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From: Michael Petlan <mpetlan@redhat.com>
To: linux-perf-users@vger.kernel.org, acme@kernel.org
Cc: acme@redhat.com, jolsa@kernel.org, german.gomez@arm.com
Subject: [PATCH] perf test: Record only user callchains
Date: Tue, 14 Jun 2022 12:52:07 +0200	[thread overview]
Message-ID: <20220614105207.26223-1-mpetlan@redhat.com> (raw)

The testcase 'Check Arm64 callgraphs are complete in fp mode' wants to
see the following output:

    610 leaf
    62f parent
    648 main

However, without excluding user callchains, the output might look like:
	ffffc2ff40ef1b5c arch_local_irq_enable
	ffffc2ff419d032c __schedule
	ffffc2ff419d06c0 schedule
	ffffc2ff40e4da30 do_notify_resume
	ffffc2ff40e421b0 work_pending
	             610 leaf
	             62f parent
	             648 main

Adding '--user-callchains' leaves only the wanted symbols in the chain.

Suggested-by: German Gomez <german.gomez@arm.com>
Tested-by: Michael Petlan <mpetlan@redhat.com>
Signed-off-by: Michael Petlan <mpetlan@redhat.com>
---
 tools/perf/tests/shell/test_arm_callgraph_fp.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/test_arm_callgraph_fp.sh b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
index 6ffbb27afaba..ec108d45d3c6 100755
--- a/tools/perf/tests/shell/test_arm_callgraph_fp.sh
+++ b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
@@ -43,7 +43,7 @@ CFLAGS="-g -O0 -fno-inline -fno-omit-frame-pointer"
 cc $CFLAGS $TEST_PROGRAM_SOURCE -o $TEST_PROGRAM || exit 1
 
 # Add a 1 second delay to skip samples that are not in the leaf() function
-perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 -- $TEST_PROGRAM 2> /dev/null &
+perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
 PID=$!
 
 echo " + Recording (PID=$PID)..."
-- 
2.18.4


             reply	other threads:[~2022-06-14 10:52 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-14 10:52 Michael Petlan [this message]
2022-06-14 12:11 ` [PATCH] perf test: Record only user callchains German Gomez
2022-06-14 12:19   ` Michael Petlan
2022-06-14 19:09   ` Arnaldo Carvalho de Melo
2022-06-14 13:17 ` Leo Yan
2022-06-14 19:09   ` Arnaldo Carvalho de Melo
2022-06-15  8:14     ` Leo Yan
2022-06-15 13:21       ` German Gomez

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