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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100#!/bin/bash# perf stat metrics (shadow stat) test# SPDX-License-Identifier: GPL-2.0
set -e
THRESHOLD=0.015
# skip if system-wide mode is forbiddenperf stat -a true > /dev/null 2>&1 || exit 2
# skip if on hybrid platformperf stat -a -e cycles sleep 1 2>&1 | grep -e cpu_core && exit 2
test_global_aggr(){ perf stat -a --no-big-num -M insn_per_cycle sleep 1 2>&1 | \ grep -e cycles -e instructions | \ while read num evt _ ipc rest do # skip not counted events if [ "$num" = "<not" ]; then continue fi
# save cycles count if [ "$evt" = "cycles" ]; then cyc=$num continue fi
# skip if no cycles if [ -z "$cyc" ]; then continue fi
# use printf for rounding and a leading zero res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'` if [ "$ipc" != "$res" ]; then # check the difference from the real result for FP imperfections diff=`echo $ipc $res $THRESHOLD | \ awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
if [ $diff -eq 1 ]; then echo "IPC is different: $res != $ipc ($num / $cyc)" exit 1 fi
echo "Warning: Difference of IPC is under the threshold" fi done}
test_no_aggr(){ perf stat -a -A --no-big-num -M insn_per_cycle sleep 1 2>&1 | \ grep ^CPU | \ while read cpu num evt _ ipc rest do # skip not counted events if [ "$num" = "<not" ]; then continue fi
# save cycles count if [ "$evt" = "cycles" ]; then results="$results $cpu:$num" continue fi
cyc=${results##* $cpu:} cyc=${cyc%% *}
# skip if no cycles if [ -z "$cyc" ]; then continue fi
# use printf for rounding and a leading zero res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'` if [ "$ipc" != "$res" ]; then # check difference from the real result for FP imperfections diff=`echo $ipc $res $THRESHOLD | \ awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
if [ $diff -eq 1 ]; then echo "IPC is different: $res != $ipc ($num / $cyc)" exit 1 fi
echo "Warning: Difference of IPC is under the threshold" fi done}
test_global_aggrtest_no_aggr
exit 0