linux-stable.git/tools/testing/selftests/intel_pstate, branch v4.13.2

selftests: intel_pstate: add .gitignore

2017-06-30T16:06:24+00:00

Add .gitignore for generated files.

Signed-off-by: Shuah Khan

selftest/intel_pstate/aperf: Use LDLIBS instead of LDFLAGS

2017-06-23T19:35:08+00:00

Build of aperf fails as below:
```
gcc  -Wall -D_GNU_SOURCE   -lm  aperf.c  -o /tools/testing/selftests/intel_pstate/aperf
/tmp/ccKf3GF6.o: In function `main':
aperf.c:(.text+0x278): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
```

The faulure occurs because -lm was defined as LDFLAGS and implicit rule
of make places LDFLAGS before source file.  This commit fixes the
problem by using LDLIBS instead of LDFLAGS.

Signed-off-by: SeongJae Park 
Signed-off-by: Shuah Khan

selftests/intel_pstate: Update makefile to match new style

2017-01-19T17:30:40+00:00

Recent changes from Bamvor (88baa78d1f318) have standardized the
variable names like TEST_GEN_FILES and removed the need for make targets
all and clean.

These changes bring the intel_pstate test inline with those changes.

Cc: Prarit Bhargava 
Signed-off-by: Stafford Horne 
Signed-off-by: Shuah Khan

selftests/intel_pstate: Fix warning on loop index overflow

2017-01-19T17:30:34+00:00

The build was showing the warning:
 aperf.c:60:27: warning: iteration 2147483647 invokes undefined behavior
 [-Waggressive-loop-optimizations]
  for (i=0; i<0x8fffffff; i++) {

This change sets i, cpu and fd to unsigned int as they should not need
to be signed.

Cc: Prarit Bhargava 
Signed-off-by: Stafford Horne 
Signed-off-by: Shuah Khan

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