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From: Tommi Rantala <tommi.t.rantala@nokia.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Ingo Molnar <mingo@redhat.com>
Cc: Tommi Rantala <tommi.t.rantala@nokia.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Ravi Bangoria <ravi.bangoria@linux.ibm.com>,
	Mamatha Inamdar <mamatha4@linux.vnet.ibm.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] perf test session topology: Fix data path
Date: Thu, 23 Apr 2020 14:53:40 +0300	[thread overview]
Message-ID: <20200423115341.562782-1-tommi.t.rantala@nokia.com> (raw)

Commit 2d4f27999b88 ("perf data: Add global path holder") missed path
conversion in tests/topology.c, causing the "Session topology" testcase
to "hang" (waits forever for input from stdin) when doing "ssh $VM perf
test".

Can be reproduced by running "cat | perf test topo", and crashed by
replacing cat with true:

  $ true | perf test -v topo
  40: Session topology                                      :
  --- start ---
  test child forked, pid 3638
  templ file: /tmp/perf-test-QPvAch
  incompatible file format
  incompatible file format (rerun with -v to learn more)
  free(): invalid pointer
  test child interrupted
  ---- end ----
  Session topology: FAILED!

Fixes: 2d4f27999b88 ("perf data: Add global path holder")
Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>
---
 tools/perf/tests/topology.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c
index 4a800499d7c3..22daf2bdf5fa 100644
--- a/tools/perf/tests/topology.c
+++ b/tools/perf/tests/topology.c
@@ -33,10 +33,8 @@ static int session_write_header(char *path)
 {
 	struct perf_session *session;
 	struct perf_data data = {
-		.file      = {
-			.path = path,
-		},
-		.mode      = PERF_DATA_MODE_WRITE,
+		.path = path,
+		.mode = PERF_DATA_MODE_WRITE,
 	};
 
 	session = perf_session__new(&data, false, NULL);
@@ -63,10 +61,8 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
 {
 	struct perf_session *session;
 	struct perf_data data = {
-		.file      = {
-			.path = path,
-		},
-		.mode      = PERF_DATA_MODE_READ,
+		.path = path,
+		.mode = PERF_DATA_MODE_READ,
 	};
 	int i;
 
-- 
2.25.3


             reply	other threads:[~2020-04-23 11:55 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-23 11:53 Tommi Rantala [this message]
2020-04-23 12:17 ` [PATCH] perf test session topology: Fix data path Jiri Olsa
2020-05-08 13:05 ` [tip: perf/core] " tip-bot2 for Tommi Rantala

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