From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 4/4] perf tools: Use sysfs__mountpoint() when reading cpu topology
Date: Tue, 19 Feb 2019 10:58:15 +0100 [thread overview]
Message-ID: <20190219095815.15931-5-jolsa@kernel.org> (raw)
In-Reply-To: <20190219095815.15931-1-jolsa@kernel.org>
Using sysfs__mountpoint() when reading sysfs files
for cpu/numa topology.
Also using scnprintf instead of sprintf as suggested
by Namhyung.
Link: http://lkml.kernel.org/n/tip-pny10k3m9459q6f2j7ot7uzs@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/cputopo.c | 29 ++++++++++++++++++++++-------
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/tools/perf/util/cputopo.c b/tools/perf/util/cputopo.c
index 83ffca2ea9ee..ece0710249d4 100644
--- a/tools/perf/util/cputopo.c
+++ b/tools/perf/util/cputopo.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <sys/param.h>
#include <inttypes.h>
+#include <api/fs/fs.h>
#include "cputopo.h"
#include "cpumap.h"
@@ -9,9 +10,15 @@
#define CORE_SIB_FMT \
- "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
+ "%s/devices/system/cpu/cpu%d/topology/core_siblings_list"
#define THRD_SIB_FMT \
- "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
+ "%s/devices/system/cpu/cpu%d/topology/thread_siblings_list"
+#define NODE_ONLINE_FMT \
+ "%s/devices/system/node/online"
+#define NODE_MEMINFO_FMT \
+ "%s/devices/system/node/node%d/meminfo"
+#define NODE_CPULIST_FMT \
+ "%s/devices/system/node/node%d/cpulist"
static int build_cpu_topology(struct cpu_topology *tp, int cpu)
{
@@ -23,7 +30,8 @@ static int build_cpu_topology(struct cpu_topology *tp, int cpu)
u32 i = 0;
int ret = -1;
- sprintf(filename, CORE_SIB_FMT, cpu);
+ scnprintf(filename, MAXPATHLEN, CORE_SIB_FMT,
+ sysfs__mountpoint(), cpu);
fp = fopen(filename, "r");
if (!fp)
goto try_threads;
@@ -50,7 +58,8 @@ static int build_cpu_topology(struct cpu_topology *tp, int cpu)
ret = 0;
try_threads:
- sprintf(filename, THRD_SIB_FMT, cpu);
+ scnprintf(filename, MAXPATHLEN, THRD_SIB_FMT,
+ sysfs__mountpoint(), cpu);
fp = fopen(filename, "r");
if (!fp)
goto done;
@@ -157,7 +166,8 @@ static int load_numa_node(struct numa_topology_node *node, int nr)
node->node = (u32) nr;
- sprintf(str, "/sys/devices/system/node/node%d/meminfo", nr);
+ scnprintf(str, MAXPATHLEN, NODE_MEMINFO_FMT,
+ sysfs__mountpoint(), nr);
fp = fopen(str, "r");
if (!fp)
return -1;
@@ -179,7 +189,8 @@ static int load_numa_node(struct numa_topology_node *node, int nr)
fclose(fp);
fp = NULL;
- sprintf(str, "/sys/devices/system/node/node%d/cpulist", nr);
+ scnprintf(str, MAXPATHLEN, NODE_CPULIST_FMT,
+ sysfs__mountpoint(), nr);
fp = fopen(str, "r");
if (!fp)
@@ -207,13 +218,17 @@ struct numa_topology *numa_topology__new(void)
{
struct cpu_map *node_map = NULL;
struct numa_topology *tp = NULL;
+ char path[MAXPATHLEN];
char *buf = NULL;
size_t len = 0;
u32 nr, i;
FILE *fp;
char *c;
- fp = fopen("/sys/devices/system/node/online", "r");
+ scnprintf(path, MAXPATHLEN, NODE_ONLINE_FMT,
+ sysfs__mountpoint());
+
+ fp = fopen(path, "r");
if (!fp)
return NULL;
--
2.17.2
next prev parent reply other threads:[~2019-02-19 9:58 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-19 9:58 [PATCHv3 0/4] perf tools: Assorted fixes Jiri Olsa
2019-02-19 9:58 ` [PATCH 1/4] perf header: Fix wrong node write in NUMA_TOPOLOGY feature Jiri Olsa
2019-02-28 7:37 ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-19 9:58 ` [PATCH 2/4] perf tools: Add cpu_topology object Jiri Olsa
2019-02-28 7:38 ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-19 9:58 ` [PATCH 3/4] perf tools: Add numa_topology object Jiri Olsa
2019-02-28 7:39 ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-19 9:58 ` Jiri Olsa [this message]
2019-02-28 7:39 ` [tip:perf/core] perf tools: Use sysfs__mountpoint() when reading cpu topology tip-bot for Jiri Olsa
2019-02-19 14:28 ` [PATCHv3 0/4] perf tools: Assorted fixes Namhyung Kim
2019-02-19 15:21 ` Arnaldo Carvalho de Melo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190219095815.15931-5-jolsa@kernel.org \
--to=jolsa@kernel.org \
--cc=a.p.zijlstra@chello.nl \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=namhyung@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).