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perf tools: Add perf trace 

This adds perf trace into the set of perf tools.

It is written to fetch the tracepoint samples from perf events
and display them, according to the events information given by
the debugfs files through the util/trace* tools.

It is a rough first shot and doesn't yet handle the cpu,
timestamps fields and some other things.

Example:

 perf record -f -e workqueue:workqueue_execution:record -F 1 -a
 perf trace

       kblockd/0-236   [000]     0.000000: workqueue_execution: thread=:236 func=cfq_kick_queue+0x0
     kondemand/0-360   [000]     0.000000: workqueue_execution: thread=:360 func=do_dbs_timer+0x0
     kondemand/0-360   [000]     0.000000: workqueue_execution: thread=:360 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0

Todo:

- A lot of things!

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: "Luis Claudio R. Goncalves" <lclaudio@uudg.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Jon Masters <jonathan@jonmasters.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Zhaolei <zhaolei@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Anton Blanchard <anton@samba.org>
LKML-Reference: <1250518688-7207-4-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2009-08-17 16:18:08 +02:00 committed by Ingo Molnar
parent ea4010d136
commit 5f9c39dca5
5 changed files with 287 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/Makefile
View File

@ -347,6 +347,9 @@ LIB_OBJS += util/values.o
LIB_OBJS += util/debug.o
LIB_OBJS += util/map.o
LIB_OBJS += util/thread.o
LIB_OBJS += util/trace-event-parse.o
LIB_OBJS += util/trace-event-read.o
LIB_OBJS += util/trace-event-info.o
BUILTIN_OBJS += builtin-annotate.o
BUILTIN_OBJS += builtin-help.o
@ -355,6 +358,7 @@ BUILTIN_OBJS += builtin-record.o
BUILTIN_OBJS += builtin-report.o
BUILTIN_OBJS += builtin-stat.o
BUILTIN_OBJS += builtin-top.o
BUILTIN_OBJS += builtin-trace.o
PERFLIBS = $(LIB_FILE)

4
tools/perf/builtin-record.c
View File

@ -17,6 +17,7 @@
#include "util/header.h"
#include "util/event.h"
#include "util/debug.h"
#include "util/trace-event.h"
#include <unistd.h>
#include <sched.h>
@ -519,6 +520,9 @@ static int __cmd_record(int argc, const char **argv)
signal(SIGCHLD, sig_handler);
signal(SIGINT, sig_handler);
if (raw_samples)
read_tracing_data();
if (!stat(output_name, &st) && st.st_size) {
if (!force && !append_file) {
fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n",

277
tools/perf/builtin-trace.c Normal file
View File

@ -0,0 +1,277 @@
#include "builtin.h"
#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
#include "util/parse-options.h"
#include "perf.h"
#include "util/debug.h"
#include "util/trace-event.h"
static char const *input_name = "perf.data";
static int input;
static unsigned long page_size;
static unsigned long mmap_window = 32;
static unsigned long total = 0;
static unsigned long total_comm = 0;
static struct rb_root threads;
static struct thread *last_match;
static struct perf_header *header;
static u64 sample_type;
static int
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
{
struct thread *thread;
thread = threads__findnew(event->comm.pid, &threads, &last_match);
dump_printf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->comm.comm, event->comm.pid);
if (thread == NULL ||
thread__set_comm(thread, event->comm.comm)) {
dump_printf("problem processing PERF_EVENT_COMM, skipping event.\n");
return -1;
}
total_comm++;
return 0;
}
static int
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
char level;
int show = 0;
struct dso *dso = NULL;
struct thread *thread;
u64 ip = event->ip.ip;
u64 period = 1;
void *more_data = event->ip.__more_data;
int cpumode;
thread = threads__findnew(event->ip.pid, &threads, &last_match);
if (sample_type & PERF_SAMPLE_PERIOD) {
period = *(u64 *)more_data;
more_data += sizeof(u64);
}
dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->header.misc,
event->ip.pid, event->ip.tid,
(void *)(long)ip,
(long long)period);
dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
if (thread == NULL) {
eprintf("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;
if (cpumode == PERF_EVENT_MISC_KERNEL) {
show = SHOW_KERNEL;
level = 'k';
dso = kernel_dso;
dump_printf(" ...... dso: %s\n", dso->name);
} else if (cpumode == PERF_EVENT_MISC_USER) {
show = SHOW_USER;
level = '.';
} else {
show = SHOW_HV;
level = 'H';
dso = hypervisor_dso;
dump_printf(" ...... dso: [hypervisor]\n");
}
if (sample_type & PERF_SAMPLE_RAW) {
struct {
u32 size;
char data[0];
} *raw = more_data;
/*
* FIXME: better resolve from pid from the struct trace_entry
* field, although it should be the same than this perf
* event pid
*/
print_event(0, raw->data, raw->size, 0, thread->comm);
}
total += period;
return 0;
}
static int
process_event(event_t *event, unsigned long offset, unsigned long head)
{
trace_event(event);
switch (event->header.type) {
case PERF_EVENT_MMAP ... PERF_EVENT_LOST:
return 0;
case PERF_EVENT_COMM:
return process_comm_event(event, offset, head);
case PERF_EVENT_EXIT ... PERF_EVENT_READ:
return 0;
case PERF_EVENT_SAMPLE:
return process_sample_event(event, offset, head);
case PERF_EVENT_MAX:
default:
return -1;
}
return 0;
}
static int __cmd_trace(void)
{
int ret, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head = 0;
struct stat perf_stat;
event_t *event;
uint32_t size;
char *buf;
trace_report();
input = open(input_name, O_RDONLY);
if (input < 0) {
perror("failed to open file");
exit(-1);
}
ret = fstat(input, &perf_stat);
if (ret < 0) {
perror("failed to stat file");
exit(-1);
}
if (!perf_stat.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
}
header = perf_header__read(input);
sample_type = perf_header__sample_type(header);
if (load_kernel() < 0) {
perror("failed to load kernel symbols");
return EXIT_FAILURE;
}
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 res;
res = munmap(buf, page_size * mmap_window);
assert(res == 0);
offset += shift;
head -= shift;
goto remap;
}
size = event->header.size;
if (!size || process_event(event, offset, head) < 0) {
/*
* 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)perf_stat.st_size)
goto more;
rc = EXIT_SUCCESS;
close(input);
return rc;
}
static const char * const annotate_usage[] = {
"perf trace [<options>] <command>",
NULL
};
static const struct option options[] = {
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
};
int cmd_trace(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
page_size = getpagesize();
argc = parse_options(argc, argv, options, annotate_usage, 0);
if (argc) {
/*
* Special case: if there's an argument left then assume tha
* it's a symbol filter:
*/
if (argc > 1)
usage_with_options(annotate_usage, options);
}
setup_pager();
return __cmd_trace();
}

1
tools/perf/perf.c
View File

@ -292,6 +292,7 @@ static void handle_internal_command(int argc, const char **argv)
{ "top", cmd_top, 0 },
{ "annotate", cmd_annotate, 0 },
{ "version", cmd_version, 0 },
{ "trace", cmd_trace, 0 },
};
unsigned int i;
static const char ext[] = STRIP_EXTENSION;

1
tools/perf/util/util.h
View File

@ -311,6 +311,7 @@ static inline int has_extension(const char *filename, const char *ext)
#undef isspace
#undef isdigit
#undef isalpha
#undef isprint
#undef isalnum
#undef tolower
#undef toupper