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libperf: Add perf_cpu_map__new()/perf_cpu_map__read() functions

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Moving the following functions from tools/perf:

  cpu_map__new()
  cpu_map__read()

to libperf with the following names:

  perf_cpu_map__new()
  perf_cpu_map__read()

Committer notes:

Fixed up this one:

  tools/perf/arch/arm/util/cs-etm.c

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-44-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2019-07-21 13:24:30 +02:00
committed by Arnaldo Carvalho de Melo
parent 1fc632cef4
commit 9c3516d1b8
37 changed files with 265 additions and 227 deletions
Download Patch File Download Diff File Expand all files Collapse all files

181
tools/perf/util/cpumap.c
View File

@@ -17,185 +17,6 @@ static int max_present_cpu_num;
static int max_node_num;
static int *cpunode_map;
static struct perf_cpu_map *cpu_map__default_new(void)
{
struct perf_cpu_map *cpus;
int nr_cpus;
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
if (nr_cpus < 0)
return NULL;
cpus = malloc(sizeof(*cpus) + nr_cpus * sizeof(int));
if (cpus != NULL) {
int i;
for (i = 0; i < nr_cpus; ++i)
cpus->map[i] = i;
cpus->nr = nr_cpus;
refcount_set(&cpus->refcnt, 1);
}
return cpus;
}
static struct perf_cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus)
{
size_t payload_size = nr_cpus * sizeof(int);
struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + payload_size);
if (cpus != NULL) {
cpus->nr = nr_cpus;
memcpy(cpus->map, tmp_cpus, payload_size);
refcount_set(&cpus->refcnt, 1);
}
return cpus;
}
struct perf_cpu_map *cpu_map__read(FILE *file)
{
struct perf_cpu_map *cpus = NULL;
int nr_cpus = 0;
int *tmp_cpus = NULL, *tmp;
int max_entries = 0;
int n, cpu, prev;
char sep;
sep = 0;
prev = -1;
for (;;) {
n = fscanf(file, "%u%c", &cpu, &sep);
if (n <= 0)
break;
if (prev >= 0) {
int new_max = nr_cpus + cpu - prev - 1;
if (new_max >= max_entries) {
max_entries = new_max + MAX_NR_CPUS / 2;
tmp = realloc(tmp_cpus, max_entries * sizeof(int));
if (tmp == NULL)
goto out_free_tmp;
tmp_cpus = tmp;
}
while (++prev < cpu)
tmp_cpus[nr_cpus++] = prev;
}
if (nr_cpus == max_entries) {
max_entries += MAX_NR_CPUS;
tmp = realloc(tmp_cpus, max_entries * sizeof(int));
if (tmp == NULL)
goto out_free_tmp;
tmp_cpus = tmp;
}
tmp_cpus[nr_cpus++] = cpu;
if (n == 2 && sep == '-')
prev = cpu;
else
prev = -1;
if (n == 1 || sep == '\n')
break;
}
if (nr_cpus > 0)
cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
else
cpus = cpu_map__default_new();
out_free_tmp:
free(tmp_cpus);
return cpus;
}
static struct perf_cpu_map *cpu_map__read_all_cpu_map(void)
{
struct perf_cpu_map *cpus = NULL;
FILE *onlnf;
onlnf = fopen("/sys/devices/system/cpu/online", "r");
if (!onlnf)
return cpu_map__default_new();
cpus = cpu_map__read(onlnf);
fclose(onlnf);
return cpus;
}
struct perf_cpu_map *cpu_map__new(const char *cpu_list)
{
struct perf_cpu_map *cpus = NULL;
unsigned long start_cpu, end_cpu = 0;
char *p = NULL;
int i, nr_cpus = 0;
int *tmp_cpus = NULL, *tmp;
int max_entries = 0;
if (!cpu_list)
return cpu_map__read_all_cpu_map();
/*
* must handle the case of empty cpumap to cover
* TOPOLOGY header for NUMA nodes with no CPU
* ( e.g., because of CPU hotplug)
*/
if (!isdigit(*cpu_list) && *cpu_list != '\0')
goto out;
while (isdigit(*cpu_list)) {
p = NULL;
start_cpu = strtoul(cpu_list, &p, 0);
if (start_cpu >= INT_MAX
|| (*p != '\0' && *p != ',' && *p != '-'))
goto invalid;
if (*p == '-') {
cpu_list = ++p;
p = NULL;
end_cpu = strtoul(cpu_list, &p, 0);
if (end_cpu >= INT_MAX || (*p != '\0' && *p != ','))
goto invalid;
if (end_cpu < start_cpu)
goto invalid;
} else {
end_cpu = start_cpu;
}
for (; start_cpu <= end_cpu; start_cpu++) {
/* check for duplicates */
for (i = 0; i < nr_cpus; i++)
if (tmp_cpus[i] == (int)start_cpu)
goto invalid;
if (nr_cpus == max_entries) {
max_entries += MAX_NR_CPUS;
tmp = realloc(tmp_cpus, max_entries * sizeof(int));
if (tmp == NULL)
goto invalid;
tmp_cpus = tmp;
}
tmp_cpus[nr_cpus++] = (int)start_cpu;
}
if (*p)
++p;
cpu_list = p;
}
if (nr_cpus > 0)
cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
else if (*cpu_list != '\0')
cpus = cpu_map__default_new();
else
cpus = perf_cpu_map__dummy_new();
invalid:
free(tmp_cpus);
out:
return cpus;
}
static struct perf_cpu_map *cpu_map__from_entries(struct cpu_map_entries *cpus)
{
struct perf_cpu_map *map;
@@ -751,7 +572,7 @@ const struct perf_cpu_map *cpu_map__online(void) /* thread unsafe */
static const struct perf_cpu_map *online = NULL;
if (!online)
online = cpu_map__new(NULL); /* from /sys/devices/system/cpu/online */
online = perf_cpu_map__new(NULL); /* from /sys/devices/system/cpu/online */
return online;
}

2
tools/perf/util/cpumap.h
View File

@@ -11,10 +11,8 @@
#include "perf.h"
#include "util/debug.h"
struct perf_cpu_map *cpu_map__new(const char *cpu_list);
struct perf_cpu_map *cpu_map__empty_new(int nr);
struct perf_cpu_map *cpu_map__new_data(struct cpu_map_data *data);
struct perf_cpu_map *cpu_map__read(FILE *file);
size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size);
size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size);
size_t cpu_map__fprintf(struct perf_cpu_map *map, FILE *fp);

5
tools/perf/util/cputopo.c
View File

@@ -5,6 +5,7 @@
#include <stdlib.h>
#include <api/fs/fs.h>
#include <linux/zalloc.h>
#include <perf/cpumap.h>
#include "cputopo.h"
#include "cpumap.h"
@@ -182,7 +183,7 @@ struct cpu_topology *cpu_topology__new(void)
ncpus = cpu__max_present_cpu();
/* build online CPU map */
map = cpu_map__new(NULL);
map = perf_cpu_map__new(NULL);
if (map == NULL) {
pr_debug("failed to get system cpumap\n");
return NULL;
@@ -312,7 +313,7 @@ struct numa_topology *numa_topology__new(void)
if (c)
*c = '\0';
node_map = cpu_map__new(buf);
node_map = perf_cpu_map__new(buf);
if (!node_map)
goto out;

5
tools/perf/util/evlist.c
View File

@@ -34,6 +34,7 @@
#include <linux/err.h>
#include <linux/zalloc.h>
#include <perf/evlist.h>
#include <perf/cpumap.h>
#ifdef LACKS_SIGQUEUE_PROTOTYPE
int sigqueue(pid_t pid, int sig, const union sigval value);
@@ -1089,7 +1090,7 @@ int perf_evlist__create_maps(struct evlist *evlist, struct target *target)
if (target__uses_dummy_map(target))
cpus = perf_cpu_map__dummy_new();
else
cpus = cpu_map__new(target->cpu_list);
cpus = perf_cpu_map__new(target->cpu_list);
if (!cpus)
goto out_delete_threads;
@@ -1372,7 +1373,7 @@ static int perf_evlist__create_syswide_maps(struct evlist *evlist)
* error, and we may not want to do that fallback to a
* default cpu identity map :-\
*/
cpus = cpu_map__new(NULL);
cpus = perf_cpu_map__new(NULL);
if (!cpus)
goto out;

3
tools/perf/util/header.c
View File

@@ -20,6 +20,7 @@
#include <linux/time64.h>
#include <dirent.h>
#include <bpf/libbpf.h>
#include <perf/cpumap.h>
#include "evlist.h"
#include "evsel.h"
@@ -2348,7 +2349,7 @@ static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
if (!str)
goto error;
n->map = cpu_map__new(str);
n->map = perf_cpu_map__new(str);
if (!n->map)
goto error;

3
tools/perf/util/parse-events.c
View File

@@ -24,6 +24,7 @@
#include "bpf-loader.h"
#include "debug.h"
#include <api/fs/tracing_path.h>
#include <perf/cpumap.h>
#include "parse-events-bison.h"
#define YY_EXTRA_TYPE int
#include "parse-events-flex.h"
@@ -323,7 +324,7 @@ __add_event(struct list_head *list, int *idx,
{
struct evsel *evsel;
struct perf_cpu_map *cpus = pmu ? pmu->cpus :
cpu_list ? cpu_map__new(cpu_list) : NULL;
cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
event_attr_init(attr);

3
tools/perf/util/pmu.c
View File

@@ -15,6 +15,7 @@
#include <api/fs/fs.h>
#include <locale.h>
#include <regex.h>
#include <perf/cpumap.h>
#include "pmu.h"
#include "parse-events.h"
#include "cpumap.h"
@@ -581,7 +582,7 @@ static struct perf_cpu_map *__pmu_cpumask(const char *path)
if (!file)
return NULL;
cpus = cpu_map__read(file);
cpus = perf_cpu_map__read(file);
fclose(file);
return cpus;
}

3
tools/perf/util/python.c
View File

@@ -4,6 +4,7 @@
#include <inttypes.h>
#include <poll.h>
#include <linux/err.h>
#include <perf/cpumap.h>
#include "evlist.h"
#include "callchain.h"
#include "evsel.h"
@@ -549,7 +550,7 @@ static int pyrf_cpu_map__init(struct pyrf_cpu_map *pcpus,
kwlist, &cpustr))
return -1;
pcpus->cpus = cpu_map__new(cpustr);
pcpus->cpus = perf_cpu_map__new(cpustr);
if (pcpus->cpus == NULL)
return -1;
return 0;

7
tools/perf/util/record.c
View File

@@ -6,6 +6,7 @@
#include <errno.h>
#include <api/fs/fs.h>
#include <subcmd/parse-options.h>
#include <perf/cpumap.h>
#include "util.h"
#include "cloexec.h"
@@ -63,7 +64,7 @@ static bool perf_probe_api(setup_probe_fn_t fn)
struct perf_cpu_map *cpus;
int cpu, ret, i = 0;
cpus = cpu_map__new(NULL);
cpus = perf_cpu_map__new(NULL);
if (!cpus)
return false;
cpu = cpus->map[0];
@@ -118,7 +119,7 @@ bool perf_can_record_cpu_wide(void)
struct perf_cpu_map *cpus;
int cpu, fd;
cpus = cpu_map__new(NULL);
cpus = perf_cpu_map__new(NULL);
if (!cpus)
return false;
cpu = cpus->map[0];
@@ -275,7 +276,7 @@ bool perf_evlist__can_select_event(struct evlist *evlist, const char *str)
evsel = perf_evlist__last(temp_evlist);
if (!evlist || cpu_map__empty(evlist->cpus)) {
struct perf_cpu_map *cpus = cpu_map__new(NULL);
struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
cpu = cpus ? cpus->map[0] : 0;
perf_cpu_map__put(cpus);

3
tools/perf/util/session.c
View File

@@ -10,6 +10,7 @@
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <perf/cpumap.h>
#include "evlist.h"
#include "evsel.h"
@@ -2289,7 +2290,7 @@ int perf_session__cpu_bitmap(struct perf_session *session,
}
}
map = cpu_map__new(cpu_list);
map = perf_cpu_map__new(cpu_list);
if (map == NULL) {
pr_err("Invalid cpu_list\n");
return -1;

3
tools/perf/util/svghelper.c
View File

@@ -16,6 +16,7 @@
#include <linux/bitmap.h>
#include <linux/time64.h>
#include <linux/zalloc.h>
#include <perf/cpumap.h>
#include "perf.h"
#include "svghelper.h"
@@ -731,7 +732,7 @@ static int str_to_bitmap(char *s, cpumask_t *b)
struct perf_cpu_map *m;
int c;
m = cpu_map__new(s);
m = perf_cpu_map__new(s);
if (!m)
return -1;