Provided by: psst_0.1-4_amd64 
NAME
psst - Power Stress and Shaping Tool
SYNOPSIS
psst [options <value>]
DESCRIPTION
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.
OPTIONS
-C --cpumask CPUMASK
CPUMASK is hexadecimal bit mask of cpu selected. (e.g., a1 selects cpu 0, 5, 7. default: every
online cpu, maximum 1024)
-p --poll-period pollperiod
pollperiod specifies period for logging in milliseconds (default 500 ms)
-d --duration m
specifies duration m in milliseconds to run psst (default is 3600000; 1 hour)
-l --log-file path
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-func shape-func,arg
Specifies power shape function and argument:
Shape Function Argument
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)%
EXAMPLES
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
AUTHOR
Started by Noor Mubeen
COPYRIGHT
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)