129 lines
4 KiB
Bash
Executable file
129 lines
4 KiB
Bash
Executable file
#!/bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# This test runs on Intel x86 based hardware which support the intel_pstate
|
|
# driver. The test checks the frequency settings from the maximum turbo
|
|
# state to the minimum supported frequency, in decrements of 100MHz. The
|
|
# test runs the aperf.c program to put load on each processor.
|
|
#
|
|
# 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
|
|
#
|
|
# Notes: In some cases several frequency values may be placed in the
|
|
# /tmp/result.X files. This is done on purpose in order to catch cases
|
|
# where the pstate driver may not be working at all. There is the case
|
|
# where, for example, several "similar" frequencies are in the file:
|
|
#
|
|
#
|
|
#/tmp/result.3100:1:cpu MHz : 2899.980
|
|
#/tmp/result.3100:2:cpu MHz : 2900.000
|
|
#/tmp/result.3100:3:msr 0x199: 0x1e00
|
|
#/tmp/result.3100:4:max_perf_pct 94
|
|
#
|
|
# 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.
|
|
|
|
EVALUATE_ONLY=0
|
|
|
|
# Kselftest framework requirement - SKIP code is 4.
|
|
ksft_skip=4
|
|
|
|
if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
|
|
echo "$0 # Skipped: Test can only run on x86 architectures."
|
|
exit $ksft_skip
|
|
fi
|
|
|
|
msg="skip all tests:"
|
|
if [ $UID != 0 ] && [ $EVALUATE_ONLY == 0 ]; then
|
|
echo $msg please run this as root >&2
|
|
exit $ksft_skip
|
|
fi
|
|
|
|
max_cpus=$(($(nproc)-1))
|
|
|
|
function run_test () {
|
|
|
|
file_ext=$1
|
|
for cpu in `seq 0 $max_cpus`
|
|
do
|
|
echo "launching aperf load on $cpu"
|
|
./aperf $cpu &
|
|
done
|
|
|
|
echo "sleeping for 5 seconds"
|
|
sleep 5
|
|
grep MHz /proc/cpuinfo | sort -u > /tmp/result.freqs
|
|
num_freqs=$(wc -l /tmp/result.freqs | awk ' { print $1 } ')
|
|
if [ $num_freqs -ge 2 ]; then
|
|
tail -n 1 /tmp/result.freqs > /tmp/result.$1
|
|
else
|
|
cp /tmp/result.freqs /tmp/result.$1
|
|
fi
|
|
./msr 0 >> /tmp/result.$1
|
|
|
|
max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)
|
|
echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1
|
|
|
|
for job in `jobs -p`
|
|
do
|
|
echo "waiting for job id $job"
|
|
wait $job
|
|
done
|
|
}
|
|
|
|
#
|
|
# MAIN (ALL UNITS IN MHZ)
|
|
#
|
|
|
|
# Get the marketing frequency
|
|
_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}')
|
|
_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:])
|
|
mkt_freq=${_mkt_freq}0
|
|
|
|
# Get the ranges from cpupower
|
|
_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ')
|
|
min_freq=$(($_min_freq / 1000))
|
|
_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ')
|
|
max_freq=$(($_max_freq / 1000))
|
|
|
|
|
|
[ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq`
|
|
do
|
|
echo "Setting maximum frequency to $freq"
|
|
cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null
|
|
run_test $freq
|
|
done
|
|
|
|
[ $EVALUATE_ONLY -eq 0 ] && cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
|
|
|
|
echo "========================================================================"
|
|
echo "The marketing frequency of the cpu is $mkt_freq MHz"
|
|
echo "The maximum frequency of the cpu is $max_freq MHz"
|
|
echo "The minimum frequency of the cpu is $min_freq MHz"
|
|
|
|
# make a pretty table
|
|
echo "Target Actual Difference MSR(0x199) max_perf_pct" | tr " " "\n" > /tmp/result.tab
|
|
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 $1 } ')
|
|
msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
|
|
max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
|
|
cat >> /tmp/result.tab << EOF
|
|
$freq
|
|
$result_freq
|
|
$((result_freq - freq))
|
|
$msr
|
|
$((max_perf_pct * max_freq))
|
|
EOF
|
|
done
|
|
|
|
# print the table
|
|
pr -aTt -5 < /tmp/result.tab
|
|
|
|
exit 0
|