summaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-record.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/builtin-record.c')
-rw-r--r--tools/perf/builtin-record.c80
1 files changed, 25 insertions, 55 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 92ca541..ab8d15e 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -24,6 +24,7 @@
#include "util/symbol.h"
#include "util/cpumap.h"
#include "util/thread_map.h"
+#include "util/data.h"
#include <unistd.h>
#include <sched.h>
@@ -65,11 +66,10 @@ struct perf_record {
struct perf_tool tool;
struct perf_record_opts opts;
u64 bytes_written;
- const char *output_name;
+ struct perf_data_file file;
struct perf_evlist *evlist;
struct perf_session *session;
const char *progname;
- int output;
int realtime_prio;
bool no_buildid;
bool no_buildid_cache;
@@ -84,11 +84,13 @@ static void advance_output(struct perf_record *rec, size_t size)
static int write_output(struct perf_record *rec, void *buf, size_t size)
{
+ struct perf_data_file *file = &rec->file;
+
while (size) {
- int ret = write(rec->output, buf, size);
+ int ret = write(file->fd, buf, size);
if (ret < 0) {
- pr_err("failed to write\n");
+ pr_err("failed to write perf data, error: %m\n");
return -1;
}
@@ -248,13 +250,14 @@ out:
static int process_buildids(struct perf_record *rec)
{
- u64 size = lseek(rec->output, 0, SEEK_CUR);
+ struct perf_data_file *file = &rec->file;
+ struct perf_session *session = rec->session;
+ u64 size = lseek(file->fd, 0, SEEK_CUR);
if (size == 0)
return 0;
- rec->session->fd = rec->output;
- return __perf_session__process_events(rec->session, rec->post_processing_offset,
+ return __perf_session__process_events(session, rec->post_processing_offset,
size - rec->post_processing_offset,
size, &build_id__mark_dso_hit_ops);
}
@@ -262,17 +265,18 @@ static int process_buildids(struct perf_record *rec)
static void perf_record__exit(int status, void *arg)
{
struct perf_record *rec = arg;
+ struct perf_data_file *file = &rec->file;
if (status != 0)
return;
- if (!rec->opts.pipe_output) {
+ if (!file->is_pipe) {
rec->session->header.data_size += rec->bytes_written;
if (!rec->no_buildid)
process_buildids(rec);
perf_session__write_header(rec->session, rec->evlist,
- rec->output, true);
+ file->fd, true);
perf_session__delete(rec->session);
perf_evlist__delete(rec->evlist);
symbol__exit();
@@ -340,16 +344,14 @@ out:
static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
{
- struct stat st;
- int flags;
- int err, output, feat;
+ int err, feat;
unsigned long waking = 0;
const bool forks = argc > 0;
struct machine *machine;
struct perf_tool *tool = &rec->tool;
struct perf_record_opts *opts = &rec->opts;
struct perf_evlist *evsel_list = rec->evlist;
- const char *output_name = rec->output_name;
+ struct perf_data_file *file = &rec->file;
struct perf_session *session;
bool disabled = false;
@@ -361,39 +363,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
signal(SIGUSR1, sig_handler);
signal(SIGTERM, sig_handler);
- if (!output_name) {
- if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
- opts->pipe_output = true;
- else
- rec->output_name = output_name = "perf.data";
- }
- if (output_name) {
- if (!strcmp(output_name, "-"))
- opts->pipe_output = true;
- else if (!stat(output_name, &st) && st.st_size) {
- char oldname[PATH_MAX];
- snprintf(oldname, sizeof(oldname), "%s.old",
- output_name);
- unlink(oldname);
- rename(output_name, oldname);
- }
- }
-
- flags = O_CREAT|O_RDWR|O_TRUNC;
-
- if (opts->pipe_output)
- output = STDOUT_FILENO;
- else
- output = open(output_name, flags, S_IRUSR | S_IWUSR);
- if (output < 0) {
- perror("failed to create output file");
- return -1;
- }
-
- rec->output = output;
-
- session = perf_session__new(output_name, O_WRONLY,
- true, false, NULL);
+ session = perf_session__new(file, false, NULL);
if (session == NULL) {
pr_err("Not enough memory for reading perf file header\n");
return -1;
@@ -415,7 +385,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
if (forks) {
err = perf_evlist__prepare_workload(evsel_list, &opts->target,
- argv, opts->pipe_output,
+ argv, file->is_pipe,
true);
if (err < 0) {
pr_err("Couldn't run the workload!\n");
@@ -436,13 +406,13 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
*/
on_exit(perf_record__exit, rec);
- if (opts->pipe_output) {
- err = perf_header__write_pipe(output);
+ if (file->is_pipe) {
+ err = perf_header__write_pipe(file->fd);
if (err < 0)
goto out_delete_session;
} else {
err = perf_session__write_header(session, evsel_list,
- output, false);
+ file->fd, false);
if (err < 0)
goto out_delete_session;
}
@@ -455,11 +425,11 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
goto out_delete_session;
}
- rec->post_processing_offset = lseek(output, 0, SEEK_CUR);
+ rec->post_processing_offset = lseek(file->fd, 0, SEEK_CUR);
machine = &session->machines.host;
- if (opts->pipe_output) {
+ if (file->is_pipe) {
err = perf_event__synthesize_attrs(tool, session,
process_synthesized_event);
if (err < 0) {
@@ -476,7 +446,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
* return this more properly and also
* propagate errors that now are calling die()
*/
- err = perf_event__synthesize_tracing_data(tool, output, evsel_list,
+ err = perf_event__synthesize_tracing_data(tool, file->fd, evsel_list,
process_synthesized_event);
if (err <= 0) {
pr_err("Couldn't record tracing data.\n");
@@ -583,7 +553,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
fprintf(stderr,
"[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n",
(double)rec->bytes_written / 1024.0 / 1024.0,
- output_name,
+ file->path,
rec->bytes_written / 24);
return 0;
@@ -845,7 +815,7 @@ const struct option record_options[] = {
OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
"list of cpus to monitor"),
OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
- OPT_STRING('o', "output", &record.output_name, "file",
+ OPT_STRING('o', "output", &record.file.path, "file",
"output file name"),
OPT_BOOLEAN('i', "no-inherit", &record.opts.no_inherit,
"child tasks do not inherit counters"),
OpenPOWER on IntegriCloud