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perf test: Suppress logs in cs-etm testing

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With the option '-v' for the verbose logs, "perf test" outputs tons of
logs for the CoreSight case, the logs are mainly introduced by the
decoding.  And it outputs some trivial info from "perf record" command
and there have debugging info for CPU number and device name when
iterates between ETMs and sinks.

For a neat output format, this patch redirects the output logs to
"/dev/null", thus can avoid to flood logs.  And it removes the redundant
log for CPU number and device name, which have already printed out the
relevant info in the function record_touch_file().

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Basil Eljuse <basil.eljuse@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Link: http://lore.kernel.org/lkml/20210215115944.535986-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2021-02-15 19:59:43 +08:00 committed by Arnaldo Carvalho de Melo
parent 067012974c
commit 46355e3d79
1 changed files with 9 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
tools/perf/tests/shell/test_arm_coresight.sh
View file

@ -33,7 +33,7 @@ record_touch_file() {
echo "Recording trace (only user mode) with path: CPU$2 => $1"
rm -f $file
perf record -o ${perfdata} -e cs_etm/@$1/u --per-thread \
-- taskset -c $2 touch $file
-- taskset -c $2 touch $file > /dev/null 2>&1
}
perf_script_branch_samples() {
@ -43,8 +43,8 @@ perf_script_branch_samples() {
# touch 6512 1 branches:u: ffffb220824c strcmp+0xc (/lib/aarch64-linux-gnu/ld-2.27.so)
# touch 6512 1 branches:u: ffffb22082e0 strcmp+0xa0 (/lib/aarch64-linux-gnu/ld-2.27.so)
# touch 6512 1 branches:u: ffffb2208320 strcmp+0xe0 (/lib/aarch64-linux-gnu/ld-2.27.so)
perf script -F,-time -i ${perfdata} | \
egrep " +$1 +[0-9]+ .* +branches:(.*:)? +"
perf script -F,-time -i ${perfdata} 2>&1 | \
egrep " +$1 +[0-9]+ .* +branches:(.*:)? +" > /dev/null 2>&1
}
perf_report_branch_samples() {
@ -54,8 +54,8 @@ perf_report_branch_samples() {
# 73.04% 73.04% touch libc-2.27.so [.] _dl_addr
# 7.71% 7.71% touch libc-2.27.so [.] getenv
# 2.59% 2.59% touch ld-2.27.so [.] strcmp
perf report --stdio -i ${perfdata} | \
egrep " +[0-9]+\.[0-9]+% +[0-9]+\.[0-9]+% +$1 "
perf report --stdio -i ${perfdata} 2>&1 | \
egrep " +[0-9]+\.[0-9]+% +[0-9]+\.[0-9]+% +$1 " > /dev/null 2>&1
}
perf_report_instruction_samples() {
@ -65,8 +65,8 @@ perf_report_instruction_samples() {
# 68.12% touch libc-2.27.so [.] _dl_addr
# 5.80% touch libc-2.27.so [.] getenv
# 4.35% touch ld-2.27.so [.] _dl_fixup
perf report --itrace=i1000i --stdio -i ${perfdata} | \
egrep " +[0-9]+\.[0-9]+% +$1"
perf report --itrace=i1000i --stdio -i ${perfdata} 2>&1 | \
egrep " +[0-9]+\.[0-9]+% +$1" > /dev/null 2>&1
}
is_device_sink() {
@ -129,9 +129,6 @@ arm_cs_etm_traverse_path_test() {
# Find the ETM device belonging to which CPU
cpu=`cat $dev/cpu`
echo $dev
echo $cpu
# Use depth-first search (DFS) to iterate outputs
arm_cs_iterate_devices $dev $cpu
done
@ -139,7 +136,7 @@ arm_cs_etm_traverse_path_test() {
arm_cs_etm_system_wide_test() {
echo "Recording trace with system wide mode"
perf record -o ${perfdata} -e cs_etm// -a -- ls
perf record -o ${perfdata} -e cs_etm// -a -- ls > /dev/null 2>&1
perf_script_branch_samples perf &&
perf_report_branch_samples perf &&
@ -154,7 +151,7 @@ arm_cs_etm_system_wide_test() {
arm_cs_etm_snapshot_test() {
echo "Recording trace with snapshot mode"
perf record -o ${perfdata} -e cs_etm// -S \
-- dd if=/dev/zero of=/dev/null &
-- dd if=/dev/zero of=/dev/null > /dev/null 2>&1 &
PERFPID=$!
# Wait for perf program