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perf tools: Add data object to handle perf data file

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This patch is adding 'struct perf_data_file' object as a placeholder for
all attributes regarding perf.data file handling. Changing
perf_session__new to take it as an argument.

The rest of the functionality will be added later to keep this change
simple enough, because all the places using perf_session are changed
now.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1381847254-28809-2-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2013-10-15 16:27:32 +02:00
committed by Arnaldo Carvalho de Melo
parent 09600e0f9e
commit f5fc14124c
21 changed files with 186 additions and 73 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
tools/perf/builtin-record.c
View File

@@ -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;
@@ -84,8 +84,10 @@ 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 perf data, error: %m\n");
@@ -248,13 +250,15 @@ 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,
session->fd = file->fd;
return __perf_session__process_events(session, rec->post_processing_offset,
size - rec->post_processing_offset,
size, &build_id__mark_dso_hit_ops);
}
@@ -262,17 +266,18 @@ 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();
@@ -342,14 +347,15 @@ 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;
const char *output_name = file->path;
struct perf_session *session;
bool disabled = false;
@@ -363,13 +369,13 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
if (!output_name) {
if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
opts->pipe_output = true;
file->is_pipe = true;
else
rec->output_name = output_name = "perf.data";
file->path = output_name = "perf.data";
}
if (output_name) {
if (!strcmp(output_name, "-"))
opts->pipe_output = true;
file->is_pipe = true;
else if (!stat(output_name, &st) && st.st_size) {
char oldname[PATH_MAX];
snprintf(oldname, sizeof(oldname), "%s.old",
@@ -381,19 +387,16 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
flags = O_CREAT|O_RDWR|O_TRUNC;
if (opts->pipe_output)
output = STDOUT_FILENO;
if (file->is_pipe)
file->fd = STDOUT_FILENO;
else
output = open(output_name, flags, S_IRUSR | S_IWUSR);
if (output < 0) {
file->fd = open(output_name, flags, S_IRUSR | S_IWUSR);
if (file->fd < 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 +418,7 @@ 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 +439,13 @@ 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 +458,11 @@ 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 +479,7 @@ 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");
@@ -845,7 +848,7 @@ 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"),