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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9070ee31ab
The intel_pstate related testing script need root level privileges when trying to access certain file for the successful execution of the script.But this is not the case always like when using evaluation only mode, which only require user level privilege. This patch is to notify the user about the privilege the script demands for the successful execution of the test. Signed-off-by: Jeffrin Jose T (Rajagiri SET) <ahiliation@gmail.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
129 lines
4.0 KiB
Bash
Executable File
129 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# This test runs on Intel x86 based hardware which support the intel_pstate
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# driver. The test checks the frequency settings from the maximum turbo
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# state to the minimum supported frequency, in decrements of 100MHz. The
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# test runs the aperf.c program to put load on each processor.
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#
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# The results are displayed in a table which indicate the "Target" state,
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# or the requested frequency in MHz, the Actual frequency, as read from
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# /proc/cpuinfo, the difference between the Target and Actual frequencies,
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# and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what
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# pstate the cpu is in, and the value of
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# /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state
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#
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# Notes: In some cases several frequency values may be placed in the
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# /tmp/result.X files. This is done on purpose in order to catch cases
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# where the pstate driver may not be working at all. There is the case
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# where, for example, several "similar" frequencies are in the file:
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#
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#
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#/tmp/result.3100:1:cpu MHz : 2899.980
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#/tmp/result.3100:2:cpu MHz : 2900.000
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#/tmp/result.3100:3:msr 0x199: 0x1e00
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#/tmp/result.3100:4:max_perf_pct 94
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#
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# and the test will error out in those cases. The result.X file can be checked
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# for consistency and modified to remove the extra MHz values. The result.X
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# files can be re-evaluated by setting EVALUATE_ONLY to 1 below.
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EVALUATE_ONLY=0
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
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echo "$0 # Skipped: Test can only run on x86 architectures."
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exit $ksft_skip
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fi
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msg="skip all tests:"
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if [ $UID != 0 ] && [ $EVALUATE_ONLY == 0 ]; then
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echo $msg please run this as root >&2
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exit $ksft_skip
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fi
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max_cpus=$(($(nproc)-1))
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function run_test () {
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file_ext=$1
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for cpu in `seq 0 $max_cpus`
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do
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echo "launching aperf load on $cpu"
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./aperf $cpu &
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done
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echo "sleeping for 5 seconds"
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sleep 5
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grep MHz /proc/cpuinfo | sort -u > /tmp/result.freqs
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num_freqs=$(wc -l /tmp/result.freqs | awk ' { print $1 } ')
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if [ $num_freqs -ge 2 ]; then
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tail -n 1 /tmp/result.freqs > /tmp/result.$1
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else
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cp /tmp/result.freqs /tmp/result.$1
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fi
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./msr 0 >> /tmp/result.$1
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max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)
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echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1
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for job in `jobs -p`
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do
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echo "waiting for job id $job"
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wait $job
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done
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}
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#
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# MAIN (ALL UNITS IN MHZ)
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#
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# Get the marketing frequency
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_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}')
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_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:])
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mkt_freq=${_mkt_freq}0
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# Get the ranges from cpupower
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_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ')
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min_freq=$(($_min_freq / 1000))
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_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ')
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max_freq=$(($_max_freq / 1000))
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[ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq`
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do
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echo "Setting maximum frequency to $freq"
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cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null
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run_test $freq
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done
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[ $EVALUATE_ONLY -eq 0 ] && cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
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echo "========================================================================"
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echo "The marketing frequency of the cpu is $mkt_freq MHz"
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echo "The maximum frequency of the cpu is $max_freq MHz"
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echo "The minimum frequency of the cpu is $min_freq MHz"
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# make a pretty table
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echo "Target Actual Difference MSR(0x199) max_perf_pct" | tr " " "\n" > /tmp/result.tab
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for freq in `seq $max_freq -100 $min_freq`
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do
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result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')
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msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
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max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
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cat >> /tmp/result.tab << EOF
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$freq
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$result_freq
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$((result_freq - freq))
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$msr
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$((max_perf_pct * max_freq))
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EOF
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done
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# print the table
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pr -aTt -5 < /tmp/result.tab
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exit 0
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