[PATCH v2] perf test: Add skip to --per-thread test

From: Ian Rogers
Date: Tue May 03 2022 - 00:34:12 EST


As reported in:
https://lore.kernel.org/linux-perf-users/20220428122821.3652015-1-tmricht@xxxxxxxxxxxxx/
the 'instructions:u' event may not be supported. Add a skip using 'perf
record'.

Switch some code away from pipe to make the failures clearer.

Reported-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Tested-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/tests/shell/record.sh | 44 +++++++++++++++++++++++++++++---
1 file changed, 41 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
index cd1cf14259b8..00c7285ce1ac 100755
--- a/tools/perf/tests/shell/record.sh
+++ b/tools/perf/tests/shell/record.sh
@@ -5,11 +5,43 @@
set -e

err=0
+perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+
+cleanup() {
+ rm -f ${perfdata}
+ rm -f ${perfdata}.old
+ trap - exit term int
+}
+
+trap_cleanup() {
+ cleanup
+ exit 1
+}
+trap trap_cleanup exit term int
+
test_per_thread() {
echo "Basic --per-thread mode test"
- perf record -e instructions:u --per-thread -o- true 2> /dev/null \
- | perf report -i- -q \
- | egrep -q true
+ if ! perf record -e instructions:u -o ${perfdata} --quiet true 2> /dev/null
+ then
+ echo "Per-thread record [Skipped instructions:u not supported]"
+ if [ $err -ne 1 ]
+ then
+ err=2
+ fi
+ return
+ fi
+ if ! perf record -e instructions:u --per-thread -o ${perfdata} true 2> /dev/null
+ then
+ echo "Per-thread record of instructions:u [Failed]"
+ err=1
+ return
+ fi
+ if ! perf report -i ${perfdata} -q | egrep -q true
+ then
+ echo "Per-thread record [Failed missing output]"
+ err=1
+ return
+ fi
echo "Basic --per-thread mode test [Success]"
}

@@ -18,6 +50,10 @@ test_register_capture() {
if ! perf list | egrep -q 'br_inst_retired.near_call'
then
echo "Register capture test [Skipped missing instruction]"
+ if [ $err -ne 1 ]
+ then
+ err=2
+ fi
return
fi
if ! perf record --intr-regs=\? 2>&1 | egrep -q 'available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15'
@@ -39,4 +75,6 @@ test_register_capture() {

test_per_thread
test_register_capture
+
+cleanup
exit $err
--
2.36.0.464.gb9c8b46e94-goog