mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Tom Zanussi](/assets/img/avatar_default.png)
And some minor whitespace cleanup. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: rostedt@goodmis.org Cc: lizf@cn.fujitsu.com Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1254808849-7829-2-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
291 lines
5.9 KiB
C
291 lines
5.9 KiB
C
#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_RECORD_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_RECORD_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 timestamp = -1;
|
|
u32 cpu = -1;
|
|
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_TIME) {
|
|
timestamp = *(u64 *)more_data;
|
|
more_data += sizeof(u64);
|
|
}
|
|
|
|
if (sample_type & PERF_SAMPLE_CPU) {
|
|
cpu = *(u32 *)more_data;
|
|
more_data += sizeof(u32);
|
|
more_data += sizeof(u32); /* reserved */
|
|
}
|
|
|
|
if (sample_type & PERF_SAMPLE_PERIOD) {
|
|
period = *(u64 *)more_data;
|
|
more_data += sizeof(u64);
|
|
}
|
|
|
|
dump_printf("%p [%p]: PERF_RECORD_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_RECORD_MISC_CPUMODE_MASK;
|
|
|
|
if (cpumode == PERF_RECORD_MISC_KERNEL) {
|
|
show = SHOW_KERNEL;
|
|
level = 'k';
|
|
|
|
dso = kernel_dso;
|
|
|
|
dump_printf(" ...... dso: %s\n", dso->name);
|
|
|
|
} else if (cpumode == PERF_RECORD_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(cpu, raw->data, raw->size, timestamp, 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_RECORD_MMAP ... PERF_RECORD_LOST:
|
|
return 0;
|
|
|
|
case PERF_RECORD_COMM:
|
|
return process_comm_event(event, offset, head);
|
|
|
|
case PERF_RECORD_EXIT ... PERF_RECORD_READ:
|
|
return 0;
|
|
|
|
case PERF_RECORD_SAMPLE:
|
|
return process_sample_event(event, offset, head);
|
|
|
|
case PERF_RECORD_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();
|
|
register_idle_thread(&threads, &last_match);
|
|
|
|
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);
|
|
head = header->data_offset;
|
|
sample_type = perf_header__sample_type(header);
|
|
|
|
if (!(sample_type & PERF_SAMPLE_RAW))
|
|
die("No trace sample to read. Did you call perf record "
|
|
"without -R?");
|
|
|
|
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);
|
|
|
|
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)"),
|
|
OPT_END()
|
|
};
|
|
|
|
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();
|
|
}
|