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Date: Mon, 17 Jul 2023 20:00:02 +0800
From: Changbin Du <changbin.du@...wei.com>
To: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>
CC: Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
<linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Hui Wang <hw.huiwang@...wei.com>,
Changbin Du <changbin.du@...wei.com>
Subject: [PATCH v2 1/2] perf cpumap: Add __perf_cpu_map__new and perf_cpu_map__2_cpuset
This adds two new api which will be used later.
- __perf_cpu_map__new: accept a specified separator instead of ','.
- perf_cpu_map__2_cpuset: convert perf_cpu_map to cpu_set_t.
Signed-off-by: Changbin Du <changbin.du@...wei.com>
---
tools/lib/perf/cpumap.c | 45 ++++++++++++++++++++++++++--
tools/lib/perf/include/perf/cpumap.h | 4 +++
tools/lib/perf/libperf.map | 2 ++
tools/perf/tests/cpumap.c | 22 ++++++++++++++
4 files changed, 70 insertions(+), 3 deletions(-)
diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c
index 2a5a29217374..23e907078b28 100644
--- a/tools/lib/perf/cpumap.c
+++ b/tools/lib/perf/cpumap.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
+#define _GNU_SOURCE
#include <perf/cpumap.h>
#include <stdlib.h>
#include <linux/refcount.h>
@@ -7,6 +8,7 @@
#include <stdio.h>
#include <string.h>
#include <unistd.h>
+#include <sched.h>
#include <ctype.h>
#include <limits.h>
@@ -201,7 +203,7 @@ static struct perf_cpu_map *cpu_map__read_all_cpu_map(void)
return cpus;
}
-struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
+struct perf_cpu_map *__perf_cpu_map__new(const char *cpu_list, char sep)
{
struct perf_cpu_map *cpus = NULL;
unsigned long start_cpu, end_cpu = 0;
@@ -225,7 +227,7 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
p = NULL;
start_cpu = strtoul(cpu_list, &p, 0);
if (start_cpu >= INT_MAX
- || (*p != '\0' && *p != ',' && *p != '-'))
+ || (*p != '\0' && *p != sep && *p != '-'))
goto invalid;
if (*p == '-') {
@@ -233,7 +235,7 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
p = NULL;
end_cpu = strtoul(cpu_list, &p, 0);
- if (end_cpu >= INT_MAX || (*p != '\0' && *p != ','))
+ if (end_cpu >= INT_MAX || (*p != '\0' && *p != sep))
goto invalid;
if (end_cpu < start_cpu)
@@ -278,6 +280,11 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
return cpus;
}
+struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
+{
+ return __perf_cpu_map__new(cpu_list, ',');
+}
+
static int __perf_cpu_map__nr(const struct perf_cpu_map *cpus)
{
return RC_CHK_ACCESS(cpus)->nr;
@@ -479,3 +486,35 @@ struct perf_cpu_map *perf_cpu_map__intersect(struct perf_cpu_map *orig,
free(tmp_cpus);
return merged;
}
+
+/* The caller is responsible for freeing returned cpu_set_t with CPU_FREE(). */
+cpu_set_t *perf_cpu_map__2_cpuset(struct perf_cpu_map *cpus, size_t *cpuset_size)
+{
+ cpu_set_t *cpusetp;
+ int max_cpu;
+ struct perf_cpu cpu;
+ int idx;
+
+ if (perf_cpu_map__has_any_cpu(cpus))
+ return NULL;
+
+ max_cpu = perf_cpu_map__max(cpus).cpu;
+ if (max_cpu < 0)
+ return NULL;
+
+ cpusetp = CPU_ALLOC(max_cpu + 1);
+ if (cpusetp == NULL)
+ return NULL;
+
+ *cpuset_size = CPU_ALLOC_SIZE(max_cpu + 1);
+ CPU_ZERO_S(*cpuset_size, cpusetp);
+
+ perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
+ if (cpu.cpu == -1)
+ continue;
+
+ CPU_SET_S(cpu.cpu, *cpuset_size, cpusetp);
+ }
+
+ return cpusetp;
+}
diff --git a/tools/lib/perf/include/perf/cpumap.h b/tools/lib/perf/include/perf/cpumap.h
index e38d859a384d..1a0498f92dbe 100644
--- a/tools/lib/perf/include/perf/cpumap.h
+++ b/tools/lib/perf/include/perf/cpumap.h
@@ -3,6 +3,7 @@
#define __LIBPERF_CPUMAP_H
#include <perf/core.h>
+#include <sched.h>
#include <stdio.h>
#include <stdbool.h>
@@ -23,6 +24,7 @@ struct perf_cpu_map;
*/
LIBPERF_API struct perf_cpu_map *perf_cpu_map__dummy_new(void);
LIBPERF_API struct perf_cpu_map *perf_cpu_map__default_new(void);
+LIBPERF_API struct perf_cpu_map *__perf_cpu_map__new(const char *cpu_list, char sep);
LIBPERF_API struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list);
LIBPERF_API struct perf_cpu_map *perf_cpu_map__read(FILE *file);
LIBPERF_API struct perf_cpu_map *perf_cpu_map__get(struct perf_cpu_map *map);
@@ -46,6 +48,8 @@ LIBPERF_API bool perf_cpu_map__equal(const struct perf_cpu_map *lhs,
*/
LIBPERF_API bool perf_cpu_map__has_any_cpu(const struct perf_cpu_map *map);
+LIBPERF_API cpu_set_t *perf_cpu_map__2_cpuset(struct perf_cpu_map *cpus, size_t *cpuset_size);
+
#define perf_cpu_map__for_each_cpu(cpu, idx, cpus) \
for ((idx) = 0, (cpu) = perf_cpu_map__cpu(cpus, idx); \
(idx) < perf_cpu_map__nr(cpus); \
diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map
index 190b56ae923a..fe0946e34471 100644
--- a/tools/lib/perf/libperf.map
+++ b/tools/lib/perf/libperf.map
@@ -5,6 +5,7 @@ LIBPERF_0.0.1 {
perf_cpu_map__default_new;
perf_cpu_map__get;
perf_cpu_map__put;
+ __perf_cpu_map__new;
perf_cpu_map__new;
perf_cpu_map__read;
perf_cpu_map__nr;
@@ -12,6 +13,7 @@ LIBPERF_0.0.1 {
perf_cpu_map__empty;
perf_cpu_map__max;
perf_cpu_map__has;
+ perf_cpu_map__2_cpuset;
perf_thread_map__new_array;
perf_thread_map__new_dummy;
perf_thread_map__set_pid;
diff --git a/tools/perf/tests/cpumap.c b/tools/perf/tests/cpumap.c
index 7730fc2ab40b..0661bdfbb252 100644
--- a/tools/perf/tests/cpumap.c
+++ b/tools/perf/tests/cpumap.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include "tests.h"
+#include <sched.h>
#include <stdio.h>
#include "cpumap.h"
#include "event.h"
@@ -247,12 +248,33 @@ static int test__cpu_map_equal(struct test_suite *test __maybe_unused, int subte
return TEST_OK;
}
+static int test__cpu_map_convert(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
+{
+ struct perf_cpu_map *any = perf_cpu_map__dummy_new();
+ struct perf_cpu_map *cpus = perf_cpu_map__new("1-2");
+ cpu_set_t *cpu_set;
+ size_t setsize;
+
+ cpu_set = perf_cpu_map__2_cpuset(any, &setsize);
+ TEST_ASSERT_VAL("not equal", cpu_set == NULL);
+ CPU_FREE(cpu_set);
+
+ cpu_set = perf_cpu_map__2_cpuset(cpus, &setsize);
+ TEST_ASSERT_VAL("cpus", cpu_set != NULL);
+ TEST_ASSERT_VAL("bad cpuset", !CPU_ISSET_S(0, setsize, cpu_set));
+ TEST_ASSERT_VAL("bad cpuset", CPU_ISSET_S(1, setsize, cpu_set));
+ TEST_ASSERT_VAL("bad cpuset", CPU_ISSET_S(2, setsize, cpu_set));
+
+ return TEST_OK;
+}
+
static struct test_case tests__cpu_map[] = {
TEST_CASE("Synthesize cpu map", cpu_map_synthesize),
TEST_CASE("Print cpu map", cpu_map_print),
TEST_CASE("Merge cpu map", cpu_map_merge),
TEST_CASE("Intersect cpu map", cpu_map_intersect),
TEST_CASE("Equal cpu map", cpu_map_equal),
+ TEST_CASE("Convert cpu map", cpu_map_convert),
{ .name = NULL, }
};
--
2.25.1
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