leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'pm-tools'

Browse Source 
Merge power management utilities changes for 5.18-rc1:

 - Add tracer tool for the amd-pstate driver (Jinzhou Su).

 - Fix PC6 displaying in turbostat on some systems (Artem Bityutskiy).

 - Add AMD P-State support to the cpupower utility (Huang Rui).

* pm-tools:
  Documentation: amd-pstate: add tracer tool introduction
  tools/power/x86/amd_pstate_tracer: Add tracer tool for AMD P-state
  tools/power/x86/intel_pstate_tracer: make tracer as a module
  cpufreq: amd-pstate: Add more tracepoint for AMD P-State module
  turbostat: fix PC6 displaying on some systems
  cpupower: Add "perf" option to print AMD P-State information
  cpupower: Add function to print AMD P-State performance capabilities
  cpupower: Move print_speed function into misc helper
  cpupower: Enable boost state support for AMD P-State module
  cpupower: Add AMD P-State sysfs definition and access helper
  cpupower: Introduce ACPI CPPC library
  cpupower: Add the function to get the sysfs value from specific table
  cpupower: Initial AMD P-State capability
  cpupower: Add the function to check AMD P-State enabled
  cpupower: Add AMD P-State capability flag
  tools/power/cpupower/{ToDo => TODO}: Rename the todo file
  tools: cpupower: fix typo in cpupower-idle-set(1) manpage
This commit is contained in:
Rafael J. Wysocki
2022-03-18 18:46:15 +01:00
parent ac9f31096b b020771a66
commit ec3d8b8365
20 changed files with 897 additions and 184 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
Documentation/admin-guide/pm/amd-pstate.rst
View File

@@ -369,6 +369,32 @@ governor (for the policies it is attached to), or by the ``CPUFreq`` core (for t
policies with other scaling governors).
Tracer Tool
-------------
``amd_pstate_tracer.py`` can record and parse ``amd-pstate`` trace log, then
generate performance plots. This utility can be used to debug and tune the
performance of ``amd-pstate`` driver. The tracer tool needs to import intel
pstate tracer.
Tracer tool located in ``linux/tools/power/x86/amd_pstate_tracer``. It can be
used in two ways. If trace file is available, then directly parse the file
with command ::
./amd_pstate_trace.py [-c cpus] -t <trace_file> -n <test_name>
Or generate trace file with root privilege, then parse and plot with command ::
sudo ./amd_pstate_trace.py [-c cpus] -n <test_name> -i <interval> [-m kbytes]
The test result can be found in ``results/test_name``. Following is the example
about part of the output. ::
common_cpu common_secs common_usecs min_perf des_perf max_perf freq mperf apef tsc load duration_ms sample_num elapsed_time common_comm
CPU_005 712 116384 39 49 166 0.7565 9645075 2214891 38431470 25.1 11.646 469 2.496 kworker/5:0-40
CPU_006 712 116408 39 49 166 0.6769 8950227 1839034 37192089 24.06 11.272 470 2.496 kworker/6:0-1264
Reference
===========