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2f5d370dec
There are 43 instances of posix shell tests and 35 instances of bash. To give us a single consistent language for testing in, replace all #!/bin/sh to #!/bin/bash. Common sources that are included in both different shells will now work as expected. And we no longer have to fix up bashisms that appear to work when someone's system has sh symlinked to bash, but don't work on other systems that have both shells installed. Although we could have chosen sh, it's not backwards compatible so it wouldn't be possible to bulk convert without re-writing the existing bash tests. Choosing bash also gives us some nicer features including 'local' variable definitions and regexes in if statements that are already widely used in the tests. It's not expected that there are any users with only sh available due to the large number of bash tests that exist. Discussed in relation to running shellcheck here: https://lore.kernel.org/linux-perf-users/e3751a74be34bbf3781c4644f518702a7270220b.1749785642.git.collin.funk1@gmail.com/ Signed-off-by: James Clark <james.clark@linaro.org> Reviewed-by: Collin Funk <collin.funk1@gmail.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Link: https://lore.kernel.org/r/20250623-james-perf-bash-tests-v1-1-f572f54d4559@linaro.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
99 lines
2.1 KiB
Bash
Executable file
99 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 -e cycles,instructions 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 / $cyc)"
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exit 1
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fi
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echo "Warning: Difference of IPC is under the threshold"
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fi
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done
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}
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test_no_aggr()
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{
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perf stat -a -A --no-big-num -e cycles,instructions sleep 1 2>&1 | \
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grep ^CPU | \
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while read cpu num evt _ ipc rest
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do
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# skip not counted events
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if [ "$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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