linux-kernel - [tip: perf/core] perf test session topology: Fix data path

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Message-ID: <158894311318.8414.2157393565908107171.tip-bot2@tip-bot2>
Date:   Fri, 08 May 2020 13:05:13 -0000
From:   "tip-bot2 for Tommi Rantala" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Tommi Rantala <tommi.t.rantala@...ia.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Mamatha Inamdar <mamatha4@...ux.vnet.ibm.com>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: perf/core] perf test session topology: Fix data path

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     dbd660e6b2884b864d2642d930a163d3bcebe4be
Gitweb:        https://git.kernel.org/tip/dbd660e6b2884b864d2642d930a163d3bcebe4be
Author:        Tommi Rantala <tommi.t.rantala@...ia.com>
AuthorDate:    Thu, 23 Apr 2020 14:53:40 +03:00
Committer:     Arnaldo Carvalho de Melo <acme@...hat.com>
CommitterDate: Thu, 23 Apr 2020 11:08:24 -03:00

perf test session topology: Fix data path

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!

Committer testing:

Reproduced the above result before the patch and after it is back
working:

  # true | perf test -v topo
  41: Session topology                                      :
  --- start ---
  test child forked, pid 19374
  templ file: /tmp/perf-test-YOTEQg
  CPU 0, core 0, socket 0
  CPU 1, core 1, socket 0
  CPU 2, core 2, socket 0
  CPU 3, core 3, socket 0
  CPU 4, core 0, socket 0
  CPU 5, core 1, socket 0
  CPU 6, core 2, socket 0
  CPU 7, core 3, socket 0
  test child finished with 0
  ---- end ----
  Session topology: Ok
  #

Fixes: 2d4f27999b88 ("perf data: Add global path holder")
Signed-off-by: Tommi Rantala <tommi.t.rantala@...ia.com>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Acked-by: Jiri Olsa <jolsa@...hat.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Mamatha Inamdar <mamatha4@...ux.vnet.ibm.com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Link: http://lore.kernel.org/lkml/20200423115341.562782-1-tommi.t.rantala@nokia.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.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 4a80049..22daf2b 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;