perf tools: Refactor cpumap to hold nr and the map

So that later, we can pass the cpu_map instance instead of (nr_cpus, cpu_map)
for things like perf_evsel__open and friends.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 48290609
......@@ -39,7 +39,7 @@ static u64 user_interval = ULLONG_MAX;
static u64 default_interval = 0;
static u64 sample_type;
static int nr_cpus = 0;
static struct cpu_map *cpus;
static unsigned int page_size;
static unsigned int mmap_pages = 128;
static unsigned int user_freq = UINT_MAX;
......@@ -670,8 +670,8 @@ static int __cmd_record(int argc, const char **argv)
if (!system_wide && no_inherit && !cpu_list) {
open_counters(-1);
} else {
for (i = 0; i < nr_cpus; i++)
open_counters(cpumap[i]);
for (i = 0; i < cpus->nr; i++)
open_counters(cpus->map[i]);
}
perf_session__set_sample_type(session, sample_type);
......@@ -927,14 +927,14 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
thread_num = 1;
}
nr_cpus = read_cpu_map(cpu_list);
if (nr_cpus < 1) {
perror("failed to collect number of CPUs");
cpus = cpu_map__new(cpu_list);
if (cpus == NULL) {
perror("failed to parse CPUs map");
return -1;
}
list_for_each_entry(pos, &evsel_list, node) {
if (perf_evsel__alloc_fd(pos, nr_cpus, thread_num) < 0)
if (perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
goto out_free_fd;
}
event_array = malloc(
......
......@@ -72,7 +72,7 @@ static struct perf_event_attr default_attrs[] = {
};
static bool system_wide = false;
static int nr_cpus = 0;
static struct cpu_map *cpus;
static int run_idx = 0;
static int run_count = 1;
......@@ -167,7 +167,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel)
PERF_FORMAT_TOTAL_TIME_RUNNING;
if (system_wide)
return perf_evsel__open_per_cpu(evsel, nr_cpus, cpumap);
return perf_evsel__open_per_cpu(evsel, cpus->nr, cpus->map);
attr->inherit = !no_inherit;
if (target_pid == -1 && target_tid == -1) {
......@@ -200,7 +200,7 @@ static int read_counter_aggr(struct perf_evsel *counter)
u64 *count = counter->counts->aggr.values;
int i;
if (__perf_evsel__read(counter, nr_cpus, thread_num, scale) < 0)
if (__perf_evsel__read(counter, cpus->nr, thread_num, scale) < 0)
return -1;
for (i = 0; i < 3; i++)
......@@ -233,7 +233,7 @@ static int read_counter(struct perf_evsel *counter)
u64 *count;
int cpu;
for (cpu = 0; cpu < nr_cpus; cpu++) {
for (cpu = 0; cpu < cpus->nr; cpu++) {
if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
return -1;
......@@ -259,9 +259,6 @@ static int run_perf_stat(int argc __used, const char **argv)
const bool forks = (argc > 0);
char buf;
if (!system_wide)
nr_cpus = 1;
if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
perror("failed to create pipes");
exit(1);
......@@ -351,12 +348,12 @@ static int run_perf_stat(int argc __used, const char **argv)
if (no_aggr) {
list_for_each_entry(counter, &evsel_list, node) {
read_counter(counter);
perf_evsel__close_fd(counter, nr_cpus, 1);
perf_evsel__close_fd(counter, cpus->nr, 1);
}
} else {
list_for_each_entry(counter, &evsel_list, node) {
read_counter_aggr(counter);
perf_evsel__close_fd(counter, nr_cpus, thread_num);
perf_evsel__close_fd(counter, cpus->nr, thread_num);
}
}
......@@ -384,7 +381,7 @@ static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
if (no_aggr)
sprintf(cpustr, "CPU%*d%s",
csv_output ? 0 : -4,
cpumap[cpu], csv_sep);
cpus->map[cpu], csv_sep);
fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
......@@ -412,7 +409,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
if (no_aggr)
sprintf(cpustr, "CPU%*d%s",
csv_output ? 0 : -4,
cpumap[cpu], csv_sep);
cpus->map[cpu], csv_sep);
else
cpu = 0;
......@@ -498,14 +495,14 @@ static void print_counter(struct perf_evsel *counter)
u64 ena, run, val;
int cpu;
for (cpu = 0; cpu < nr_cpus; cpu++) {
for (cpu = 0; cpu < cpus->nr; cpu++) {
val = counter->counts->cpu[cpu].val;
ena = counter->counts->cpu[cpu].ena;
run = counter->counts->cpu[cpu].run;
if (run == 0 || ena == 0) {
fprintf(stderr, "CPU%*d%s%*s%s%-24s",
csv_output ? 0 : -4,
cpumap[cpu], csv_sep,
cpus->map[cpu], csv_sep,
csv_output ? 0 : 18,
"<not counted>", csv_sep,
event_name(counter));
......@@ -697,12 +694,15 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
}
if (system_wide)
nr_cpus = read_cpu_map(cpu_list);
cpus = cpu_map__new(cpu_list);
else
nr_cpus = 1;
cpus = cpu_map__dummy_new();
if (nr_cpus < 1)
if (cpus == NULL) {
perror("failed to parse CPUs map");
usage_with_options(stat_usage, options);
return -1;
}
if (target_pid != -1) {
target_tid = target_pid;
......@@ -723,8 +723,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
list_for_each_entry(pos, &evsel_list, node) {
if (perf_evsel__alloc_stat_priv(pos) < 0 ||
perf_evsel__alloc_counts(pos, nr_cpus) < 0 ||
perf_evsel__alloc_fd(pos, nr_cpus, thread_num) < 0)
perf_evsel__alloc_counts(pos, cpus->nr) < 0 ||
perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
goto out_free_fd;
}
......
......@@ -71,7 +71,7 @@ static int target_tid = -1;
static pid_t *all_tids = NULL;
static int thread_num = 0;
static bool inherit = false;
static int nr_cpus = 0;
static struct cpu_map *cpus;
static int realtime_prio = 0;
static bool group = false;
static unsigned int page_size;
......@@ -564,12 +564,12 @@ static void print_sym_table(void)
printf(" (all");
if (cpu_list)
printf(", CPU%s: %s)\n", nr_cpus > 1 ? "s" : "", cpu_list);
printf(", CPU%s: %s)\n", cpus->nr > 1 ? "s" : "", cpu_list);
else {
if (target_tid != -1)
printf(")\n");
else
printf(", %d CPU%s)\n", nr_cpus, nr_cpus > 1 ? "s" : "");
printf(", %d CPU%s)\n", cpus->nr, cpus->nr > 1 ? "s" : "");
}
printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
......@@ -1197,7 +1197,7 @@ static void perf_session__mmap_read(struct perf_session *self)
struct perf_evsel *counter;
int i, thread_index;
for (i = 0; i < nr_cpus; i++) {
for (i = 0; i < cpus->nr; i++) {
list_for_each_entry(counter, &evsel_list, node) {
for (thread_index = 0;
thread_index < thread_num;
......@@ -1221,7 +1221,7 @@ static void start_counter(int i, struct perf_evsel *evsel)
int thread_index;
if (target_tid == -1)
cpu = cpumap[i];
cpu = cpus->map[i];
attr = &evsel->attr;
......@@ -1310,7 +1310,7 @@ static int __cmd_top(void)
else
event__synthesize_threads(event__process, session);
for (i = 0; i < nr_cpus; i++) {
for (i = 0; i < cpus->nr; i++) {
group_fd = -1;
list_for_each_entry(counter, &evsel_list, node)
start_counter(i, counter);
......@@ -1460,16 +1460,16 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
}
if (target_tid != -1)
nr_cpus = 1;
cpus = cpu_map__dummy_new();
else
nr_cpus = read_cpu_map(cpu_list);
cpus = cpu_map__new(cpu_list);
if (nr_cpus < 1)
if (cpus == NULL)
usage_with_options(top_usage, options);
list_for_each_entry(pos, &evsel_list, node) {
if (perf_evsel__alloc_mmap_per_thread(pos, nr_cpus, thread_num) < 0 ||
perf_evsel__alloc_fd(pos, nr_cpus, thread_num) < 0)
if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, thread_num) < 0 ||
perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
goto out_free_fd;
/*
* Fill in the ones not specifically initialized via -c:
......
......@@ -4,32 +4,53 @@
#include <assert.h>
#include <stdio.h>
int cpumap[MAX_NR_CPUS];
static int default_cpu_map(void)
static struct cpu_map *cpu_map__default_new(void)
{
int nr_cpus, i;
struct cpu_map *cpus;
int nr_cpus;
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
assert(nr_cpus <= MAX_NR_CPUS);
assert((int)nr_cpus >= 0);
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;
for (i = 0; i < nr_cpus; ++i)
cpumap[i] = i;
cpus->nr = nr_cpus;
}
return nr_cpus;
return cpus;
}
static int read_all_cpu_map(void)
static struct cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus)
{
size_t payload_size = nr_cpus * sizeof(int);
struct cpu_map *cpus = malloc(sizeof(*cpus) + payload_size);
if (cpus != NULL) {
cpus->nr = nr_cpus;
memcpy(cpus->map, tmp_cpus, payload_size);
}
return cpus;
}
static struct cpu_map *cpu_map__read_all_cpu_map(void)
{
struct cpu_map *cpus = NULL;
FILE *onlnf;
int nr_cpus = 0;
int *tmp_cpus = NULL, *tmp;
int max_entries = 0;
int n, cpu, prev;
char sep;
onlnf = fopen("/sys/devices/system/cpu/online", "r");
if (!onlnf)
return default_cpu_map();
return cpu_map__default_new();
sep = 0;
prev = -1;
......@@ -38,12 +59,28 @@ static int read_all_cpu_map(void)
if (n <= 0)
break;
if (prev >= 0) {
assert(nr_cpus + cpu - prev - 1 < MAX_NR_CPUS);
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)
cpumap[nr_cpus++] = prev;
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;
}
assert (nr_cpus < MAX_NR_CPUS);
cpumap[nr_cpus++] = cpu;
tmp_cpus[nr_cpus++] = cpu;
if (n == 2 && sep == '-')
prev = cpu;
else
......@@ -51,24 +88,31 @@ static int read_all_cpu_map(void)
if (n == 1 || sep == '\n')
break;
}
fclose(onlnf);
if (nr_cpus > 0)
return nr_cpus;
return default_cpu_map();
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);
fclose(onlnf);
return cpus;
}
int read_cpu_map(const char *cpu_list)
struct cpu_map *cpu_map__new(const char *cpu_list)
{
struct 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 read_all_cpu_map();
return cpu_map__read_all_cpu_map();
if (!isdigit(*cpu_list))
goto invalid;
goto out;
while (isdigit(*cpu_list)) {
p = NULL;
......@@ -94,21 +138,42 @@ int read_cpu_map(const char *cpu_list)
for (; start_cpu <= end_cpu; start_cpu++) {
/* check for duplicates */
for (i = 0; i < nr_cpus; i++)
if (cpumap[i] == (int)start_cpu)
if (tmp_cpus[i] == (int)start_cpu)
goto invalid;
assert(nr_cpus < MAX_NR_CPUS);
cpumap[nr_cpus++] = (int)start_cpu;
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)
return nr_cpus;
return default_cpu_map();
if (nr_cpus > 0)
cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
else
cpus = cpu_map__default_new();
invalid:
return -1;
free(tmp_cpus);
out:
return cpus;
}
struct cpu_map *cpu_map__dummy_new(void)
{
struct cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int));
if (cpus != NULL) {
cpus->nr = 1;
cpus->map[0] = -1;
}
return cpus;
}
#ifndef __PERF_CPUMAP_H
#define __PERF_CPUMAP_H
extern int read_cpu_map(const char *cpu_list);
extern int cpumap[];
struct cpu_map {
int nr;
int map[];
};
struct cpu_map *cpu_map__new(const char *cpu_list);
struct cpu_map *cpu_map__dummy_new(void);
void *cpu_map__delete(struct cpu_map *map);
#endif /* __PERF_CPUMAP_H */
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