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Message-ID: <20231023033144.1011896-1-yangjihong1@huawei.com>
Date: Mon, 23 Oct 2023 03:31:44 +0000
From: Yang Jihong <yangjihong1@...wei.com>
To: <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
<mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
<jolsa@...nel.org>, <namhyung@...nel.org>, <irogers@...gle.com>,
<adrian.hunter@...el.com>, <linux-perf-users@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <yangjihong1@...wei.com>
Subject: [PATCH] perf evsel: Rename evsel__increase_rlimit to rlimit__increase_nofile
evsel__increase_rlimit() helper does nothing with evsel, and description
of the functionality is inaccurate, rename it and move to util/rlimit.c.
By the way, fix a checkppatch warning about misplaced license tag:
WARNING: Misplaced SPDX-License-Identifier tag - use line 1 instead
#160: FILE: tools/perf/util/rlimit.h:3:
/* SPDX-License-Identifier: LGPL-2.1 */
No functional change.
Signed-off-by: Yang Jihong <yangjihong1@...wei.com>
---
tools/perf/util/data.c | 4 ++--
tools/perf/util/evsel.c | 30 ++----------------------------
tools/perf/util/evsel.h | 3 ---
tools/perf/util/rlimit.c | 28 ++++++++++++++++++++++++++++
tools/perf/util/rlimit.h | 11 ++++++++++-
5 files changed, 42 insertions(+), 34 deletions(-)
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index 098f9e3bb2e7..c29d8a382b19 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -17,7 +17,7 @@
#include "util.h" // rm_rf_perf_data()
#include "debug.h"
#include "header.h"
-#include "evsel.h"
+#include "rlimit.h"
#include <internal/lib.h>
static void close_dir(struct perf_data_file *files, int nr)
@@ -64,7 +64,7 @@ int perf_data__create_dir(struct perf_data *data, int nr)
* perf record needs at least 6 fds per CPU.
* When we run out of them try to increase the limits.
*/
- if (errno == EMFILE && evsel__increase_rlimit(&set_rlimit))
+ if (errno == EMFILE && rlimit__increase_nofile(&set_rlimit))
goto retry_open;
ret = -errno;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index d5363d23f5d3..72a5dfc38d38 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -49,6 +49,7 @@
#include "off_cpu.h"
#include "pmu.h"
#include "pmus.h"
+#include "rlimit.h"
#include "../perf-sys.h"
#include "util/parse-branch-options.h"
#include "util/bpf-filter.h"
@@ -1989,33 +1990,6 @@ bool evsel__detect_missing_features(struct evsel *evsel)
}
}
-bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
-{
- int old_errno;
- struct rlimit l;
-
- if (*set_rlimit < INCREASED_MAX) {
- old_errno = errno;
-
- if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
- if (*set_rlimit == NO_CHANGE) {
- l.rlim_cur = l.rlim_max;
- } else {
- l.rlim_cur = l.rlim_max + 1000;
- l.rlim_max = l.rlim_cur;
- }
- if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
- (*set_rlimit) += 1;
- errno = old_errno;
- return true;
- }
- }
- errno = old_errno;
- }
-
- return false;
-}
-
static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
struct perf_thread_map *threads,
int start_cpu_map_idx, int end_cpu_map_idx)
@@ -2143,7 +2117,7 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
* perf stat needs between 5 and 22 fds per CPU. When we run out
* of them try to increase the limits.
*/
- if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
+ if (err == -EMFILE && rlimit__increase_nofile(&set_rlimit))
goto retry_open;
if (err != -EINVAL || idx > 0 || thread > 0)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 815be2491938..d791316a1792 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -330,9 +330,6 @@ int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
struct perf_thread_map *threads);
bool evsel__detect_missing_features(struct evsel *evsel);
-enum rlimit_action { NO_CHANGE, SET_TO_MAX, INCREASED_MAX };
-bool evsel__increase_rlimit(enum rlimit_action *set_rlimit);
-
bool evsel__precise_ip_fallback(struct evsel *evsel);
struct perf_sample;
diff --git a/tools/perf/util/rlimit.c b/tools/perf/util/rlimit.c
index 13521d392a22..f857405fe1aa 100644
--- a/tools/perf/util/rlimit.c
+++ b/tools/perf/util/rlimit.c
@@ -1,5 +1,6 @@
/* SPDX-License-Identifier: LGPL-2.1 */
+#include <errno.h>
#include "util/debug.h"
#include "util/rlimit.h"
#include <sys/time.h>
@@ -27,3 +28,30 @@ void rlimit__bump_memlock(void)
}
}
}
+
+bool rlimit__increase_nofile(enum rlimit_action *set_rlimit)
+{
+ int old_errno;
+ struct rlimit l;
+
+ if (*set_rlimit < INCREASED_MAX) {
+ old_errno = errno;
+
+ if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
+ if (*set_rlimit == NO_CHANGE) {
+ l.rlim_cur = l.rlim_max;
+ } else {
+ l.rlim_cur = l.rlim_max + 1000;
+ l.rlim_max = l.rlim_cur;
+ }
+ if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
+ (*set_rlimit) += 1;
+ errno = old_errno;
+ return true;
+ }
+ }
+ errno = old_errno;
+ }
+
+ return false;
+}
diff --git a/tools/perf/util/rlimit.h b/tools/perf/util/rlimit.h
index 9f59d8e710a3..19050d7fb9d7 100644
--- a/tools/perf/util/rlimit.h
+++ b/tools/perf/util/rlimit.h
@@ -1,6 +1,15 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
#ifndef __PERF_RLIMIT_H_
#define __PERF_RLIMIT_H_
-/* SPDX-License-Identifier: LGPL-2.1 */
+
+enum rlimit_action {
+ NO_CHANGE,
+ SET_TO_MAX,
+ INCREASED_MAX
+};
void rlimit__bump_memlock(void);
+
+bool rlimit__increase_nofile(enum rlimit_action *set_rlimit);
+
#endif // __PERF_RLIMIT_H_
--
2.34.1
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