linux-kernel - [PATCH] perf/tests: Fix test case 95 Check branch stack sampling on s390

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Date:   Wed, 27 Jul 2022 09:11:59 +0200
From:   Thomas Richter <tmricht@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        acme@...nel.org, german.gomez@....com
Cc:     svens@...ux.ibm.com, gor@...ux.ibm.com, sumanthk@...ux.ibm.com,
        hca@...ux.ibm.com, Thomas Richter <tmricht@...ux.ibm.com>
Subject: [PATCH] perf/tests: Fix test case 95 Check branch stack sampling on s390

On linux-next tree perf test 95 was added recently.
s390 does not support branch sampling at all. Therefore
omit this test on s390 platform.

Output before:
 # ./perf test -Fv 95
 95: Check branch stack sampling                                     :
 --- start ---
 Testing user branch stack sampling
 ---- end ----
 Check branch stack sampling: FAILED!
 #

Output after:
 # ./perf test -Fv 95
 95: Check branch stack sampling                                     :
 --- start ---
 ---- end ----
 Check branch stack sampling: Skip
 #

Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>
---
 tools/perf/tests/shell/test_brstack.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/tests/shell/test_brstack.sh b/tools/perf/tests/shell/test_brstack.sh
index 113ccd17bf03..dedaf74164dc 100755
--- a/tools/perf/tests/shell/test_brstack.sh
+++ b/tools/perf/tests/shell/test_brstack.sh
@@ -4,6 +4,9 @@
 # SPDX-License-Identifier: GPL-2.0
 # German Gomez <german.gomez@....com>, 2022
 
+# s390 does not support branch sampling, omit
+[ $(uname -m) = "s390" -o $(uname -m) = "s390x" ] && exit 2
+
 # we need a C compiler to build the test programs
 # so bail if none is found
 if ! [ -x "$(command -v cc)" ]; then
-- 
2.36.1