1#!/bin/sh 2# perf stat metrics (shadow stat) test 3# SPDX-License-Identifier: GPL-2.0 4 5set -e 6 7THRESHOLD=0.015 8 9# skip if system-wide mode is forbidden 10perf stat -a true > /dev/null 2>&1 || exit 2 11 12# skip if on hybrid platform 13perf stat -a -e cycles sleep 1 2>&1 | grep -e cpu_core && exit 2 14 15test_global_aggr() 16{ 17 perf stat -a --no-big-num -e cycles,instructions sleep 1 2>&1 | \ 18 grep -e cycles -e instructions | \ 19 while read num evt _ ipc rest 20 do 21 # skip not counted events 22 if [ "$num" = "<not" ]; then 23 continue 24 fi 25 26 # save cycles count 27 if [ "$evt" = "cycles" ]; then 28 cyc=$num 29 continue 30 fi 31 32 # skip if no cycles 33 if [ -z "$cyc" ]; then 34 continue 35 fi 36 37 # use printf for rounding and a leading zero 38 res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'` 39 if [ "$ipc" != "$res" ]; then 40 # check the difference from the real result for FP imperfections 41 diff=`echo $ipc $res $THRESHOLD | \ 42 awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'` 43 44 if [ $diff -eq 1 ]; then 45 echo "IPC is different: $res != $ipc ($num / $cyc)" 46 exit 1 47 fi 48 49 echo "Warning: Difference of IPC is under the threshold" 50 fi 51 done 52} 53 54test_no_aggr() 55{ 56 perf stat -a -A --no-big-num -e cycles,instructions sleep 1 2>&1 | \ 57 grep ^CPU | \ 58 while read cpu num evt _ ipc rest 59 do 60 # skip not counted events 61 if [ "$num" = "<not" ]; then 62 continue 63 fi 64 65 # save cycles count 66 if [ "$evt" = "cycles" ]; then 67 results="$results $cpu:$num" 68 continue 69 fi 70 71 cyc=${results##* $cpu:} 72 cyc=${cyc%% *} 73 74 # skip if no cycles 75 if [ -z "$cyc" ]; then 76 continue 77 fi 78 79 # use printf for rounding and a leading zero 80 res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'` 81 if [ "$ipc" != "$res" ]; then 82 # check difference from the real result for FP imperfections 83 diff=`echo $ipc $res $THRESHOLD | \ 84 awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'` 85 86 if [ $diff -eq 1 ]; then 87 echo "IPC is different: $res != $ipc ($num / $cyc)" 88 exit 1 89 fi 90 91 echo "Warning: Difference of IPC is under the threshold" 92 fi 93 done 94} 95 96test_global_aggr 97test_no_aggr 98 99exit 0 100