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Merge branch 'perfcounters/tracing' into perfcounters/core

Browse source 
Merge reason: this topic is ready now to merge into the main
              development branch for .32, with functional
              perf trace output.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-08-31 10:03:25 +02:00
commit 19c959627a
12 changed files with 4569 additions and 10 deletions
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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)

12
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>
@ -546,6 +547,17 @@ static int __cmd_record(int argc, const char **argv)
else
header = perf_header__new();
if (raw_samples) {
read_tracing_data(attrs, nr_counters);
} else {
for (i = 0; i < nr_counters; i++) {
if (attrs[i].sample_type & PERF_SAMPLE_RAW) {
read_tracing_data(attrs, nr_counters);
break;
}
}
}
atexit(atexit_header);
if (!system_wide) {

2
tools/perf/builtin-report.c
View file

@ -1428,7 +1428,7 @@ static int __cmd_report(void)
exit(-1);
}
if (callchain) {
fprintf(stderr, "selected -c but no callchain data."
fprintf(stderr, "selected -g but no callchain data."
" Did you call perf record without"
" -g?\n");
exit(-1);

282
tools/perf/builtin-trace.c Normal file
View file

@ -0,0 +1,282 @@
#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 (!(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);
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)"),
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();
}

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;

47
tools/perf/util/parse-events.c
View file

@ -158,9 +158,9 @@ int valid_debugfs_mount(const char *debugfs)
return 0;
}
static const char *tracepoint_id_to_name(u64 config)
struct tracepoint_path *tracepoint_id_to_path(u64 config)
{
static char tracepoint_name[2 * MAX_EVENT_LENGTH];
struct tracepoint_path *path = NULL;
DIR *sys_dir, *evt_dir;
struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
struct stat st;
@ -170,7 +170,7 @@ static const char *tracepoint_id_to_name(u64 config)
char evt_path[MAXPATHLEN];
if (valid_debugfs_mount(debugfs_path))
return "unkown";
return NULL;
sys_dir = opendir(debugfs_path);
if (!sys_dir)
@ -197,10 +197,23 @@ static const char *tracepoint_id_to_name(u64 config)
if (id == config) {
closedir(evt_dir);
closedir(sys_dir);
snprintf(tracepoint_name, 2 * MAX_EVENT_LENGTH,
"%s:%s", sys_dirent.d_name,
evt_dirent.d_name);
return tracepoint_name;
path = calloc(1, sizeof(path));
path->system = malloc(MAX_EVENT_LENGTH);
if (!path->system) {
free(path);
return NULL;
}
path->name = malloc(MAX_EVENT_LENGTH);
if (!path->name) {
free(path->system);
free(path);
return NULL;
}
strncpy(path->system, sys_dirent.d_name,
MAX_EVENT_LENGTH);
strncpy(path->name, evt_dirent.d_name,
MAX_EVENT_LENGTH);
return path;
}
}
closedir(evt_dir);
@ -208,7 +221,25 @@ static const char *tracepoint_id_to_name(u64 config)
cleanup:
closedir(sys_dir);
return "unkown";
return NULL;
}
#define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
static const char *tracepoint_id_to_name(u64 config)
{
static char buf[TP_PATH_LEN];
struct tracepoint_path *path;
path = tracepoint_id_to_path(config);
if (path) {
snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
free(path->name);
free(path->system);
free(path);
} else
snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
return buf;
}
static int is_cache_op_valid(u8 cache_type, u8 cache_op)

13
tools/perf/util/parse-events.h
View file

@ -1,10 +1,19 @@
#ifndef _PARSE_EVENTS_H
#define _PARSE_EVENTS_H
/*
* Parse symbolic events/counts passed in as options:
*/
struct option;
struct tracepoint_path {
char *system;
char *name;
struct tracepoint_path *next;
};
extern struct tracepoint_path *tracepoint_id_to_path(u64 config);
extern int nr_counters;
extern struct perf_counter_attr attrs[MAX_COUNTERS];
@ -21,3 +30,5 @@ extern void print_events(void);
extern char debugfs_path[];
extern int valid_debugfs_mount(const char *debugfs);
#endif /* _PARSE_EVENTS_H */

539
tools/perf/util/trace-event-info.c Normal file
View file

@ -0,0 +1,539 @@
/*
* Copyright (C) 2008,2009, Steven Rostedt <srostedt@redhat.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License (not later!)
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#define _GNU_SOURCE
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <pthread.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <stdbool.h>
#include "../perf.h"
#include "trace-event.h"
#define VERSION "0.5"
#define _STR(x) #x
#define STR(x) _STR(x)
#define MAX_PATH 256
#define TRACE_CTRL "tracing_on"
#define TRACE "trace"
#define AVAILABLE "available_tracers"
#define CURRENT "current_tracer"
#define ITER_CTRL "trace_options"
#define MAX_LATENCY "tracing_max_latency"
unsigned int page_size;
static const char *output_file = "trace.info";
static int output_fd;
struct event_list {
struct event_list *next;
const char *event;
};
struct events {
struct events *sibling;
struct events *children;
struct events *next;
char *name;
};
static void die(const char *fmt, ...)
{
va_list ap;
int ret = errno;
if (errno)
perror("trace-cmd");
else
ret = -1;
va_start(ap, fmt);
fprintf(stderr, " ");
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(ret);
}
void *malloc_or_die(unsigned int size)
{
void *data;
data = malloc(size);
if (!data)
die("malloc");
return data;
}
static const char *find_debugfs(void)
{
static char debugfs[MAX_PATH+1];
static int debugfs_found;
char type[100];
FILE *fp;
if (debugfs_found)
return debugfs;
if ((fp = fopen("/proc/mounts","r")) == NULL)
die("Can't open /proc/mounts for read");
while (fscanf(fp, "%*s %"
STR(MAX_PATH)
"s %99s %*s %*d %*d\n",
debugfs, type) == 2) {
if (strcmp(type, "debugfs") == 0)
break;
}
fclose(fp);
if (strcmp(type, "debugfs") != 0)
die("debugfs not mounted, please mount");
debugfs_found = 1;
return debugfs;
}
/*
* Finds the path to the debugfs/tracing
* Allocates the string and stores it.
*/
static const char *find_tracing_dir(void)
{
static char *tracing;
static int tracing_found;
const char *debugfs;
if (tracing_found)
return tracing;
debugfs = find_debugfs();
tracing = malloc_or_die(strlen(debugfs) + 9);
sprintf(tracing, "%s/tracing", debugfs);
tracing_found = 1;
return tracing;
}
static char *get_tracing_file(const char *name)
{
const char *tracing;
char *file;
tracing = find_tracing_dir();
if (!tracing)
return NULL;
file = malloc_or_die(strlen(tracing) + strlen(name) + 2);
sprintf(file, "%s/%s", tracing, name);
return file;
}
static void put_tracing_file(char *file)
{
free(file);
}
static ssize_t write_or_die(const void *buf, size_t len)
{
int ret;
ret = write(output_fd, buf, len);
if (ret < 0)
die("writing to '%s'", output_file);
return ret;
}
int bigendian(void)
{
unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
unsigned int *ptr;
ptr = (unsigned int *)str;
return *ptr == 0x01020304;
}
static unsigned long long copy_file_fd(int fd)
{
unsigned long long size = 0;
char buf[BUFSIZ];
int r;
do {
r = read(fd, buf, BUFSIZ);
if (r > 0) {
size += r;
write_or_die(buf, r);
}
} while (r > 0);
return size;
}
static unsigned long long copy_file(const char *file)
{
unsigned long long size = 0;
int fd;
fd = open(file, O_RDONLY);
if (fd < 0)
die("Can't read '%s'", file);
size = copy_file_fd(fd);
close(fd);
return size;
}
static unsigned long get_size_fd(int fd)
{
unsigned long long size = 0;
char buf[BUFSIZ];
int r;
do {
r = read(fd, buf, BUFSIZ);
if (r > 0)
size += r;
} while (r > 0);
lseek(fd, 0, SEEK_SET);
return size;
}
static unsigned long get_size(const char *file)
{
unsigned long long size = 0;
int fd;
fd = open(file, O_RDONLY);
if (fd < 0)
die("Can't read '%s'", file);
size = get_size_fd(fd);
close(fd);
return size;
}
static void read_header_files(void)
{
unsigned long long size, check_size;
char *path;
int fd;
path = get_tracing_file("events/header_page");
fd = open(path, O_RDONLY);
if (fd < 0)
die("can't read '%s'", path);
/* unfortunately, you can not stat debugfs files for size */
size = get_size_fd(fd);
write_or_die("header_page", 12);
write_or_die(&size, 8);
check_size = copy_file_fd(fd);
if (size != check_size)
die("wrong size for '%s' size=%lld read=%lld",
path, size, check_size);
put_tracing_file(path);
path = get_tracing_file("events/header_event");
fd = open(path, O_RDONLY);
if (fd < 0)
die("can't read '%s'", path);
size = get_size_fd(fd);
write_or_die("header_event", 13);
write_or_die(&size, 8);
check_size = copy_file_fd(fd);
if (size != check_size)
die("wrong size for '%s'", path);
put_tracing_file(path);
}
static bool name_in_tp_list(char *sys, struct tracepoint_path *tps)
{
while (tps) {
if (!strcmp(sys, tps->name))
return true;
tps = tps->next;
}
return false;
}
static void copy_event_system(const char *sys, struct tracepoint_path *tps)
{
unsigned long long size, check_size;
struct dirent *dent;
struct stat st;
char *format;
DIR *dir;
int count = 0;
int ret;
dir = opendir(sys);
if (!dir)
die("can't read directory '%s'", sys);
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
!name_in_tp_list(dent->d_name, tps))
continue;
format = malloc_or_die(strlen(sys) + strlen(dent->d_name) + 10);
sprintf(format, "%s/%s/format", sys, dent->d_name);
ret = stat(format, &st);
free(format);
if (ret < 0)
continue;
count++;
}
write_or_die(&count, 4);
rewinddir(dir);
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
!name_in_tp_list(dent->d_name, tps))
continue;
format = malloc_or_die(strlen(sys) + strlen(dent->d_name) + 10);
sprintf(format, "%s/%s/format", sys, dent->d_name);
ret = stat(format, &st);
if (ret >= 0) {
/* unfortunately, you can not stat debugfs files for size */
size = get_size(format);
write_or_die(&size, 8);
check_size = copy_file(format);
if (size != check_size)
die("error in size of file '%s'", format);
}
free(format);
}
}
static void read_ftrace_files(struct tracepoint_path *tps)
{
char *path;
path = get_tracing_file("events/ftrace");
copy_event_system(path, tps);
put_tracing_file(path);
}
static bool system_in_tp_list(char *sys, struct tracepoint_path *tps)
{
while (tps) {
if (!strcmp(sys, tps->system))
return true;
tps = tps->next;
}
return false;
}
static void read_event_files(struct tracepoint_path *tps)
{
struct dirent *dent;
struct stat st;
char *path;
char *sys;
DIR *dir;
int count = 0;
int ret;
path = get_tracing_file("events");
dir = opendir(path);
if (!dir)
die("can't read directory '%s'", path);
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
strcmp(dent->d_name, "ftrace") == 0 ||
!system_in_tp_list(dent->d_name, tps))
continue;
sys = malloc_or_die(strlen(path) + strlen(dent->d_name) + 2);
sprintf(sys, "%s/%s", path, dent->d_name);
ret = stat(sys, &st);
free(sys);
if (ret < 0)
continue;
if (S_ISDIR(st.st_mode))
count++;
}
write_or_die(&count, 4);
rewinddir(dir);
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
strcmp(dent->d_name, "ftrace") == 0 ||
!system_in_tp_list(dent->d_name, tps))
continue;
sys = malloc_or_die(strlen(path) + strlen(dent->d_name) + 2);
sprintf(sys, "%s/%s", path, dent->d_name);
ret = stat(sys, &st);
if (ret >= 0) {
if (S_ISDIR(st.st_mode)) {
write_or_die(dent->d_name, strlen(dent->d_name) + 1);
copy_event_system(sys, tps);
}
}
free(sys);
}
put_tracing_file(path);
}
static void read_proc_kallsyms(void)
{
unsigned int size, check_size;
const char *path = "/proc/kallsyms";
struct stat st;
int ret;
ret = stat(path, &st);
if (ret < 0) {
/* not found */
size = 0;
write_or_die(&size, 4);
return;
}
size = get_size(path);
write_or_die(&size, 4);
check_size = copy_file(path);
if (size != check_size)
die("error in size of file '%s'", path);
}
static void read_ftrace_printk(void)
{
unsigned int size, check_size;
const char *path;
struct stat st;
int ret;
path = get_tracing_file("printk_formats");
ret = stat(path, &st);
if (ret < 0) {
/* not found */
size = 0;
write_or_die(&size, 4);
return;
}
size = get_size(path);
write_or_die(&size, 4);
check_size = copy_file(path);
if (size != check_size)
die("error in size of file '%s'", path);
}
static struct tracepoint_path *
get_tracepoints_path(struct perf_counter_attr *pattrs, int nb_counters)
{
struct tracepoint_path path, *ppath = &path;
int i;
for (i = 0; i < nb_counters; i++) {
if (pattrs[i].type != PERF_TYPE_TRACEPOINT)
continue;
ppath->next = tracepoint_id_to_path(pattrs[i].config);
if (!ppath->next)
die("%s\n", "No memory to alloc tracepoints list");
ppath = ppath->next;
}
return path.next;
}
void read_tracing_data(struct perf_counter_attr *pattrs, int nb_counters)
{
char buf[BUFSIZ];
struct tracepoint_path *tps;
output_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE, 0644);
if (output_fd < 0)
die("creating file '%s'", output_file);
buf[0] = 23;
buf[1] = 8;
buf[2] = 68;
memcpy(buf + 3, "tracing", 7);
write_or_die(buf, 10);
write_or_die(VERSION, strlen(VERSION) + 1);
/* save endian */
if (bigendian())
buf[0] = 1;
else
buf[0] = 0;
write_or_die(buf, 1);
/* save size of long */
buf[0] = sizeof(long);
write_or_die(buf, 1);
/* save page_size */
page_size = getpagesize();
write_or_die(&page_size, 4);
tps = get_tracepoints_path(pattrs, nb_counters);
read_header_files();
read_ftrace_files(tps);
read_event_files(tps);
read_proc_kallsyms();
read_ftrace_printk();
}

2930
tools/perf/util/trace-event-parse.c Normal file
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509
tools/perf/util/trace-event-read.c Normal file
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@ -0,0 +1,509 @@
/*
* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License (not later!)
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#define _LARGEFILE64_SOURCE
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <pthread.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include "../perf.h"
#include "util.h"
#include "trace-event.h"
static int input_fd;
static int read_page;
int file_bigendian;
int host_bigendian;
static int long_size;
static unsigned long page_size;
static int read_or_die(void *data, int size)
{
int r;
r = read(input_fd, data, size);
if (r != size)
die("reading input file (size expected=%d received=%d)",
size, r);
return r;
}
static unsigned int read4(void)
{
unsigned int data;
read_or_die(&data, 4);
return __data2host4(data);
}
static unsigned long long read8(void)
{
unsigned long long data;
read_or_die(&data, 8);
return __data2host8(data);
}
static char *read_string(void)
{
char buf[BUFSIZ];
char *str = NULL;
int size = 0;
int i;
int r;
for (;;) {
r = read(input_fd, buf, BUFSIZ);
if (r < 0)
die("reading input file");
if (!r)
die("no data");
for (i = 0; i < r; i++) {
if (!buf[i])
break;
}
if (i < r)
break;
if (str) {
size += BUFSIZ;
str = realloc(str, size);
if (!str)
die("malloc of size %d", size);
memcpy(str + (size - BUFSIZ), buf, BUFSIZ);
} else {
size = BUFSIZ;
str = malloc_or_die(size);
memcpy(str, buf, size);
}
}
/* move the file descriptor to the end of the string */
r = lseek(input_fd, -(r - (i+1)), SEEK_CUR);
if (r < 0)
die("lseek");
if (str) {
size += i;
str = realloc(str, size);
if (!str)
die("malloc of size %d", size);
memcpy(str + (size - i), buf, i);
} else {
size = i;
str = malloc_or_die(i);
memcpy(str, buf, i);
}
return str;
}
static void read_proc_kallsyms(void)
{
unsigned int size;
char *buf;
size = read4();
if (!size)
return;
buf = malloc_or_die(size);
read_or_die(buf, size);
parse_proc_kallsyms(buf, size);
free(buf);
}
static void read_ftrace_printk(void)
{
unsigned int size;
char *buf;
size = read4();
if (!size)
return;
buf = malloc_or_die(size);
read_or_die(buf, size);
parse_ftrace_printk(buf, size);
free(buf);
}
static void read_header_files(void)
{
unsigned long long size;
char *header_page;
char *header_event;
char buf[BUFSIZ];
read_or_die(buf, 12);
if (memcmp(buf, "header_page", 12) != 0)
die("did not read header page");
size = read8();
header_page = malloc_or_die(size);
read_or_die(header_page, size);
parse_header_page(header_page, size);
free(header_page);
/*
* The size field in the page is of type long,
* use that instead, since it represents the kernel.
*/
long_size = header_page_size_size;
read_or_die(buf, 13);
if (memcmp(buf, "header_event", 13) != 0)
die("did not read header event");
size = read8();
header_event = malloc_or_die(size);
read_or_die(header_event, size);
free(header_event);
}
static void read_ftrace_file(unsigned long long size)
{
char *buf;
buf = malloc_or_die(size);
read_or_die(buf, size);
parse_ftrace_file(buf, size);
free(buf);
}
static void read_event_file(char *sys, unsigned long long size)
{
char *buf;
buf = malloc_or_die(size);
read_or_die(buf, size);
parse_event_file(buf, size, sys);
free(buf);
}
static void read_ftrace_files(void)
{
unsigned long long size;
int count;
int i;
count = read4();
for (i = 0; i < count; i++) {
size = read8();
read_ftrace_file(size);
}
}
static void read_event_files(void)
{
unsigned long long size;
char *sys;
int systems;
int count;
int i,x;
systems = read4();
for (i = 0; i < systems; i++) {
sys = read_string();
count = read4();
for (x=0; x < count; x++) {
size = read8();
read_event_file(sys, size);
}
}
}
struct cpu_data {
unsigned long long offset;
unsigned long long size;
unsigned long long timestamp;
struct record *next;
char *page;
int cpu;
int index;
int page_size;
};
static struct cpu_data *cpu_data;
static void update_cpu_data_index(int cpu)
{
cpu_data[cpu].offset += page_size;
cpu_data[cpu].size -= page_size;
cpu_data[cpu].index = 0;
}
static void get_next_page(int cpu)
{
off64_t save_seek;
off64_t ret;
if (!cpu_data[cpu].page)
return;
if (read_page) {
if (cpu_data[cpu].size <= page_size) {
free(cpu_data[cpu].page);
cpu_data[cpu].page = NULL;
return;
}
update_cpu_data_index(cpu);
/* other parts of the code may expect the pointer to not move */
save_seek = lseek64(input_fd, 0, SEEK_CUR);
ret = lseek64(input_fd, cpu_data[cpu].offset, SEEK_SET);
if (ret < 0)
die("failed to lseek");
ret = read(input_fd, cpu_data[cpu].page, page_size);
if (ret < 0)
die("failed to read page");
/* reset the file pointer back */
lseek64(input_fd, save_seek, SEEK_SET);
return;
}
munmap(cpu_data[cpu].page, page_size);
cpu_data[cpu].page = NULL;
if (cpu_data[cpu].size <= page_size)
return;
update_cpu_data_index(cpu);
cpu_data[cpu].page = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE,
input_fd, cpu_data[cpu].offset);
if (cpu_data[cpu].page == MAP_FAILED)
die("failed to mmap cpu %d at offset 0x%llx",
cpu, cpu_data[cpu].offset);
}
static unsigned int type_len4host(unsigned int type_len_ts)
{
if (file_bigendian)
return (type_len_ts >> 27) & ((1 << 5) - 1);
else
return type_len_ts & ((1 << 5) - 1);
}
static unsigned int ts4host(unsigned int type_len_ts)
{
if (file_bigendian)
return type_len_ts & ((1 << 27) - 1);
else
return type_len_ts >> 5;
}
static int calc_index(void *ptr, int cpu)
{
return (unsigned long)ptr - (unsigned long)cpu_data[cpu].page;
}
struct record *trace_peek_data(int cpu)
{
struct record *data;
void *page = cpu_data[cpu].page;
int idx = cpu_data[cpu].index;
void *ptr = page + idx;
unsigned long long extend;
unsigned int type_len_ts;
unsigned int type_len;
unsigned int delta;
unsigned int length = 0;
if (cpu_data[cpu].next)
return cpu_data[cpu].next;
if (!page)
return NULL;
if (!idx) {
/* FIXME: handle header page */
if (header_page_ts_size != 8)
die("expected a long long type for timestamp");
cpu_data[cpu].timestamp = data2host8(ptr);
ptr += 8;
switch (header_page_size_size) {
case 4:
cpu_data[cpu].page_size = data2host4(ptr);
ptr += 4;
break;
case 8:
cpu_data[cpu].page_size = data2host8(ptr);
ptr += 8;
break;
default:
die("bad long size");
}
ptr = cpu_data[cpu].page + header_page_data_offset;
}
read_again:
idx = calc_index(ptr, cpu);
if (idx >= cpu_data[cpu].page_size) {
get_next_page(cpu);
return trace_peek_data(cpu);
}
type_len_ts = data2host4(ptr);
ptr += 4;
type_len = type_len4host(type_len_ts);
delta = ts4host(type_len_ts);
switch (type_len) {
case RINGBUF_TYPE_PADDING:
if (!delta)
die("error, hit unexpected end of page");
length = data2host4(ptr);
ptr += 4;
length *= 4;
ptr += length;
goto read_again;
case RINGBUF_TYPE_TIME_EXTEND:
extend = data2host4(ptr);
ptr += 4;
extend <<= TS_SHIFT;
extend += delta;
cpu_data[cpu].timestamp += extend;
goto read_again;
case RINGBUF_TYPE_TIME_STAMP:
ptr += 12;
break;
case 0:
length = data2host4(ptr);
ptr += 4;
die("here! length=%d", length);
break;
default:
length = type_len * 4;
break;
}
cpu_data[cpu].timestamp += delta;
data = malloc_or_die(sizeof(*data));
memset(data, 0, sizeof(*data));
data->ts = cpu_data[cpu].timestamp;
data->size = length;
data->data = ptr;
ptr += length;
cpu_data[cpu].index = calc_index(ptr, cpu);
cpu_data[cpu].next = data;
return data;
}
struct record *trace_read_data(int cpu)
{
struct record *data;
data = trace_peek_data(cpu);
cpu_data[cpu].next = NULL;
return data;
}
void trace_report (void)
{
const char *input_file = "trace.info";
char buf[BUFSIZ];
char test[] = { 23, 8, 68 };
char *version;
int show_funcs = 0;
int show_printk = 0;
input_fd = open(input_file, O_RDONLY);
if (input_fd < 0)
die("opening '%s'\n", input_file);
read_or_die(buf, 3);
if (memcmp(buf, test, 3) != 0)
die("not an trace data file");
read_or_die(buf, 7);
if (memcmp(buf, "tracing", 7) != 0)
die("not a trace file (missing tracing)");
version = read_string();
printf("version = %s\n", version);
free(version);
read_or_die(buf, 1);
file_bigendian = buf[0];
host_bigendian = bigendian();
read_or_die(buf, 1);
long_size = buf[0];
page_size = read4();
read_header_files();
read_ftrace_files();
read_event_files();
read_proc_kallsyms();
read_ftrace_printk();
if (show_funcs) {
print_funcs();
return;
}
if (show_printk) {
print_printk();
return;
}
return;
}

239
tools/perf/util/trace-event.h Normal file
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@ -0,0 +1,239 @@
#ifndef _TRACE_EVENTS_H
#define _TRACE_EVENTS_H
#include "parse-events.h"
#define __unused __attribute__((unused))
#ifndef PAGE_MASK
#define PAGE_MASK (page_size - 1)
#endif
enum {
RINGBUF_TYPE_PADDING = 29,
RINGBUF_TYPE_TIME_EXTEND = 30,
RINGBUF_TYPE_TIME_STAMP = 31,
};
#ifndef TS_SHIFT
#define TS_SHIFT 27
#endif
#define NSECS_PER_SEC 1000000000ULL
#define NSECS_PER_USEC 1000ULL
enum format_flags {
FIELD_IS_ARRAY = 1,
FIELD_IS_POINTER = 2,
};
struct format_field {
struct format_field *next;
char *type;
char *name;
int offset;
int size;
unsigned long flags;
};
struct format {
int nr_common;
int nr_fields;
struct format_field *common_fields;
struct format_field *fields;
};
struct print_arg_atom {
char *atom;
};
struct print_arg_string {
char *string;
};
struct print_arg_field {
char *name;
struct format_field *field;
};
struct print_flag_sym {
struct print_flag_sym *next;
char *value;
char *str;
};
struct print_arg_typecast {
char *type;
struct print_arg *item;
};
struct print_arg_flags {
struct print_arg *field;
char *delim;
struct print_flag_sym *flags;
};
struct print_arg_symbol {
struct print_arg *field;
struct print_flag_sym *symbols;
};
struct print_arg;
struct print_arg_op {
char *op;
int prio;
struct print_arg *left;
struct print_arg *right;
};
struct print_arg_func {
char *name;
struct print_arg *args;
};
enum print_arg_type {
PRINT_NULL,
PRINT_ATOM,
PRINT_FIELD,
PRINT_FLAGS,
PRINT_SYMBOL,
PRINT_TYPE,
PRINT_STRING,
PRINT_OP,
};
struct print_arg {
struct print_arg *next;
enum print_arg_type type;
union {
struct print_arg_atom atom;
struct print_arg_field field;
struct print_arg_typecast typecast;
struct print_arg_flags flags;
struct print_arg_symbol symbol;
struct print_arg_func func;
struct print_arg_string string;
struct print_arg_op op;
};
};
struct print_fmt {
char *format;
struct print_arg *args;
};
struct event {
struct event *next;
char *name;
int id;
int flags;
struct format format;
struct print_fmt print_fmt;
};
enum {
EVENT_FL_ISFTRACE = 1,
EVENT_FL_ISPRINT = 2,
EVENT_FL_ISBPRINT = 4,
EVENT_FL_ISFUNC = 8,
EVENT_FL_ISFUNCENT = 16,
EVENT_FL_ISFUNCRET = 32,
};
struct record {
unsigned long long ts;
int size;
void *data;
};
struct record *trace_peek_data(int cpu);
struct record *trace_read_data(int cpu);
void parse_set_info(int nr_cpus, int long_sz);
void trace_report(void);
void *malloc_or_die(unsigned int size);
void parse_cmdlines(char *file, int size);
void parse_proc_kallsyms(char *file, unsigned int size);
void parse_ftrace_printk(char *file, unsigned int size);
void print_funcs(void);
void print_printk(void);
int parse_ftrace_file(char *buf, unsigned long size);
int parse_event_file(char *buf, unsigned long size, char *system);
void print_event(int cpu, void *data, int size, unsigned long long nsecs,
char *comm);
extern int file_bigendian;
extern int host_bigendian;
int bigendian(void);
static inline unsigned short __data2host2(unsigned short data)
{
unsigned short swap;
if (host_bigendian == file_bigendian)
return data;
swap = ((data & 0xffULL) << 8) |
((data & (0xffULL << 8)) >> 8);
return swap;
}
static inline unsigned int __data2host4(unsigned int data)
{
unsigned int swap;
if (host_bigendian == file_bigendian)
return data;
swap = ((data & 0xffULL) << 24) |
((data & (0xffULL << 8)) << 8) |
((data & (0xffULL << 16)) >> 8) |
((data & (0xffULL << 24)) >> 24);
return swap;
}
static inline unsigned long long __data2host8(unsigned long long data)
{
unsigned long long swap;
if (host_bigendian == file_bigendian)
return data;
swap = ((data & 0xffULL) << 56) |
((data & (0xffULL << 8)) << 40) |
((data & (0xffULL << 16)) << 24) |
((data & (0xffULL << 24)) << 8) |
((data & (0xffULL << 32)) >> 8) |
((data & (0xffULL << 40)) >> 24) |
((data & (0xffULL << 48)) >> 40) |
((data & (0xffULL << 56)) >> 56);
return swap;
}
#define data2host2(ptr) __data2host2(*(unsigned short *)ptr)
#define data2host4(ptr) __data2host4(*(unsigned int *)ptr)
#define data2host8(ptr) __data2host8(*(unsigned long long *)ptr)
extern int header_page_ts_offset;
extern int header_page_ts_size;
extern int header_page_size_offset;
extern int header_page_size_size;
extern int header_page_data_offset;
extern int header_page_data_size;
int parse_header_page(char *buf, unsigned long size);
void read_tracing_data(struct perf_counter_attr *pattrs, int nb_counters);
#endif /* _TRACE_EVENTS_H */

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

@ -307,6 +307,7 @@ 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