tools/power turbostat: Add reading aperf and mperf via perf API

Browse source

By using the perf API we spend less time in between the reads of the
counters, resulting in more accurate calculations of the dependent
metrics.

Using perf API is also usually faster overall, although cache miss, if
we get one, is more costly when using perf vs MSR driver.

We would fallback to the msr reads if the sysfs isn't there or when in
--no-perf mode.

Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

...

This commit is contained in:

Patryk Wlazlyn 2024-01-11 16:42:22 +01:00 • committed by Len Brown

parent a0e86c90b8

commit e48934c9f1

1 changed files with 301 additions and 73 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

374

tools/power/x86/turbostat/turbostat.c

View file