xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tools/power turbostat: on SIGUSR1: sample, print and continue

Browse Source 
Interval-mode turbostat now catches and discards SIGUSR1.

Thus, SIGUSR1 can be used to tell turbostat to cut short
the current measurement interval.  Turbostat will then start
the next measurement interval using the regular interval length.

This can be used to give turbostat variable intervals.
Invoke turbostat with --interval LARGE_NUMBER_SEC
and have a program that has permission to send it a SIGUSR1
always before LARGE_NUMBER_SEC expires.

It may also be useful to use "--enable Time_Of_Day_Seconds"
to observe the actual interval length.

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown
2017-07-15 15:51:26 -04:00
parent 8aa2ed0b28
commit 072119606a
2 changed files with 10 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
tools/power/x86/turbostat/turbostat.8
View File

@@ -271,6 +271,10 @@ CPU PRF_CTRL
SIGINT will interrupt interval-mode.
The end-of-interval data will be collected and displayed before turbostat exits.
SIGUSR1 will end current interval,
end-of-interval data will be collected and displayed before turbostat
starts a new interval.
.SH NOTES
.B "turbostat "