Re: [RFC v2 2/2] selftest/cpuidle: Add support for cpuidle latency measurement

[Doug Smythies]

Hi Pratik,

On Thu, Apr 1, 2021 at 4:45 AM Pratik Rajesh Sampat
<psampat@xxxxxxxxxxxxx> wrote:
>
...

> To run this test specifically:
> $ make -C tools/testing/selftests TARGETS="cpuidle" run_tests

I have not become any smarter than I was with version 1,
and still assumed that the "$" meant regular user.
Please put it as "#" or separate the two steps, compile and run.

>
> There are a few optinal arguments too that the script can take

optional

Suggest to also specifically mention how to run without re-compile,

# ./cpuidle.sh -v

Note also that the test still leaves all idle states disabled when done.

>         [-h <help>]
>         [-i <run timer tests>]
>         [-m <location of the module>]
>         [-o <location of the output>]
>         [-v <verbose> (run on all cpus)]
> Default Output location in: tools/testing/selftest/cpuidle/cpuidle.log

...

> +cpu_is_online()
> +{
> +       cpu=$1
> +       if [ ! -f "/sys/devices/system/cpu/cpu$cpu/online" ]; then
> +               echo 0

incorrect. should be:

> +               echo 1

... Doug