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Date: Tue, 1 Dec 2009 07:30:52 GMT
From: tip-bot for Li Zefan <lizf@...fujitsu.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
lizf@...fujitsu.com, peterz@...radead.org, arjan@...radead.org,
fweisbec@...il.com, acme@...radead.org, tglx@...utronix.de,
mingo@...e.hu
Subject: [tip:perf/core] perf annotate: Fix perf data parsing
Commit-ID: bab81b624e970f1138535a465ad2b26b6bb0dd6c
Gitweb: http://git.kernel.org/tip/bab81b624e970f1138535a465ad2b26b6bb0dd6c
Author: Li Zefan <lizf@...fujitsu.com>
AuthorDate: Tue, 1 Dec 2009 14:04:49 +0800
Committer: Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 1 Dec 2009 08:14:08 +0100
perf annotate: Fix perf data parsing
perf-annotate doesn't parse perf.data correctly in that it
doesn't read perf header. Fix this by using
mmap_dispatch_perf_file().
Before:
TOTAL events: 17565
MMAP events: 3221
LOST events: 10
COMM events: 235
EXIT events: 2
THROTTLE events: 1
UNTHROTTLE events: 2
FORK events: 10
READ events: 1
SAMPLE events: 14083
After:
TOTAL events: 17290
MMAP events: 3203
LOST events: 0
COMM events: 234
EXIT events: 1
THROTTLE events: 0
UNTHROTTLE events: 0
FORK events: 0
READ events: 0
SAMPLE events: 13852
Signed-off-by: Li Zefan <lizf@...fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...radead.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Arjan van de Ven <arjan@...radead.org>
LKML-Reference: <4B14B201.9030708@...fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
tools/perf/builtin-annotate.c | 143 +++++-----------------------------------
tools/perf/util/event.c | 3 +-
2 files changed, 19 insertions(+), 127 deletions(-)
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 7f85c6e..0bf2e8f 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -25,19 +25,16 @@
#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"
+#include "util/data_map.h"
static char const *input_name = "perf.data";
static int force;
-static int input;
static int full_paths;
static int print_line;
-static unsigned long page_size;
-static unsigned long mmap_window = 32;
-
struct sym_hist {
u64 sum;
u64 ip[0];
@@ -156,35 +153,6 @@ static int process_sample_event(event_t *event)
return 0;
}
-static int event__process(event_t *self)
-{
- switch (self->header.type) {
- case PERF_RECORD_SAMPLE:
- return process_sample_event(self);
-
- case PERF_RECORD_MMAP:
- return event__process_mmap(self);
-
- case PERF_RECORD_COMM:
- return event__process_comm(self);
-
- case PERF_RECORD_FORK:
- return event__process_task(self);
- /*
- * We dont process them right now but they are fine:
- */
-
- case PERF_RECORD_THROTTLE:
- case PERF_RECORD_UNTHROTTLE:
- return 0;
-
- default:
- return -1;
- }
-
- return 0;
-}
-
static int parse_line(FILE *file, struct hist_entry *he, u64 len)
{
struct symbol *sym = he->sym;
@@ -485,99 +453,26 @@ static void find_annotations(void)
}
}
+static struct perf_file_handler file_handler = {
+ .process_sample_event = process_sample_event,
+ .process_mmap_event = event__process_mmap,
+ .process_comm_event = event__process_comm,
+ .process_fork_event = event__process_task,
+};
+
static int __cmd_annotate(void)
{
- int ret, rc = EXIT_FAILURE;
- unsigned long offset = 0;
- unsigned long head = 0;
- struct stat input_stat;
- event_t *event;
- uint32_t size;
- char *buf;
-
- register_idle_thread();
-
- input = open(input_name, O_RDONLY);
- if (input < 0) {
- perror("failed to open file");
- exit(-1);
- }
-
- ret = fstat(input, &input_stat);
- if (ret < 0) {
- perror("failed to stat file");
- exit(-1);
- }
-
- if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
- fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
- exit(-1);
- }
-
- if (!input_stat.st_size) {
- fprintf(stderr, "zero-sized file, nothing to do!\n");
- exit(0);
- }
-
-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) {
- unsigned long shift = page_size * (head / page_size);
- int munmap_ret;
-
- munmap_ret = munmap(buf, page_size * mmap_window);
- assert(munmap_ret == 0);
-
- offset += shift;
- head -= shift;
- goto remap;
- }
-
- size = event->header.size;
-
- dump_printf("%p [%p]: event: %d\n",
- (void *)(offset + head),
- (void *)(long)event->header.size,
- event->header.type);
-
- if (!size || event__process(event) < 0) {
-
- dump_printf("%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;
- }
-
- head += size;
-
- if (offset + head < (unsigned long)input_stat.st_size)
- goto more;
+ struct perf_header *header;
+ struct thread *idle;
+ int ret;
- rc = EXIT_SUCCESS;
- close(input);
+ idle = register_idle_thread();
+ register_perf_file_handler(&file_handler);
+ ret = mmap_dispatch_perf_file(&header, input_name, 0, 0,
+ &event__cwdlen, &event__cwd);
+ if (ret)
+ return ret;
if (dump_trace) {
event__print_totals();
@@ -595,7 +490,7 @@ more:
find_annotations();
- return rc;
+ return ret;
}
static const char * const annotate_usage[] = {
@@ -644,8 +539,6 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __used)
if (symbol__init(&symbol_conf) < 0)
return -1;
- page_size = getpagesize();
-
argc = parse_options(argc, argv, options, annotate_usage, 0);
setup_sorting();
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 233d7ad..414b89d 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -186,8 +186,7 @@ int event__process_comm(event_t *self)
{
struct thread *thread = threads__findnew(self->comm.pid);
- dump_printf("PERF_RECORD_COMM: %s:%d\n",
- self->comm.comm, self->comm.pid);
+ dump_printf(": %s:%d\n", self->comm.comm, self->comm.pid);
if (thread == NULL || thread__set_comm(thread, self->comm.comm)) {
dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
--
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