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Commit 50e200f0 authored by Andi Kleen's avatar Andi Kleen Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Default to cpu// for events v5 



When an event fails to parse and it's not in a new style format,
try to parse it again as a cpu event.

This allows to use sysfs exported events directly without //, so you can use

perf record -e mem-loads ...

instead of

perf record -e cpu/mem-loads/

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1366480949-32292-1-git-send-email-andi@firstfloor.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 38051234

tools/perf/util/include/linux/string.h

+1 −0
Original line number Diff line number Diff line 
#include <string.h>



void *memdup(const void *src, size_t len);

int str_append(char **s, int *len, const char *a);

tools/perf/util/parse-events.c

+29 −1
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ 
#include "parse-options.h"

#include "parse-events.h"

#include "exec_cmd.h"

#include "string.h"

#include "linux/string.h"

#include "symbol.h"

#include "cache.h"

#include "header.h"
@@ -823,6 +823,32 @@ int parse_events_name(struct list_head *list, char *name) 
	return 0;

}



static int parse_events__scanner(const char *str, void *data, int start_token);



static int parse_events_fixup(int ret, const char *str, void *data,

			      int start_token)

{

	char *o = strdup(str);

	char *s = NULL;

	char *t = o;

	char *p;

	int len = 0;



	if (!o)

		return ret;

	while ((p = strsep(&t, ",")) != NULL) {

		if (s)

			str_append(&s, &len, ",");

		str_append(&s, &len, "cpu/");

		str_append(&s, &len, p);

		str_append(&s, &len, "/");

	}

	free(o);

	if (!s)

		return -ENOMEM;

	return parse_events__scanner(s, data, start_token);

}



static int parse_events__scanner(const char *str, void *data, int start_token)

{

	YY_BUFFER_STATE buffer;
@@ -843,6 +869,8 @@ static int parse_events__scanner(const char *str, void *data, int start_token) 
	parse_events__flush_buffer(buffer, scanner);

	parse_events__delete_buffer(buffer, scanner);

	parse_events_lex_destroy(scanner);

	if (ret && !strchr(str, '/'))

		ret = parse_events_fixup(ret, str, data, start_token);

	return ret;

}

tools/perf/util/string.c

+24 −0
Original line number Diff line number Diff line
@@ -387,3 +387,27 @@ void *memdup(const void *src, size_t len) 


	return p;

}



/**

 * str_append - reallocate string and append another

 * @s: pointer to string pointer

 * @len: pointer to len (initialized)

 * @a: string to append.

 */

int str_append(char **s, int *len, const char *a)

{

	int olen = *s ? strlen(*s) : 0;

	int nlen = olen + strlen(a) + 1;

	if (*len < nlen) {

		*len = *len * 2;

		if (*len < nlen)

			*len = nlen;

		*s = realloc(*s, *len);

		if (!*s)

			return -ENOMEM;

		if (olen == 0)

			**s = 0;

	}

	strcat(*s, a);

	return 0;

}