hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

perf tools: Add perf_data_file__open interface to data object 

Adding perf_data_file__open interface to data object to open the
perf.data file for both read and write.

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/1381847254-28809-3-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 16:27:33 +02:00 committed by Arnaldo Carvalho de Melo
parent f5fc14124c
commit 6a4d98d787
7 changed files with 158 additions and 107 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/perf/Makefile.perf
View File

@ -365,6 +365,7 @@ LIB_OBJS += $(OUTPUT)util/vdso.o
LIB_OBJS += $(OUTPUT)util/stat.o
LIB_OBJS += $(OUTPUT)util/record.o
LIB_OBJS += $(OUTPUT)util/srcline.o
LIB_OBJS += $(OUTPUT)util/data.o
LIB_OBJS += $(OUTPUT)ui/setup.o
LIB_OBJS += $(OUTPUT)ui/helpline.o

34
tools/perf/builtin-record.c
View File

@ -345,8 +345,6 @@ out:
static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
{
struct stat st;
int flags;
int err, feat;
unsigned long waking = 0;
const bool forks = argc > 0;
@ -355,7 +353,6 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
struct perf_record_opts *opts = &rec->opts;
struct perf_evlist *evsel_list = rec->evlist;
struct perf_data_file *file = &rec->file;
const char *output_name = file->path;
struct perf_session *session;
bool disabled = false;
@ -367,35 +364,6 @@ 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))
file->is_pipe = true;
else
file->path = output_name = "perf.data";
}
if (output_name) {
if (!strcmp(output_name, "-"))
file->is_pipe = 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 (file->is_pipe)
file->fd = STDOUT_FILENO;
else
file->fd = open(output_name, flags, S_IRUSR | S_IWUSR);
if (file->fd < 0) {
perror("failed to create output file");
return -1;
}
session = perf_session__new(file, false, NULL);
if (session == NULL) {
pr_err("Not enough memory for reading perf file header\n");
@ -586,7 +554,7 @@ 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;

9
tools/perf/builtin-top.c
View File

@ -929,15 +929,8 @@ static int __cmd_top(struct perf_top *top)
struct perf_record_opts *opts = &top->record_opts;
pthread_t thread;
int ret;
struct perf_data_file file = {
.mode = PERF_DATA_MODE_WRITE,
};
/*
* FIXME: perf_session__new should allow passing a O_MMAP, so that all this
* mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
*/
top->session = perf_session__new(&file, false, NULL);
top->session = perf_session__new(NULL, false, NULL);
if (top->session == NULL)
return -ENOMEM;

120
tools/perf/util/data.c Normal file
View File

@ -0,0 +1,120 @@
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include "data.h"
#include "util.h"
static bool check_pipe(struct perf_data_file *file)
{
struct stat st;
bool is_pipe = false;
int fd = perf_data_file__is_read(file) ?
STDIN_FILENO : STDOUT_FILENO;
if (!file->path) {
if (!fstat(fd, &st) && S_ISFIFO(st.st_mode))
is_pipe = true;
} else {
if (!strcmp(file->path, "-"))
is_pipe = true;
}
if (is_pipe)
file->fd = fd;
return file->is_pipe = is_pipe;
}
static int check_backup(struct perf_data_file *file)
{
struct stat st;
if (!stat(file->path, &st) && st.st_size) {
/* TODO check errors properly */
char oldname[PATH_MAX];
snprintf(oldname, sizeof(oldname), "%s.old",
file->path);
unlink(oldname);
rename(file->path, oldname);
}
return 0;
}
static int open_file_read(struct perf_data_file *file)
{
struct stat st;
int fd;
fd = open(file->path, O_RDONLY);
if (fd < 0) {
int err = errno;
pr_err("failed to open %s: %s", file->path, strerror(err));
if (err == ENOENT && !strcmp(file->path, "perf.data"))
pr_err(" (try 'perf record' first)");
pr_err("\n");
return -err;
}
if (fstat(fd, &st) < 0)
goto out_close;
if (!file->force && st.st_uid && (st.st_uid != geteuid())) {
pr_err("file %s not owned by current user or root\n",
file->path);
goto out_close;
}
if (!st.st_size) {
pr_info("zero-sized file (%s), nothing to do!\n",
file->path);
goto out_close;
}
file->size = st.st_size;
return fd;
out_close:
close(fd);
return -1;
}
static int open_file_write(struct perf_data_file *file)
{
if (check_backup(file))
return -1;
return open(file->path, O_CREAT|O_RDWR|O_TRUNC, S_IRUSR|S_IWUSR);
}
static int open_file(struct perf_data_file *file)
{
int fd;
fd = perf_data_file__is_read(file) ?
open_file_read(file) : open_file_write(file);
file->fd = fd;
return fd < 0 ? -1 : 0;
}
int perf_data_file__open(struct perf_data_file *file)
{
if (check_pipe(file))
return 0;
if (!file->path)
file->path = "perf.data";
return open_file(file);
}
void perf_data_file__close(struct perf_data_file *file)
{
close(file->fd);
}

4
tools/perf/util/data.h
View File

@ -13,6 +13,7 @@ struct perf_data_file {
int fd;
bool is_pipe;
bool force;
unsigned long size;
enum perf_data_mode mode;
};
@ -26,4 +27,7 @@ static inline bool perf_data_file__is_write(struct perf_data_file *file)
return file->mode == PERF_DATA_MODE_WRITE;
}
int perf_data_file__open(struct perf_data_file *file);
void perf_data_file__close(struct perf_data_file *file);
#endif /* __PERF_DATA_H */

95
tools/perf/util/session.c
View File

@ -16,73 +16,35 @@
#include "perf_regs.h"
#include "vdso.h"
static int perf_session__open(struct perf_session *self, bool force)
static int perf_session__open(struct perf_session *self)
{
struct stat input_stat;
if (!strcmp(self->filename, "-")) {
self->fd_pipe = true;
self->fd = STDIN_FILENO;
if (self->fd_pipe) {
if (perf_session__read_header(self) < 0)
pr_err("incompatible file format (rerun with -v to learn more)");
return 0;
}
self->fd = open(self->filename, O_RDONLY);
if (self->fd < 0) {
int err = errno;
pr_err("failed to open %s: %s", self->filename, strerror(err));
if (err == ENOENT && !strcmp(self->filename, "perf.data"))
pr_err(" (try 'perf record' first)");
pr_err("\n");
return -errno;
}
if (fstat(self->fd, &input_stat) < 0)
goto out_close;
if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
pr_err("file %s not owned by current user or root\n",
self->filename);
goto out_close;
}
if (!input_stat.st_size) {
pr_info("zero-sized file (%s), nothing to do!\n",
self->filename);
goto out_close;
}
if (perf_session__read_header(self) < 0) {
pr_err("incompatible file format (rerun with -v to learn more)");
goto out_close;
return -1;
}
if (!perf_evlist__valid_sample_type(self->evlist)) {
pr_err("non matching sample_type");
goto out_close;
return -1;
}
if (!perf_evlist__valid_sample_id_all(self->evlist)) {
pr_err("non matching sample_id_all");
goto out_close;
return -1;
}
if (!perf_evlist__valid_read_format(self->evlist)) {
pr_err("non matching read_format");
goto out_close;
return -1;
}
self->size = input_stat.st_size;
return 0;
out_close:
close(self->fd);
self->fd = -1;
return -1;
}
void perf_session__set_id_hdr_size(struct perf_session *session)
@ -110,35 +72,35 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
bool repipe, struct perf_tool *tool)
{
struct perf_session *self;
const char *filename = file->path;
struct stat st;
size_t len;
if (!filename || !strlen(filename)) {
if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
filename = "-";
else
filename = "perf.data";
}
len = strlen(filename);
self = zalloc(sizeof(*self) + len);
if (self == NULL)
self = zalloc(sizeof(*self));
if (!self)
goto out;
memcpy(self->filename, filename, len);
self->repipe = repipe;
INIT_LIST_HEAD(&self->ordered_samples.samples);
INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
INIT_LIST_HEAD(&self->ordered_samples.to_free);
machines__init(&self->machines);
if (perf_data_file__is_read(file)) {
if (perf_session__open(self, file->force) < 0)
if (file) {
if (perf_data_file__open(file))
goto out_delete;
perf_session__set_id_hdr_size(self);
} else if (perf_data_file__is_write(file)) {
self->fd = file->fd;
self->fd_pipe = file->is_pipe;
self->filename = file->path;
self->size = file->size;
if (perf_data_file__is_read(file)) {
if (perf_session__open(self) < 0)
goto out_close;
perf_session__set_id_hdr_size(self);
}
}
if (!file || perf_data_file__is_write(file)) {
/*
* In O_RDONLY mode this will be performed when reading the
* kernel MMAP event, in perf_event__process_mmap().
@ -153,10 +115,13 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
tool->ordered_samples = false;
}
out:
return self;
out_delete:
out_close:
perf_data_file__close(file);
out_delete:
perf_session__delete(self);
out:
return NULL;
}

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

@ -39,7 +39,7 @@ struct perf_session {
bool fd_pipe;
bool repipe;
struct ordered_samples ordered_samples;
char filename[1];
const char *filename;
};
#define PRINT_IP_OPT_IP (1<<0)