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1#!/bin/bash
2#
3# This test runs on Intel x86 based hardware which support the intel_pstate
4# driver. The test checks the frequency settings from the maximum turbo
5# state to the minimum supported frequency, in decrements of 100MHz. The
6# test runs the aperf.c program to put load on each processor.
7#
8# The results are displayed in a table which indicate the "Target" state,
9# or the requested frequency in MHz, the Actual frequency, as read from
10# /proc/cpuinfo, the difference between the Target and Actual frequencies,
11# and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what
12# pstate the cpu is in, and the value of
13# /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state
14#
15# Notes: In some cases several frequency values may be placed in the
16# /tmp/result.X files. This is done on purpose in order to catch cases
17# where the pstate driver may not be working at all. There is the case
18# where, for example, several "similar" frequencies are in the file:
19#
20#
21#/tmp/result.3100:1:cpu MHz : 2899.980
22#/tmp/result.3100:2:cpu MHz : 2900.000
23#/tmp/result.3100:3:msr 0x199: 0x1e00
24#/tmp/result.3100:4:max_perf_pct 94
25#
26# and the test will error out in those cases. The result.X file can be checked
27# for consistency and modified to remove the extra MHz values. The result.X
28# files can be re-evaluated by setting EVALUATE_ONLY to 1 below.
29
30EVALUATE_ONLY=0
31
32max_cpus=$(($(nproc)-1))
33
34# compile programs
35gcc aperf.c -Wall -D_GNU_SOURCE -o aperf -lm
36[ $? -ne 0 ] && echo "Problem compiling aperf.c." && exit 1
37gcc -o msr msr.c -lm
38[ $? -ne 0 ] && echo "Problem compiling msr.c." && exit 1
39
40function run_test () {
41
42 file_ext=$1
43 for cpu in `seq 0 $max_cpus`
44 do
45 echo "launching aperf load on $cpu"
46 ./aperf $cpu &
47 done
48
49 echo "sleeping for 5 seconds"
50 sleep 5
51 num_freqs=$(cat /proc/cpuinfo | grep MHz | sort -u | wc -l)
52 if [ $num_freqs -le 2 ]; then
53 cat /proc/cpuinfo | grep MHz | sort -u | tail -1 > /tmp/result.$1
54 else
55 cat /proc/cpuinfo | grep MHz | sort -u > /tmp/result.$1
56 fi
57 ./msr 0 >> /tmp/result.$1
58
59 max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)
60 echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1
61
62 for job in `jobs -p`
63 do
64 echo "waiting for job id $job"
65 wait $job
66 done
67}
68
69#
70# MAIN (ALL UNITS IN MHZ)
71#
72
73# Get the marketing frequency
74_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}')
75_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:])
76mkt_freq=${_mkt_freq}0
77
78# Get the ranges from cpupower
79_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ')
80min_freq=$(($_min_freq / 1000))
81_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ')
82max_freq=$(($_max_freq / 1000))
83
84
85for freq in `seq $max_freq -100 $min_freq`
86do
87 echo "Setting maximum frequency to $freq"
88 cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null
89 [ $EVALUATE_ONLY -eq 0 ] && run_test $freq
90done
91
92echo "=============================================================================="
93
94echo "The marketing frequency of the cpu is $mkt_freq MHz"
95echo "The maximum frequency of the cpu is $max_freq MHz"
96echo "The minimum frequency of the cpu is $min_freq MHz"
97
98cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
99
100# make a pretty table
101echo "Target Actual Difference MSR(0x199) max_perf_pct"
102for freq in `seq $max_freq -100 $min_freq`
103do
104 result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')
105 msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
106 max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
107 if [ $result_freq -eq $freq ]; then
108 echo " $freq $result_freq 0 $msr $(($max_perf_pct*3300))"
109 else
110 echo " $freq $result_freq $(($result_freq-$freq)) $msr $(($max_perf_pct*$max_freq))"
111 fi
112done
113exit 0
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# This test runs on Intel x86 based hardware which support the intel_pstate
5# driver. The test checks the frequency settings from the maximum turbo
6# state to the minimum supported frequency, in decrements of 100MHz. The
7# test runs the aperf.c program to put load on each processor.
8#
9# The results are displayed in a table which indicate the "Target" state,
10# or the requested frequency in MHz, the Actual frequency, as read from
11# /proc/cpuinfo, the difference between the Target and Actual frequencies,
12# and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what
13# pstate the cpu is in, and the value of
14# /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state
15#
16# Notes: In some cases several frequency values may be placed in the
17# /tmp/result.X files. This is done on purpose in order to catch cases
18# where the pstate driver may not be working at all. There is the case
19# where, for example, several "similar" frequencies are in the file:
20#
21#
22#/tmp/result.3100:1:cpu MHz : 2899.980
23#/tmp/result.3100:2:cpu MHz : 2900.000
24#/tmp/result.3100:3:msr 0x199: 0x1e00
25#/tmp/result.3100:4:max_perf_pct 94
26#
27# and the test will error out in those cases. The result.X file can be checked
28# for consistency and modified to remove the extra MHz values. The result.X
29# files can be re-evaluated by setting EVALUATE_ONLY to 1 below.
30
31EVALUATE_ONLY=0
32
33# Kselftest framework requirement - SKIP code is 4.
34ksft_skip=4
35
36if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
37 echo "$0 # Skipped: Test can only run on x86 architectures."
38 exit $ksft_skip
39fi
40
41msg="skip all tests:"
42if [ $UID != 0 ] && [ $EVALUATE_ONLY == 0 ]; then
43 echo $msg please run this as root >&2
44 exit $ksft_skip
45fi
46
47max_cpus=$(($(nproc)-1))
48
49function run_test () {
50
51 file_ext=$1
52 for cpu in `seq 0 $max_cpus`
53 do
54 echo "launching aperf load on $cpu"
55 ./aperf $cpu &
56 done
57
58 echo "sleeping for 5 seconds"
59 sleep 5
60 grep MHz /proc/cpuinfo | sort -u > /tmp/result.freqs
61 num_freqs=$(wc -l /tmp/result.freqs | awk ' { print $1 } ')
62 if [ $num_freqs -ge 2 ]; then
63 tail -n 1 /tmp/result.freqs > /tmp/result.$1
64 else
65 cp /tmp/result.freqs /tmp/result.$1
66 fi
67 ./msr 0 >> /tmp/result.$1
68
69 max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)
70 echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1
71
72 for job in `jobs -p`
73 do
74 echo "waiting for job id $job"
75 wait $job
76 done
77}
78
79#
80# MAIN (ALL UNITS IN MHZ)
81#
82
83# Get the marketing frequency
84_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}')
85_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:])
86mkt_freq=${_mkt_freq}0
87
88# Get the ranges from cpupower
89_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ')
90min_freq=$(($_min_freq / 1000))
91_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ')
92max_freq=$(($_max_freq / 1000))
93
94
95[ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq`
96do
97 echo "Setting maximum frequency to $freq"
98 cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null
99 run_test $freq
100done
101
102[ $EVALUATE_ONLY -eq 0 ] && cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
103
104echo "========================================================================"
105echo "The marketing frequency of the cpu is $mkt_freq MHz"
106echo "The maximum frequency of the cpu is $max_freq MHz"
107echo "The minimum frequency of the cpu is $min_freq MHz"
108
109# make a pretty table
110echo "Target Actual Difference MSR(0x199) max_perf_pct" | tr " " "\n" > /tmp/result.tab
111for freq in `seq $max_freq -100 $min_freq`
112do
113 result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')
114 msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
115 max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
116 cat >> /tmp/result.tab << EOF
117$freq
118$result_freq
119$((result_freq - freq))
120$msr
121$((max_perf_pct * max_freq))
122EOF
123done
124
125# print the table
126pr -aTt -5 < /tmp/result.tab
127
128exit 0