psst - Power Stress and Shaping Tool

       Started by Noor Mubeen

       Copyright © 2017, Intel Corporation License GPLv2: GNU GPL version 2
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to  the  extent
       permitted  by  law.   Or,  say,  there  is  NO  warranty;  not  even for MERCHANTABILITY or FITNESS FOR A
       PARTICULAR PURPOSE.

                                                November 28, 2017                                        PSST(1)

       The  Power  Stress and Shaping Tool (PSST) is a controlled power 'virus' for Intel SoC components such as
       CPU and GPU.
       The objective is to subject the SoC at different run-time-varying utilization levels for  analysis.  This
       is  done by controlled duty-cycling of utilization to specific contour. A simplest contour could be fixed
       low utilization. This allows simple usage, such as logging of system parameters  at  fixed  low  overhead
       even  at  small polling intervals (ms). More complex usage, such as study of governors, workloads e.t.c.,
       are possible by applying different power shape contours and options.

       1.  Use psst just for logging various power/thermal parameters:
               sudo psst  # same as $./psst -s single-step,0.1 -p 500 -v

       2.  Linear  ramp  CPU  power  with  slope 3% usage-per-sec applied for cpu 1 and 3, polling and reporting
           every 700mS, output on termial, running for 33 seconds:
               sudo psst -s linear-ramp,3 -C a -p 700 -d 33000 -v

       psst - Power Stress and Shaping Tool

-C--cpumaskCPUMASK
              CPUMASK is hexadecimal bit mask of cpu selected. (e.g., a1 selects cpu 0,  5,  7.  default:  every
              online cpu, maximum 1024)

       -p--poll-periodpollperiod
              pollperiod specifies period for logging in milliseconds (default 500 ms)

       -d--durationm
              specifies duration m in milliseconds to run psst (default is 3600000; 1 hour)

       -l--log-filepath
              specifies the full path to the logfile (default is /var/log/psst.csv)

       -v--verbose
              enables verbose mode (default: disabled when args specified)

       -V--version
              prints version

       -T--track-max-cpu
              Track the cpu# with maxed freq during poll period

       -h--help
              prints help

       -s--shape-funcshape-func,arg
              Specifies power shape function and argument:
              ShapeFunctionArgument
              single-step,v              where v is load step height [C0%]. (default shape: single-step,0.1)
              sinosoid,w,a               where w is wavelength [seconds] and a is the amplitude (max load %)
              stair-case,v,u             where v is load step height [C0%], u is step length (sec)
              single-pulse,v,u           where v is load step height [C0%], u is step length (sec)
              linear-ramp,m              where m is the slope (load/sec)
              saw-tooth,m,a              slope m (load/sec); reversed after max a% or min(0.1)%

psst[options<value>]