linux-kernel - Re: [PATCH] selftests:intel_pstate: fixes typical crash of a testing script for Intel P-State driver

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Date:   Tue, 8 May 2018 14:21:11 -0600
From:   Shuah Khan <shuah@...nel.org>
To:     Jeffrin Jose T <ahiliation@...oo.co.in>,
        kstewart@...uxfoundation.org, daniel.diaz@...aro.org,
        pombredanne@...b.com, gregkh@...uxfoundation.org, thomas@...3r.de
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jeffrin Jose T <jeffrin@...agiritech.edu.in>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH] selftests:intel_pstate: fixes typical crash of a testing
 script for Intel P-State driver

On 05/04/2018 01:47 PM, Shuah Khan wrote:
> On 04/29/2018 01:12 PM, Jeffrin Jose T wrote:
>>  Testing script for Intel P-State driver crashes during
>>  the run.  this patch fixes that crash and produce typical results.
>>
>> Signed-off-by: Jeffrin Jose T <jeffrin@...agiritech.edu.in>
>>
>> ---
>>  tools/testing/selftests/intel_pstate/run.sh | 7 +++++--
>>  1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh
>> index c670359becc6..cd32aca8806f 100755
>> --- a/tools/testing/selftests/intel_pstate/run.sh
>> +++ b/tools/testing/selftests/intel_pstate/run.sh
>> @@ -27,6 +27,7 @@
>>  # and the test will error out in those cases.  The result.X file can be checked
>>  # for consistency and modified to remove the extra MHz values.  The result.X
>>  # files can be re-evaluated by setting EVALUATE_ONLY to 1 below.
>> +#set -xv
>>  
>>  EVALUATE_ONLY=0
>>  
>> @@ -101,12 +102,13 @@ cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
>>  echo "Target      Actual      Difference     MSR(0x199)     max_perf_pct"
>>  for freq in `seq $max_freq -100 $min_freq`
>>  do
>> -	result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')
>> +       result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" \
>>         | awk '{print $4}' | awk -F "." '{print $1}')
>> +	result_freq=$(echo $result_freq | head -n1 | cut -d " " -f1)
>>  	msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
>>  	max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
>> -	if [ $result_freq -eq $freq ]; then
>> +	if (( "$result_freq" == "$freq" ))
>> +	then
>>  		echo " $freq        $result_freq             0          $msr         $(($max_perf_pct*3300))"
>>  	else
>>  		echo " $freq        $result_freq          $(($result_freq-$freq))          $msr          $(($max_perf_pct*$max_freq))"
>>
> 
> Thanks. I will get this into 4.17-rc5
> 
> -- Shuah
> 

This patch didn't apply. In any case Daniel Diaz sent in a patch a coupld of weeks ago
which did apply and fixes the same problem.

I applied Daniel's patch to linux-kselftest fixes for 4.17-rc5

https://lists.linaro.org/pipermail/linux-kselftest-mirror/2018-April/000858.html

thank you both.

-- Shuah