Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
100 lines
2.1 KiB
Bash
Executable File
100 lines
2.1 KiB
Bash
Executable File
#!/bin/bash
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# perf stat metrics (shadow stat) test
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# SPDX-License-Identifier: GPL-2.0
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set -e
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THRESHOLD=0.015
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# skip if system-wide mode is forbidden
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perf stat -a true > /dev/null 2>&1 || exit 2
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# skip if on hybrid platform
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perf stat -a -e cycles sleep 1 2>&1 | grep -e cpu_core && exit 2
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test_global_aggr()
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{
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perf stat -a --no-big-num -M insn_per_cycle sleep 1 2>&1 | \
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grep -e cycles -e instructions | \
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while read num evt _ ipc rest
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do
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# skip not counted events
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if [ "$num" = "<not" ]; then
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continue
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fi
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# save cycles count
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if [ "$evt" = "cycles" ]; then
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cyc=$num
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continue
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fi
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# skip if no cycles
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if [ -z "$cyc" ]; then
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continue
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fi
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# use printf for rounding and a leading zero
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res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'`
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if [ "$ipc" != "$res" ]; then
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# check the difference from the real result for FP imperfections
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diff=`echo $ipc $res $THRESHOLD | \
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awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
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if [ $diff -eq 1 ]; then
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echo "IPC is different: $res != $ipc ($num / $cyc)"
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exit 1
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fi
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echo "Warning: Difference of IPC is under the threshold"
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fi
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done
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}
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test_no_aggr()
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{
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perf stat -a -A --no-big-num -M insn_per_cycle sleep 1 2>&1 | \
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grep ^CPU | \
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while read cpu num evt _ ipc rest
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do
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# skip not counted events
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if [ "$num" = "<not" ]; then
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continue
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fi
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# save cycles count
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if [ "$evt" = "cycles" ]; then
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results="$results $cpu:$num"
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continue
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fi
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cyc=${results##* $cpu:}
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cyc=${cyc%% *}
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# skip if no cycles
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if [ -z "$cyc" ]; then
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continue
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fi
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# use printf for rounding and a leading zero
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res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'`
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if [ "$ipc" != "$res" ]; then
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# check difference from the real result for FP imperfections
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diff=`echo $ipc $res $THRESHOLD | \
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awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
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if [ $diff -eq 1 ]; then
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echo "IPC is different: $res != $ipc ($num / $cyc)"
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exit 1
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fi
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echo "Warning: Difference of IPC is under the threshold"
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fi
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done
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}
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test_global_aggr
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test_no_aggr
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exit 0
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