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perf test cs-etm: Speed up disassembly test

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We can use exit snapshot to limit the amount of trace to decode here
too. Also each call to objdump is quite expensive on kcore so limit it
to 2 samples instead of 30. We only want to see if there is no data at
all.

Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Amir Ayupov <aaupov@meta.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mike Leach <mike.leach@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paschalis Mpeis <Paschalis.Mpeis@arm.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2026-06-09 15:40:23 +01:00 committed by Arnaldo Carvalho de Melo
parent 0f900110c7
commit 0e16b54416
1 changed files with 4 additions and 4 deletions
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8
tools/perf/tests/shell/test_arm_coresight_disasm.sh
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@ -43,9 +43,9 @@ branch_search='[[:space:]](bl|b(\.(eq|ne|cs|cc|mi|pl|vs|vc|hi|ls|ge|lt|gt|le|al)
## Test kernel ##
if [ "$(id -u)" == 0 ] && [ -e /proc/kcore ]; then
echo "Testing kernel disassembly"
perf record -o ${perfdata} -e cs_etm//k --kcore -- touch $file > /dev/null 2>&1
perf record -o ${perfdata} -e cs_etm//k --kcore -Se -m,64K -- touch $file > /dev/null 2>&1
perf script -i ${perfdata} -s python:${script_path} -- \
-d --stop-sample=30 -k ${perfdata}/kcore_dir/kcore 2> /dev/null > ${file}
-d --stop-sample=2 -k ${perfdata}/kcore_dir/kcore 2> /dev/null > ${file}
grep -q -E ${branch_search} ${file}
echo "Found kernel branches"
else
@ -55,9 +55,9 @@ fi
## Test user ##
echo "Testing userspace disassembly"
perf record -o ${perfdata} -e cs_etm//u -- touch $file > /dev/null 2>&1
perf record -o ${perfdata} -e cs_etm//u -Se -m,64K -- touch $file > /dev/null 2>&1
perf script -i ${perfdata} -s python:${script_path} -- \
-d --stop-sample=30 2> /dev/null > ${file}
-d --stop-sample=2 2> /dev/null > ${file}
grep -q -E ${branch_search} ${file}
echo "Found userspace branches"