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perf tools: Refactor all_tids to hold nr and the map 

So that later, we can pass the thread_map instance instead of
(thread_num, thread_map) for things like perf_evsel__open and friends,
just like was done with cpu_map.

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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2011-01-03 17:53:33 -02:00
parent 60d567e2d9
commit 5c98d466e4
5 changed files with 88 additions and 85 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
tools/perf/builtin-record.c
View File

@ -54,8 +54,7 @@ static bool sample_id_all_avail = true;
static bool system_wide = false;
static pid_t target_pid = -1;
static pid_t target_tid = -1;
static pid_t *all_tids = NULL;
static int thread_num = 0;
static struct thread_map *threads;
static pid_t child_pid = -1;
static bool no_inherit = false;
static enum write_mode_t write_mode = WRITE_FORCE;
@ -318,9 +317,9 @@ static void create_counter(struct perf_evsel *evsel, int cpu)
retry_sample_id:
attr->sample_id_all = sample_id_all_avail ? 1 : 0;
for (thread_index = 0; thread_index < thread_num; thread_index++) {
for (thread_index = 0; thread_index < threads->nr; thread_index++) {
try_again:
FD(evsel, nr_cpu, thread_index) = sys_perf_event_open(attr, all_tids[thread_index], cpu, group_fd, 0);
FD(evsel, nr_cpu, thread_index) = sys_perf_event_open(attr, threads->map[thread_index], cpu, group_fd, 0);
if (FD(evsel, nr_cpu, thread_index) < 0) {
int err = errno;
@ -653,7 +652,7 @@ static int __cmd_record(int argc, const char **argv)
}
if (!system_wide && target_tid == -1 && target_pid == -1)
all_tids[0] = child_pid;
threads->map[0] = child_pid;
close(child_ready_pipe[1]);
close(go_pipe[0]);
@ -793,7 +792,7 @@ static int __cmd_record(int argc, const char **argv)
list_for_each_entry(pos, &evsel_list, node) {
for (thread = 0;
thread < thread_num;
thread < threads->nr;
thread++)
ioctl(FD(pos, i, thread),
PERF_EVENT_IOC_DISABLE);
@ -910,21 +909,13 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
goto out_symbol_exit;
}
if (target_pid != -1) {
if (target_pid != -1)
target_tid = target_pid;
thread_num = find_all_tid(target_pid, &all_tids);
if (thread_num <= 0) {
fprintf(stderr, "Can't find all threads of pid %d\n",
target_pid);
usage_with_options(record_usage, record_options);
}
} else {
all_tids=malloc(sizeof(pid_t));
if (!all_tids)
goto out_symbol_exit;
all_tids[0] = target_tid;
thread_num = 1;
threads = thread_map__new(target_pid, target_tid);
if (threads == NULL) {
pr_err("Problems finding threads of monitor\n");
usage_with_options(record_usage, record_options);
}
cpus = cpu_map__new(cpu_list);
@ -934,11 +925,11 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
}
list_for_each_entry(pos, &evsel_list, node) {
if (perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
goto out_free_fd;
}
event_array = malloc(
sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
event_array = malloc((sizeof(struct pollfd) * MAX_NR_CPUS *
MAX_COUNTERS * threads->nr));
if (!event_array)
goto out_free_fd;
@ -965,8 +956,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
out_free_event_array:
free(event_array);
out_free_fd:
free(all_tids);
all_tids = NULL;
thread_map__delete(threads);
threads = NULL;
out_symbol_exit:
symbol__exit();
return err;

41
tools/perf/builtin-stat.c
View File

@ -81,8 +81,7 @@ static bool scale = true;
static bool no_aggr = false;
static pid_t target_pid = -1;
static pid_t target_tid = -1;
static pid_t *all_tids = NULL;
static int thread_num = 0;
static struct thread_map *threads;
static pid_t child_pid = -1;
static bool null_run = false;
static bool big_num = true;
@ -175,7 +174,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel)
attr->enable_on_exec = 1;
}
return perf_evsel__open_per_thread(evsel, thread_num, all_tids);
return perf_evsel__open_per_thread(evsel, threads->nr, threads->map);
}
/*
@ -200,7 +199,7 @@ static int read_counter_aggr(struct perf_evsel *counter)
u64 *count = counter->counts->aggr.values;
int i;
if (__perf_evsel__read(counter, cpus->nr, thread_num, scale) < 0)
if (__perf_evsel__read(counter, cpus->nr, threads->nr, scale) < 0)
return -1;
for (i = 0; i < 3; i++)
@ -298,7 +297,7 @@ static int run_perf_stat(int argc __used, const char **argv)
}
if (target_tid == -1 && target_pid == -1 && !system_wide)
all_tids[0] = child_pid;
threads->map[0] = child_pid;
/*
* Wait for the child to be ready to exec.
@ -353,7 +352,7 @@ static int run_perf_stat(int argc __used, const char **argv)
} else {
list_for_each_entry(counter, &evsel_list, node) {
read_counter_aggr(counter);
perf_evsel__close_fd(counter, cpus->nr, thread_num);
perf_evsel__close_fd(counter, cpus->nr, threads->nr);
}
}
@ -693,6 +692,15 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
}
}
if (target_pid != -1)
target_tid = target_pid;
threads = thread_map__new(target_pid, target_tid);
if (threads == NULL) {
pr_err("Problems finding threads of monitor\n");
usage_with_options(stat_usage, options);
}
if (system_wide)
cpus = cpu_map__new(cpu_list);
else
@ -704,27 +712,10 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
return -1;
}
if (target_pid != -1) {
target_tid = target_pid;
thread_num = find_all_tid(target_pid, &all_tids);
if (thread_num <= 0) {
fprintf(stderr, "Can't find all threads of pid %d\n",
target_pid);
usage_with_options(stat_usage, options);
}
} else {
all_tids=malloc(sizeof(pid_t));
if (!all_tids)
return -ENOMEM;
all_tids[0] = target_tid;
thread_num = 1;
}
list_for_each_entry(pos, &evsel_list, node) {
if (perf_evsel__alloc_stat_priv(pos) < 0 ||
perf_evsel__alloc_counts(pos, cpus->nr) < 0 ||
perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
goto out_free_fd;
}
@ -752,5 +743,7 @@ out_free_fd:
list_for_each_entry(pos, &evsel_list, node)
perf_evsel__free_stat_priv(pos);
out:
thread_map__delete(threads);
threads = NULL;
return status;
}

35
tools/perf/builtin-top.c
View File

@ -68,8 +68,7 @@ static int print_entries;
static int target_pid = -1;
static int target_tid = -1;
static pid_t *all_tids = NULL;
static int thread_num = 0;
static struct thread_map *threads;
static bool inherit = false;
static struct cpu_map *cpus;
static int realtime_prio = 0;
@ -1200,7 +1199,7 @@ static void perf_session__mmap_read(struct perf_session *self)
for (i = 0; i < cpus->nr; i++) {
list_for_each_entry(counter, &evsel_list, node) {
for (thread_index = 0;
thread_index < thread_num;
thread_index < threads->nr;
thread_index++) {
perf_session__mmap_read_counter(self,
counter, i, thread_index);
@ -1236,10 +1235,10 @@ static void start_counter(int i, struct perf_evsel *evsel)
attr->inherit = (cpu < 0) && inherit;
attr->mmap = 1;
for (thread_index = 0; thread_index < thread_num; thread_index++) {
for (thread_index = 0; thread_index < threads->nr; thread_index++) {
try_again:
FD(evsel, i, thread_index) = sys_perf_event_open(attr,
all_tids[thread_index], cpu, group_fd, 0);
threads->map[thread_index], cpu, group_fd, 0);
if (FD(evsel, i, thread_index) < 0) {
int err = errno;
@ -1410,25 +1409,17 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
if (argc)
usage_with_options(top_usage, options);
if (target_pid != -1) {
if (target_pid != -1)
target_tid = target_pid;
thread_num = find_all_tid(target_pid, &all_tids);
if (thread_num <= 0) {
fprintf(stderr, "Can't find all threads of pid %d\n",
target_pid);
usage_with_options(top_usage, options);
}
} else {
all_tids=malloc(sizeof(pid_t));
if (!all_tids)
return -ENOMEM;
all_tids[0] = target_tid;
thread_num = 1;
threads = thread_map__new(target_pid, target_tid);
if (threads == NULL) {
pr_err("Problems finding threads of monitor\n");
usage_with_options(top_usage, options);
}
event_array = malloc(
sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
event_array = malloc((sizeof(struct pollfd) *
MAX_NR_CPUS * MAX_COUNTERS * threads->nr));
if (!event_array)
return -ENOMEM;
@ -1468,8 +1459,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
usage_with_options(top_usage, options);
list_for_each_entry(pos, &evsel_list, node) {
if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, thread_num) < 0 ||
perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, threads->nr) < 0 ||
perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
goto out_free_fd;
/*
* Fill in the ones not specifically initialized via -c:

43
tools/perf/util/thread.c
View File

@ -16,35 +16,50 @@ static int filter(const struct dirent *dir)
return 1;
}
int find_all_tid(int pid, pid_t ** all_tid)
struct thread_map *thread_map__new_by_pid(pid_t pid)
{
struct thread_map *threads;
char name[256];
int items;
struct dirent **namelist = NULL;
int ret = 0;
int i;
sprintf(name, "/proc/%d/task", pid);
items = scandir(name, &namelist, filter, NULL);
if (items <= 0)
return -ENOENT;
*all_tid = malloc(sizeof(pid_t) * items);
if (!*all_tid) {
ret = -ENOMEM;
goto failure;
return NULL;
threads = malloc(sizeof(*threads) + sizeof(pid_t) * items);
if (threads != NULL) {
for (i = 0; i < items; i++)
threads->map[i] = atoi(namelist[i]->d_name);
threads->nr = items;
}
for (i = 0; i < items; i++)
(*all_tid)[i] = atoi(namelist[i]->d_name);
ret = items;
failure:
for (i=0; i<items; i++)
free(namelist[i]);
free(namelist);
return ret;
return threads;
}
struct thread_map *thread_map__new_by_tid(pid_t tid)
{
struct thread_map *threads = malloc(sizeof(*threads) + sizeof(pid_t));
if (threads != NULL) {
threads->map[0] = tid;
threads->nr = 1;
}
return threads;
}
struct thread_map *thread_map__new(pid_t pid, pid_t tid)
{
if (pid != -1)
return thread_map__new_by_pid(pid);
return thread_map__new_by_tid(tid);
}
static struct thread *thread__new(pid_t pid)

15
tools/perf/util/thread.h
View File

@ -18,11 +18,24 @@ struct thread {
int comm_len;
};
struct thread_map {
int nr;
int map[];
};
struct perf_session;
void thread__delete(struct thread *self);
int find_all_tid(int pid, pid_t ** all_tid);
struct thread_map *thread_map__new_by_pid(pid_t pid);
struct thread_map *thread_map__new_by_tid(pid_t tid);
struct thread_map *thread_map__new(pid_t pid, pid_t tid);
static inline void thread_map__delete(struct thread_map *threads)
{
free(threads);
}
int thread__set_comm(struct thread *self, const char *comm);
int thread__comm_len(struct thread *self);
struct thread *perf_session__findnew(struct perf_session *self, pid_t pid);