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: Matt Fleming <matt.fleming@intel.com> Acked-by: Jiri 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: Arnaldo Carvalho de Melo <acme@redhat.com>
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07394b5f13
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@ -634,10 +634,9 @@ int parse_events_add_pmu(struct list_head *list, int *idx,
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char *name, struct list_head *head_config)
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char *name, struct list_head *head_config)
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{
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{
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struct perf_event_attr attr;
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struct perf_event_attr attr;
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struct perf_pmu_info info;
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struct perf_pmu *pmu;
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struct perf_pmu *pmu;
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struct perf_evsel *evsel;
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struct perf_evsel *evsel;
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const char *unit;
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double scale;
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pmu = perf_pmu__find(name);
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pmu = perf_pmu__find(name);
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if (!pmu)
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if (!pmu)
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@ -656,7 +655,7 @@ int parse_events_add_pmu(struct list_head *list, int *idx,
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return evsel ? 0 : -ENOMEM;
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return evsel ? 0 : -ENOMEM;
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}
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}
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if (perf_pmu__check_alias(pmu, head_config, &unit, &scale))
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if (perf_pmu__check_alias(pmu, head_config, &info))
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return -EINVAL;
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return -EINVAL;
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/*
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/*
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@ -671,8 +670,8 @@ int parse_events_add_pmu(struct list_head *list, int *idx,
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evsel = __add_event(list, idx, &attr, pmu_event_name(head_config),
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evsel = __add_event(list, idx, &attr, pmu_event_name(head_config),
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pmu->cpus);
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pmu->cpus);
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if (evsel) {
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if (evsel) {
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evsel->unit = unit;
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evsel->unit = info.unit;
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evsel->scale = scale;
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evsel->scale = info.scale;
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}
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}
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return evsel ? 0 : -ENOMEM;
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return evsel ? 0 : -ENOMEM;
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@ -210,6 +210,19 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI
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return 0;
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return 0;
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}
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}
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static inline bool pmu_alias_info_file(char *name)
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{
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size_t len;
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len = strlen(name);
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if (len > 5 && !strcmp(name + len - 5, ".unit"))
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return true;
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if (len > 6 && !strcmp(name + len - 6, ".scale"))
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return true;
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return false;
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}
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/*
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/*
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* Process all the sysfs attributes located under the directory
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* Process all the sysfs attributes located under the directory
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* specified in 'dir' parameter.
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* specified in 'dir' parameter.
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@ -218,7 +231,6 @@ static int pmu_aliases_parse(char *dir, struct list_head *head)
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{
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{
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struct dirent *evt_ent;
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struct dirent *evt_ent;
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DIR *event_dir;
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DIR *event_dir;
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size_t len;
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int ret = 0;
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int ret = 0;
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event_dir = opendir(dir);
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event_dir = opendir(dir);
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@ -234,13 +246,9 @@ static int pmu_aliases_parse(char *dir, struct list_head *head)
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continue;
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continue;
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/*
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/*
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* skip .unit and .scale info files
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* skip info files parsed in perf_pmu__new_alias()
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* parsed in perf_pmu__new_alias()
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*/
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*/
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len = strlen(name);
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if (pmu_alias_info_file(name))
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if (len > 5 && !strcmp(name + len - 5, ".unit"))
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continue;
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if (len > 6 && !strcmp(name + len - 6, ".scale"))
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continue;
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continue;
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snprintf(path, PATH_MAX, "%s/%s", dir, name);
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snprintf(path, PATH_MAX, "%s/%s", dir, name);
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@ -645,7 +653,7 @@ static int check_unit_scale(struct perf_pmu_alias *alias,
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* defined for the alias
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* defined for the alias
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*/
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*/
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int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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const char **unit, double *scale)
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struct perf_pmu_info *info)
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{
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{
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struct parse_events_term *term, *h;
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struct parse_events_term *term, *h;
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struct perf_pmu_alias *alias;
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struct perf_pmu_alias *alias;
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@ -655,8 +663,8 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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* Mark unit and scale as not set
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* Mark unit and scale as not set
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* (different from default values, see below)
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* (different from default values, see below)
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*/
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*/
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*unit = NULL;
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info->unit = NULL;
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*scale = 0.0;
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info->scale = 0.0;
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list_for_each_entry_safe(term, h, head_terms, list) {
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list_for_each_entry_safe(term, h, head_terms, list) {
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alias = pmu_find_alias(pmu, term);
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alias = pmu_find_alias(pmu, term);
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@ -666,7 +674,7 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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if (ret)
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if (ret)
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return ret;
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return ret;
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ret = check_unit_scale(alias, unit, scale);
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ret = check_unit_scale(alias, &info->unit, &info->scale);
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if (ret)
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if (ret)
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return ret;
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return ret;
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@ -679,11 +687,11 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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* set defaults as for evsel
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* set defaults as for evsel
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* unit cannot left to NULL
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* unit cannot left to NULL
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*/
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*/
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if (*unit == NULL)
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if (info->unit == NULL)
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*unit = "";
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info->unit = "";
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if (*scale == 0.0)
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if (info->scale == 0.0)
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*scale = 1.0;
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info->scale = 1.0;
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return 0;
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return 0;
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}
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}
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@ -25,6 +25,11 @@ struct perf_pmu {
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struct list_head list; /* ELEM */
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struct list_head list; /* ELEM */
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};
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};
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struct perf_pmu_info {
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const char *unit;
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double scale;
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};
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struct perf_pmu *perf_pmu__find(const char *name);
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struct perf_pmu *perf_pmu__find(const char *name);
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int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
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int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
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struct list_head *head_terms);
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struct list_head *head_terms);
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@ -33,7 +38,7 @@ int perf_pmu__config_terms(struct list_head *formats,
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struct list_head *head_terms,
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struct list_head *head_terms,
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bool zero);
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bool zero);
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int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
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const char **unit, double *scale);
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struct perf_pmu_info *info);
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struct list_head *perf_pmu__alias(struct perf_pmu *pmu,
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struct list_head *perf_pmu__alias(struct perf_pmu *pmu,
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struct list_head *head_terms);
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struct list_head *head_terms);
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int perf_pmu_wrap(void);
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int perf_pmu_wrap(void);
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