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Commit 46441bdc authored by Matt Fleming's avatar Matt Fleming Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Refactor unit and scale function parameters 



Passing pointers to alias modifiers 'unit' and 'scale' isn't very
future-proof since if we add more modifiers to the list we'll end up
passing more arguments.

Instead wrap everything up in a struct perf_pmu_info, which can easily
be expanded when additional alias modifiers are necessary in the future.

Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1411567455-31264-3-git-send-email-matt@console-pimps.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 07394b5f

tools/perf/util/parse-events.c

+4 −5
Original line number Diff line number Diff line
@@ -634,10 +634,9 @@ int parse_events_add_pmu(struct list_head *list, int *idx, 
			 char *name, struct list_head *head_config)

{

	struct perf_event_attr attr;

	struct perf_pmu_info info;

	struct perf_pmu *pmu;

	struct perf_evsel *evsel;

	const char *unit;

	double scale;



	pmu = perf_pmu__find(name);

	if (!pmu)
@@ -656,7 +655,7 @@ int parse_events_add_pmu(struct list_head *list, int *idx, 
		return evsel ? 0 : -ENOMEM;

	}



	if (perf_pmu__check_alias(pmu, head_config, &unit, &scale))

	if (perf_pmu__check_alias(pmu, head_config, &info))

		return -EINVAL;



	/*
@@ -671,8 +670,8 @@ int parse_events_add_pmu(struct list_head *list, int *idx, 
	evsel = __add_event(list, idx, &attr, pmu_event_name(head_config),

			    pmu->cpus);

	if (evsel) {

		evsel->unit = unit;

		evsel->scale = scale;

		evsel->unit = info.unit;

		evsel->scale = info.scale;

	}



	return evsel ? 0 : -ENOMEM;

tools/perf/util/pmu.c

+23 −15
Original line number Diff line number Diff line
@@ -210,6 +210,19 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI 
	return 0;

}



static inline bool pmu_alias_info_file(char *name)

{

	size_t len;



	len = strlen(name);

	if (len > 5 && !strcmp(name + len - 5, ".unit"))

		return true;

	if (len > 6 && !strcmp(name + len - 6, ".scale"))

		return true;



	return false;

}



/*

 * Process all the sysfs attributes located under the directory

 * specified in 'dir' parameter.
@@ -218,7 +231,6 @@ static int pmu_aliases_parse(char *dir, struct list_head *head) 
{

	struct dirent *evt_ent;

	DIR *event_dir;

	size_t len;

	int ret = 0;



	event_dir = opendir(dir);
@@ -234,13 +246,9 @@ static int pmu_aliases_parse(char *dir, struct list_head *head) 
			continue;



		/*

		 * skip .unit and .scale info files

		 * parsed in perf_pmu__new_alias()

		 * skip info files parsed in perf_pmu__new_alias()

		 */

		len = strlen(name);

		if (len > 5 && !strcmp(name + len - 5, ".unit"))

			continue;

		if (len > 6 && !strcmp(name + len - 6, ".scale"))

		if (pmu_alias_info_file(name))

			continue;



		snprintf(path, PATH_MAX, "%s/%s", dir, name);
@@ -645,7 +653,7 @@ static int check_unit_scale(struct perf_pmu_alias *alias, 
 * defined for the alias

 */

int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,

			  const char **unit, double *scale)

			  struct perf_pmu_info *info)

{

	struct parse_events_term *term, *h;

	struct perf_pmu_alias *alias;
@@ -655,8 +663,8 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, 
	 * Mark unit and scale as not set

	 * (different from default values, see below)

	 */

	*unit   = NULL;

	*scale  = 0.0;

	info->unit   = NULL;

	info->scale  = 0.0;



	list_for_each_entry_safe(term, h, head_terms, list) {

		alias = pmu_find_alias(pmu, term);
@@ -666,7 +674,7 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, 
		if (ret)

			return ret;



		ret = check_unit_scale(alias, unit, scale);

		ret = check_unit_scale(alias, &info->unit, &info->scale);

		if (ret)

			return ret;
@@ -679,11 +687,11 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, 
	 * set defaults as for evsel

	 * unit cannot left to NULL

	 */

	if (*unit == NULL)

		*unit   = "";

	if (info->unit == NULL)

		info->unit   = "";



	if (*scale == 0.0)

		*scale  = 1.0;

	if (info->scale == 0.0)

		info->scale  = 1.0;



	return 0;

}

tools/perf/util/pmu.h

+6 −1
Original line number Diff line number Diff line
@@ -25,6 +25,11 @@ struct perf_pmu { 
	struct list_head list;    /* ELEM */

};



struct perf_pmu_info {

	const char *unit;

	double scale;

};



struct perf_pmu *perf_pmu__find(const char *name);

int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,

		     struct list_head *head_terms);
@@ -33,7 +38,7 @@ int perf_pmu__config_terms(struct list_head *formats, 
			   struct list_head *head_terms,

			   bool zero);

int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,

			  const char **unit, double *scale);

			  struct perf_pmu_info *info);

struct list_head *perf_pmu__alias(struct perf_pmu *pmu,

				  struct list_head *head_terms);

int perf_pmu_wrap(void);