVid CpuMult CpuFreq CpuVolt IddVal IddDiv CpuCurr CpuPower
      0      1     20      0     28  18.00x 3600MHz  1200mV    145     10  14.50A   17.40W
      1      1     16      0     54  16.00x 3200MHz   875mV    107     10  10.70A    9.36W
      2      1     13      0     70  14.50x 2900MHz   675mV     87     10   8.70A    5.87W
      3      1     11      0     78  13.50x 2700MHz   575mV     77     10   7.70A    4.43W
      4      1      7      0     96  11.50x 2300MHz   350mV     58     10   5.80A    2.03W
      5      1     20      1    110   9.00x 1800MHz   175mV     42     10   4.20A    0.73W
current      1     12      1    118   7.00x 1400MHz    75mV
Northbridge:
P-State 0: 104 (vid),   250mV, 1100MHz
P-State 1: 108 (vid),   200mV, 1000MHz
P-State 2: 108 (vid),   200mV, 1000MHz
P-State 3: 124 (vid),     0mV, 700MHz

I can manually get information about 6 state.

 sudo amdctl -g -c0 -p6
Voltage ID encodings: SVI (serial)
Detected CPU model 65h, from family 15h with 4 CPU cores.

Core 0 | P-State Limits (non-turbo): Highest: 1 ; Lowest 5 | Current P-State: 3
 Pstate Status CpuFid CpuDid CpuVid CpuMult CpuFreq CpuVolt IddVal IddDiv CpuCurr CpuPower
      6      1     12      1    118   7.00x 1400MHz    75mV     32     10   3.20A    0.24W
current      1     20      1     70   9.00x 1800MHz   675mV
Northbridge:
P-State 0: 104 (vid),   250mV, 1100MHz
P-State 1: 108 (vid),   200mV, 1000MHz
P-State 2: 108 (vid),   200mV, 1000MHz
P-State 3: 124 (vid),     0mV, 700MHz

If I continue iterate states I will get

$  sudo amdctl -g -c0 -p7
Voltage ID encodings: SVI (serial)
Detected CPU model 65h, from family 15h with 4 CPU cores.

Core 0 | P-State Limits (non-turbo): Highest: 1 ; Lowest 5 | Current P-State: 4
 Pstate Status CpuFid CpuDid CpuVid CpuMult CpuFreq CpuVolt IddVal IddDiv CpuCurr CpuPower
      7      0      0      1      0   4.00x  800MHz  1550mV    202    100   2.02A    3.13W
current      1     12      1    110   7.00x 1400MHz   175mV
Northbridge:
P-State 0: 104 (vid),   250mV, 1100MHz
P-State 1: 108 (vid),   200mV, 1000MHz
P-State 2: 108 (vid),   200mV, 1000MHz
P-State 3: 124 (vid),     0mV, 700MHz

I don't know is it 7 state correct or not.

wmarkow commented 5 years ago

@alsoijw, those AMD processors have a possibility to have at most 8 P-States, however not all of them may be available, it depends on the specific processor itself. It looks like amdctl tool is able to read all of them, no matter if they are valid.

In your example the state 7 is not valid because its Status is 0. I also think that there is a small bug in amdctl. If you execute amdctl -x then it shows the explanation of the fields and for status we have:

Status:      If the P-State is enabled (1) or disabled (0).

however this message is wrong. According to the specs for 14H family and 15H family models 60h-6Fh the meaning of this field is:

PstateEn. Read-write. 1=The P-state specified by this MSR is valid. 0=The P-state specified by this MSR is not valid. The purpose of this register is to indicate if the rest of the P-state information in the register is valid after a reset; it controls no hardware.

The status message should be something like:

Status:      If the P-State is valid (1) or invalid (0).
wmarkow commented 5 years ago

I'm not quite sure if amdctl correctly distinguish between non-turbo and turbo P-States. Probably it silently assumes that there is always one turbo state, which may be wrong. Some processors may have 0, 1 or more turbo states. According to specs, the D18F4x15C register contains the number of turbo (or boosted) states but this registers is never read by amdctl.

@alsoijw, I have the feeling that you processor has 7 P-States in total. The first three (with speeds 3600MHz, 3200MHz and 2900Mhz) are the boost states. The other ones are a non-boosted. So the list of pstates is not correct, it should be something like this:

Core 0 | P-State Limits (non-turbo): Highest: 3 ; Lowest 6 | Current P-State: 6
 Pstate Status CpuFid CpuDid CpuVid CpuMult CpuFreq CpuVolt IddVal IddDiv CpuCurr CpuPower
      0      1     20      0     28  18.00x 3600MHz  1200mV    145     10  14.50A   17.40W Turbo
      1      1     16      0     54  16.00x 3200MHz   875mV    107     10  10.70A    9.36W Turbo
      2      1     13      0     70  14.50x 2900MHz   675mV     87     10   8.70A    5.87W Turbo
      3      1     11      0     78  13.50x 2700MHz   575mV     77     10   7.70A    4.43W
      4      1      7      0     96  11.50x 2300MHz   350mV     58     10   5.80A    2.03W
      5      1     20      1    110   9.00x 1800MHz   175mV     42     10   4.20A    0.73W
      6      1     12      1    118   7.00x 1400MHz    75mV     32     10   3.20A    0.24W
current      1     12      1    118   7.00x 1400MHz    75mV
wmarkow commented 5 years ago

How to read prom PCI devices, for example D18F4x15C I have described in #16.