linux-kernel - [tip:perf/core] perf record: Support aarch64 random socket

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Date:   Thu, 15 Aug 2019 02:35:59 -0700
From:   tip-bot for Tan Xiaojun <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     peterz@...radead.org, alexander.shishkin@...ux.intel.com,
        alexey.budankov@...ux.intel.com, rostedt@...dmis.org,
        tglx@...utronix.de, tanxiaojun@...wei.com, mingo@...nel.org,
        namhyung@...nel.org, jolsa@...nel.org, acme@...hat.com,
        linux-kernel@...r.kernel.org, tz.stoyanov@...il.com,
        kan.liang@...ux.intel.com, songliubraving@...com, hpa@...or.com
Subject: [tip:perf/core] perf record: Support aarch64 random socket_id
 assignment

Commit-ID:  0a4d8fb229dd78f9e0752817339e19e903b37a60
Gitweb:     https://git.kernel.org/tip/0a4d8fb229dd78f9e0752817339e19e903b37a60
Author:     Tan Xiaojun <tanxiaojun@...wei.com>
AuthorDate: Fri, 2 Aug 2019 11:48:57 +0800
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 14 Aug 2019 11:00:00 -0300

perf record: Support aarch64 random socket_id assignment

Same as in the commit 01766229533f ("perf record: Support s390 random
socket_id assignment"), aarch64 also have this problem.

Without this fix:

  [root@...alhost perf]# ./perf report --header -I -v
  ...
  socket_id number is too big.You may need to upgrade the perf tool.

  # ========
  # captured on    : Thu Aug  1 22:58:38 2019
  # header version : 1
  ...
  # Core ID and Socket ID information is not available
  ...

With this fix:
  [root@...alhost perf]# ./perf report --header -I -v
  ...
  cpumask list: 0-31
  cpumask list: 32-63
  cpumask list: 64-95
  cpumask list: 96-127

  # ========
  # captured on    : Thu Aug  1 22:58:38 2019
  # header version : 1
  ...
  # CPU 0: Core ID 0, Socket ID 36
  # CPU 1: Core ID 1, Socket ID 36
  ...
  # CPU 126: Core ID 126, Socket ID 8442
  # CPU 127: Core ID 127, Socket ID 8442
  ...

Signed-off-by: Tan Xiaojun <tanxiaojun@...wei.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc: Kan Liang <kan.liang@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Song Liu <songliubraving@...com>
Cc: Steven Rostedt (VMware) <rostedt@...dmis.org>
Cc: Tzvetomir Stoyanov (VMware) <tz.stoyanov@...il.com>
Link: http://lkml.kernel.org/r/1564717737-21602-1-git-send-email-tanxiaojun@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/header.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index b04c2b6b28b3..1f2965a07bef 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2252,8 +2252,10 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
 	/* On s390 the socket_id number is not related to the numbers of cpus.
 	 * The socket_id number might be higher than the numbers of cpus.
 	 * This depends on the configuration.
+	 * AArch64 is the same.
 	 */
-	if (ph->env.arch && !strncmp(ph->env.arch, "s390", 4))
+	if (ph->env.arch && (!strncmp(ph->env.arch, "s390", 4)
+			  || !strncmp(ph->env.arch, "aarch64", 7)))
 		do_core_id_test = false;
 
 	for (i = 0; i < (u32)cpu_nr; i++) {