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perf test: Replace brstack test workload 

So that it can get rid of requirement of a compiler.  Also rename the
symbols to match with the perf test workload.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: James Clark <james.clark@arm.com>
Acked-by: German Gomez <german.gomez@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zhengjun Xing <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20221116233854.1596378-11-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2022-11-16 15:38:52 -08:00 committed by Arnaldo Carvalho de Melo
parent a104f0ea99
commit 7bc1dd96cf
1 changed files with 12 additions and 54 deletions
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66
tools/perf/tests/shell/test_brstack.sh
View File

@ -4,13 +4,6 @@
# SPDX-License-Identifier: GPL-2.0
# German Gomez <german.gomez@arm.com>, 2022
# we need a C compiler to build the test programs
# so bail if none is found
if ! [ -x "$(command -v cc)" ]; then
echo "failed: no compiler, install gcc"
exit 2
fi
# skip the test if the hardware doesn't support branch stack sampling
# and if the architecture doesn't support filter types: any,save_type,u
if ! perf record -o- --no-buildid --branch-filter any,save_type,u -- true > /dev/null 2>&1 ; then
@ -19,6 +12,7 @@ if ! perf record -o- --no-buildid --branch-filter any,save_type,u -- true > /dev
fi
TMPDIR=$(mktemp -d /tmp/__perf_test.program.XXXXX)
TESTPROG="perf test -w brstack"
cleanup() {
rm -rf $TMPDIR
@ -26,57 +20,24 @@ cleanup() {
trap cleanup exit term int
gen_test_program() {
# generate test program
cat << EOF > $1
#define BENCH_RUNS 999999
int cnt;
void bar(void) {
} /* return */
void foo(void) {
bar(); /* call */
} /* return */
void bench(void) {
void (*foo_ind)(void) = foo;
if ((cnt++) % 3) /* branch (cond) */
foo(); /* call */
bar(); /* call */
foo_ind(); /* call (ind) */
}
int main(void)
{
int cnt = 0;
while (1) {
if ((cnt++) > BENCH_RUNS)
break;
bench(); /* call */
} /* branch (uncond) */
return 0;
}
EOF
}
test_user_branches() {
echo "Testing user branch stack sampling"
gen_test_program "$TEMPDIR/program.c"
cc -fno-inline -g "$TEMPDIR/program.c" -o $TMPDIR/a.out
perf record -o $TMPDIR/perf.data --branch-filter any,save_type,u -- $TMPDIR/a.out > /dev/null 2>&1
perf record -o $TMPDIR/perf.data --branch-filter any,save_type,u -- ${TESTPROG} > /dev/null 2>&1
perf script -i $TMPDIR/perf.data --fields brstacksym | xargs -n1 > $TMPDIR/perf.script
# example of branch entries:
# foo+0x14/bar+0x40/P/-/-/0/CALL
# brstack_foo+0x14/brstack_bar+0x40/P/-/-/0/CALL
set -x
egrep -m1 "^bench\+[^ ]*/foo\+[^ ]*/IND_CALL$" $TMPDIR/perf.script
egrep -m1 "^foo\+[^ ]*/bar\+[^ ]*/CALL$" $TMPDIR/perf.script
egrep -m1 "^bench\+[^ ]*/foo\+[^ ]*/CALL$" $TMPDIR/perf.script
egrep -m1 "^bench\+[^ ]*/bar\+[^ ]*/CALL$" $TMPDIR/perf.script
egrep -m1 "^bar\+[^ ]*/foo\+[^ ]*/RET$" $TMPDIR/perf.script
egrep -m1 "^foo\+[^ ]*/bench\+[^ ]*/RET$" $TMPDIR/perf.script
egrep -m1 "^bench\+[^ ]*/bench\+[^ ]*/COND$" $TMPDIR/perf.script
egrep -m1 "^main\+[^ ]*/main\+[^ ]*/UNCOND$" $TMPDIR/perf.script
egrep -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL$" $TMPDIR/perf.script
egrep -m1 "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL$" $TMPDIR/perf.script
egrep -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL$" $TMPDIR/perf.script
egrep -m1 "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL$" $TMPDIR/perf.script
egrep -m1 "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET$" $TMPDIR/perf.script
egrep -m1 "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET$" $TMPDIR/perf.script
egrep -m1 "^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND$" $TMPDIR/perf.script
egrep -m1 "^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND$" $TMPDIR/perf.script
set +x
# some branch types are still not being tested:
@ -91,10 +52,7 @@ test_filter() {
echo "Testing branch stack filtering permutation ($filter,$expect)"
gen_test_program "$TEMPDIR/program.c"
cc -fno-inline -g "$TEMPDIR/program.c" -o $TMPDIR/a.out
perf record -o $TMPDIR/perf.data --branch-filter $filter,save_type,u -- $TMPDIR/a.out > /dev/null 2>&1
perf record -o $TMPDIR/perf.data --branch-filter $filter,save_type,u -- ${TESTPROG} > /dev/null 2>&1
perf script -i $TMPDIR/perf.data --fields brstack | xargs -n1 > $TMPDIR/perf.script
# fail if we find any branch type that doesn't match any of the expected ones