Commit 5cbd0805 authored by Li Zefan's avatar Li Zefan Committed by Ingo Molnar

perf timechart: Remove open-coded event parsing code

Convert builtin-timechart.c to mmap_dispatch_perf_file() +
perf_file_handler.
Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Acked-by: default avatarArjan van de Ven <arjan@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4B14B21C.2040406@cn.fujitsu.com>
[ v2: cleaned up the printout, fixed a whitespace detail ]
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bab81b62
......@@ -29,14 +29,14 @@
#include "util/header.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
#include "util/event.h"
#include "util/data_map.h"
#include "util/svghelper.h"
static char const *input_name = "perf.data";
static char const *output_name = "output.svg";
static unsigned long page_size;
static unsigned long mmap_window = 32;
static u64 sample_type;
static unsigned int numcpus;
......@@ -49,8 +49,6 @@ static u64 first_time, last_time;
static int power_only;
static struct perf_header *header;
struct per_pid;
struct per_pidcomm;
......@@ -156,9 +154,9 @@ struct sample_wrapper *all_samples;
struct process_filter;
struct process_filter {
char *name;
int pid;
struct process_filter *next;
char *name;
int pid;
struct process_filter *next;
};
static struct process_filter *process_filter;
......@@ -1045,36 +1043,6 @@ static void write_svg_file(const char *filename)
svg_close();
}
static int
process_event(event_t *event)
{
switch (event->header.type) {
case PERF_RECORD_COMM:
return process_comm_event(event);
case PERF_RECORD_FORK:
return process_fork_event(event);
case PERF_RECORD_EXIT:
return process_exit_event(event);
case PERF_RECORD_SAMPLE:
return queue_sample_event(event);
/*
* We dont process them right now but they are fine:
*/
case PERF_RECORD_MMAP:
case PERF_RECORD_THROTTLE:
case PERF_RECORD_UNTHROTTLE:
return 0;
default:
return -1;
}
return 0;
}
static void process_samples(void)
{
struct sample_wrapper *cursor;
......@@ -1090,114 +1058,38 @@ static void process_samples(void)
}
}
static int __cmd_timechart(void)
static int sample_type_check(u64 type)
{
int err, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head, shift;
struct stat statbuf;
event_t *event;
uint32_t size;
char *buf;
int input;
input = open(input_name, O_RDONLY);
if (input < 0) {
fprintf(stderr, " failed to open file: %s", input_name);
if (!strcmp(input_name, "perf.data"))
fprintf(stderr, " (try 'perf record' first)");
fprintf(stderr, "\n");
exit(-1);
}
err = fstat(input, &statbuf);
if (err < 0) {
perror("failed to stat file");
exit(-1);
}
if (!statbuf.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
}
sample_type = type;
header = perf_header__new();
if (header == NULL)
return -ENOMEM;
err = perf_header__read(header, input);
if (err < 0) {
perf_header__delete(header);
return err;
}
head = header->data_offset;
sample_type = perf_header__sample_type(header);
shift = page_size * (head / page_size);
offset += shift;
head -= shift;
remap:
buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
MAP_SHARED, input, offset);
if (buf == MAP_FAILED) {
perror("failed to mmap file");
exit(-1);
}
more:
event = (event_t *)(buf + head);
size = event->header.size;
if (!size)
size = 8;
if (head + event->header.size >= page_size * mmap_window) {
int ret2;
shift = page_size * (head / page_size);
ret2 = munmap(buf, page_size * mmap_window);
assert(ret2 == 0);
offset += shift;
head -= shift;
goto remap;
}
size = event->header.size;
if (!size || process_event(event) < 0) {
pr_warning("%p [%p]: skipping unknown header type: %d\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->header.type);
/*
* assume we lost track of the stream, check alignment, and
* increment a single u64 in the hope to catch on again 'soon'.
*/
if (unlikely(head & 7))
head &= ~7ULL;
size = 8;
if (!(sample_type & PERF_SAMPLE_RAW)) {
fprintf(stderr, "No trace samples found in the file.\n"
"Have you used 'perf timechart record' to record it?\n");
return -1;
}
head += size;
return 0;
}
if (offset + head >= header->data_offset + header->data_size)
goto done;
static struct perf_file_handler file_handler = {
.process_comm_event = process_comm_event,
.process_fork_event = process_fork_event,
.process_exit_event = process_exit_event,
.process_sample_event = queue_sample_event,
.sample_type_check = sample_type_check,
};
if (offset + head < (unsigned long)statbuf.st_size)
goto more;
static int __cmd_timechart(void)
{
struct perf_header *header;
int ret;
done:
rc = EXIT_SUCCESS;
close(input);
register_perf_file_handler(&file_handler);
ret = mmap_dispatch_perf_file(&header, input_name, 0, 0,
&event__cwdlen, &event__cwd);
if (ret)
return EXIT_FAILURE;
process_samples();
......@@ -1210,7 +1102,7 @@ static int __cmd_timechart(void)
pr_info("Written %2.1f seconds of trace to %s.\n",
(last_time - first_time) / 1000000000.0, output_name);
return rc;
return EXIT_SUCCESS;
}
static const char * const timechart_usage[] = {
......@@ -1277,8 +1169,6 @@ int cmd_timechart(int argc, const char **argv, const char *prefix __used)
{
symbol__init(0);
page_size = getpagesize();
argc = parse_options(argc, argv, options, timechart_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
......
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