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perf tools: Only save the event formats we need

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While opening a trace event counter, every events are saved in
the trace.info file. But we only want to save the
specifications of the events we are using.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1251421798-9101-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker
2009-08-28 03:09:58 +02:00
committed by Ingo Molnar
parent 1909629fb1
commit 1ef2ed1066
7 changed files with 120 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

72
tools/perf/util/trace-event-info.c
View File

@@ -32,7 +32,9 @@
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <stdbool.h>
#include "../perf.h"
#include "trace-event.h"
@@ -289,7 +291,18 @@ static void read_header_files(void)
put_tracing_file(path);
}
static void copy_event_system(const char *sys)
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;
@@ -305,7 +318,8 @@ static void copy_event_system(const char *sys)
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
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);
@@ -321,7 +335,8 @@ static void copy_event_system(const char *sys)
rewinddir(dir);
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
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);
@@ -340,18 +355,29 @@ static void copy_event_system(const char *sys)
}
}
static void read_ftrace_files(void)
static void read_ftrace_files(struct tracepoint_path *tps)
{
char *path;
path = get_tracing_file("events/ftrace");
copy_event_system(path);
copy_event_system(path, tps);
put_tracing_file(path);
}
static void read_event_files(void)
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;
@@ -370,7 +396,8 @@ static void read_event_files(void)
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
strcmp(dent->d_name, "ftrace") == 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);
@@ -388,7 +415,8 @@ static void read_event_files(void)
while ((dent = readdir(dir))) {
if (strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
strcmp(dent->d_name, "ftrace") == 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);
@@ -396,7 +424,7 @@ static void read_event_files(void)
if (ret >= 0) {
if (S_ISDIR(st.st_mode)) {
write_or_die(dent->d_name, strlen(dent->d_name) + 1);
copy_event_system(sys);
copy_event_system(sys, tps);
}
}
free(sys);
@@ -450,9 +478,27 @@ static void read_ftrace_printk(void)
}
void read_tracing_data(void)
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)
@@ -483,9 +529,11 @@ void read_tracing_data(void)
page_size = getpagesize();
write_or_die(&page_size, 4);
tps = get_tracepoints_path(pattrs, nb_counters);
read_header_files();
read_ftrace_files();
read_event_files();
read_ftrace_files(tps);
read_event_files(tps);
read_proc_kallsyms();
read_ftrace_printk();
}