linux-stable.git/tools/testing/selftests/intel_pstate, branch linux-4.9.y

selftests/intel_pstate: Improve test, minor fixes

2018-08-03T05:55:15+00:00

[ Upstream commit e9d33f149f52981fd856a0b16aa8ebda89b02e34 ]

A few changes improve the overall usability of the test:
* fix a hard-coded maximum frequency (3300),
* don't adjust the CPU frequency if only evaluating results,
* fix a comparison for multiple frequencies.

A symptom of that last issue looked like this:
  ./run.sh: line 107: [: too many arguments
  ./run.sh: line 110: 3099
  3099
  3100-3100: syntax error in expression (error token is \"3099
  3100-3100\")

Because a check will count how many differente frequencies
there are among the CPUs of the system, and after they are
tallied another read is performed, which might produce
different results.

Signed-off-by: Daniel Díaz 
Signed-off-by: Shuah Khan (Samsung OSG) 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

tools: testing: define the _GNU_SOURCE macro

2016-05-16T15:06:17+00:00

Add the macro _GNU_SOURCE, to fix CPU_ZERO and CPU_SET undefined compile
errors.

Signed-off-by: Muhammad Falak R Wani 
Signed-off-by: Shuah Khan

tools, testing, add test for intel_pstate driver

2015-11-23T20:30:59+00:00

This test used the cpupower utility to set the cpu frequency from the
maximum turbo value to the minimum supported value in steps of 100 MHz.

The results are displayed in a table which indicate the "Target" state,
or the requested frequency in MHz, the Actual frequency, as read from
/proc/cpuinfo, the difference between the Target and Actual frequencies,
and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what
pstate the cpu is in, and the value of
/sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state

Cc: Shuah Khan 
Cc: linux-api@vger.kernel.org
Signed-off-by: Prarit Bhargava 
Signed-off-by: Shuah Khan