lkml.org 
[lkml]   [2022]   [Oct]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/8] perf test: Use a test program in perf record tests
Date
If the system has cc it could build a test program with two threads
and then use it for more detailed testing. Also it accepts an option
to run a thread forever to ensure multi-thread runs.

If cc is not found, it falls back to use the default value 'true'.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/tests/shell/record.sh | 64 ++++++++++++++++++++++++++++++--
1 file changed, 60 insertions(+), 4 deletions(-)

diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
index 464071462809..952981481239 100755
--- a/tools/perf/tests/shell/record.sh
+++ b/tools/perf/tests/shell/record.sh
@@ -6,10 +6,17 @@ set -e

err=0
perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+testprog=$(mktemp /tmp/__perf_test.prog.XXXXXX)
+testsym="test_loop"

cleanup() {
rm -f "${perfdata}"
rm -f "${perfdata}".old
+
+ if [ "${testprog}" != "true" ]; then
+ rm -f "${testprog}"
+ fi
+
trap - EXIT TERM INT
}

@@ -19,9 +26,56 @@ trap_cleanup() {
}
trap trap_cleanup EXIT TERM INT

+build_test_program() {
+ if ! [ -x "$(command -v cc)" ]; then
+ # No CC found. Fall back to 'true'
+ testprog=true
+ testsym=true
+ return
+ fi
+
+ echo "Build a test program"
+ cat <<EOF | cc -o ${testprog} -xc - -pthread
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+void test_loop(void) {
+ volatile int count = 1000000;
+
+ while (count--)
+ continue;
+}
+
+void *thfunc(void *arg) {
+ int forever = *(int *)arg;
+
+ do {
+ test_loop();
+ } while (forever);
+
+ return NULL;
+}
+
+int main(int argc, char *argv[]) {
+ pthread_t th;
+ int forever = 0;
+
+ if (argc > 1)
+ forever = atoi(argv[1]);
+
+ pthread_create(&th, NULL, thfunc, &forever);
+ test_loop();
+ pthread_join(th, NULL);
+
+ return 0;
+}
+EOF
+}
+
test_per_thread() {
echo "Basic --per-thread mode test"
- if ! perf record -o /dev/null --quiet true 2> /dev/null
+ if ! perf record -o /dev/null --quiet ${testprog} 2> /dev/null
then
echo "Per-thread record [Skipped event not supported]"
if [ $err -ne 1 ]
@@ -30,13 +84,13 @@ test_per_thread() {
fi
return
fi
- if ! perf record --per-thread -o "${perfdata}" true 2> /dev/null
+ if ! perf record --per-thread -o "${perfdata}" ${testprog} 2> /dev/null
then
echo "Per-thread record [Failed record]"
err=1
return
fi
- if ! perf report -i "${perfdata}" -q | grep -q true
+ if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"
then
echo "Per-thread record [Failed missing output]"
err=1
@@ -62,7 +116,7 @@ test_register_capture() {
return
fi
if ! perf record -o - --intr-regs=di,r8,dx,cx -e br_inst_retired.near_call:p \
- -c 1000 --per-thread true 2> /dev/null \
+ -c 1000 --per-thread ${testprog} 2> /dev/null \
| perf script -F ip,sym,iregs -i - 2> /dev/null \
| grep -q "DI:"
then
@@ -73,6 +127,8 @@ test_register_capture() {
echo "Register capture test [Success]"
}

+build_test_program
+
test_per_thread
test_register_capture

--
2.38.0.135.g90850a2211-goog
\
 
 \ /
  Last update: 2022-10-20 19:28    [W:0.153 / U:0.452 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site