Adding support to parse non architectural event aliases
for given cpu. These aliases will be provided as 'events'
directory like architectural ones provided by kernel.
Signed-off-by: Jiri Olsa <jo...@redhat.com>
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Corey Ashford <cjash...@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Ingo Molnar <mi...@elte.hu>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
---
tools/perf/arch/x86/Makefile | 7 +++
tools/perf/arch/x86/util/pmu.c | 98 ++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/pmu.c | 18 +++++---
tools/perf/util/pmu.h | 4 ++
4 files changed, 121 insertions(+), 6 deletions(-)
create mode 100644 tools/perf/arch/x86/util/pmu.c
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
index 815841c..c175f65 100644
--- a/tools/perf/arch/x86/Makefile
+++ b/tools/perf/arch/x86/Makefile
@@ -6,3 +6,10 @@ ifndef NO_LIBUNWIND
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
endif
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/pmu.o
+
+$(OUTPUT)$(OUTPUT)arch/$(ARCH)/util/pmu.o: $(OUTPUT)arch/$(ARCH)/util/pmu.c
$(OUTPUT)PERF-CFLAGS
+ $(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) \
+ '-DPERF_EXEC_PATH="$(perfexecdir_SQ)"' \
+ '-DPREFIX="$(prefix_SQ)"' \
+ $<
diff --git a/tools/perf/arch/x86/util/pmu.c b/tools/perf/arch/x86/util/pmu.c
new file mode 100644
index 0000000..0938c70
--- /dev/null
+++ b/tools/perf/arch/x86/util/pmu.c
@@ -0,0 +1,98 @@
+
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include "pmu.h"
+#include "util.h"
+#include "sysfs.h"
+
+static int intel_aliases(struct list_head *head, unsigned model)
+{
+ struct stat st;
+ char path[PATH_MAX];
+ const char *model_str;
+
+ switch (model) {
+ case 42:
+ model_str = "SandyBridge";
+ break;
+ default:
+ /* unknown model.. plenty to cover ;-) */
+ return 0;
+ }
+
+ /* try local one first */
+ scnprintf(path, PATH_MAX, "./arch/x86/events/intel/%s/", model_str);
+
+ if (stat(path, &st) < 0) {
+ scnprintf(path, PATH_MAX, "%s/%s/events/x86/intel/%s/",
+ PREFIX, PERF_EXEC_PATH, model_str);
+
+ if (stat(path, &st) < 0)
+ return -1;
+ }
+
+ if (pmu_aliases_parse(path, head))
+ return -1;
+
+ return 0;
+}
+
+static int cpu_specs(unsigned *vendor, unsigned *model)
+{
+ FILE *file;
+ struct stat st;
+ char path[PATH_MAX];
+ int ret = 0;
+
+ scnprintf(path, PATH_MAX, "%s/devices/system/cpu/modalias",
+ sysfs_find_mountpoint());
+
+ if (stat(path, &st) < 0)
+ return -ENOENT;
+
+ file = fopen(path, "r");
+ if (!file)
+ return -errno;
+
+ if (2 != fscanf(file, "x86cpu:vendor:%X:family:%*X:model:%X:",
+ vendor, model))
+ ret = -1;
+
+ fclose(file);
+ return ret;
+}
+
+static int cpu_aliases(struct list_head *head)
+{
+ unsigned vendol, model;
+ int ret;
+
+ ret = cpu_specs(&vendol, &model);
+ if (ret) {
+ pr_info("failed to get cpu aliases");
+ return 0;
+ }
+
+ switch (vendol) {
+ /* Intel */
+ case 0:
+ return intel_aliases(head, model);
+ default:
+ /* unknown vendor.. plenty to cover ;-) */
+ return 0;
+ }
+
+ return 0;
+}
+
+int arch_pmu_aliases(char *name, struct list_head *head)
+{
+ if (!strcmp(name, "cpu"))
+ return cpu_aliases(head);
+
+ return 0;
+}
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 9bdc60c..626d9d7 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -114,7 +114,7 @@ static int perf_pmu__new_alias(struct list_head *list, char
*name, FILE *file)
* Process all the sysfs attributes located under the directory
* specified in 'dir' parameter.
*/
-static int pmu_aliases_parse(char *dir, struct list_head *head)
+int pmu_aliases_parse(char *dir, struct list_head *head)
{
struct dirent *evt_ent;
DIR *event_dir;
@@ -146,6 +146,13 @@ static int pmu_aliases_parse(char *dir, struct list_head
*head)
return ret;
}
+__attribute__((weak))
+int arch_pmu_aliases(char *name __maybe_unused,
+ struct list_head *head __maybe_unused)
+{
+ return 0;
+}
+
/*
* Reading the pmu event aliases definition, which should be located at:
* /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
@@ -163,13 +170,12 @@ static int pmu_aliases(char *name, struct list_head *head)
snprintf(path, PATH_MAX,
"%s/bus/event_source/devices/%s/events", sysfs, name);
- if (stat(path, &st) < 0)
- return 0; /* no error if 'events' does not exist */
-
- if (pmu_aliases_parse(path, head))
+ /* no error if 'events' does not exist */
+ if (!stat(path, &st) &&
+ pmu_aliases_parse(path, head))
return -1;
- return 0;
+ return arch_pmu_aliases(name, head);
}
static int pmu_alias_terms(struct perf_pmu__alias *alias,
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index a313ed7..62da834 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -53,5 +53,9 @@ int perf_pmu__format_parse(char *dir, struct list_head *head);
struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);
+int pmu_aliases_parse(char *dir, struct list_head *head);
+
+int arch_pmu_aliases(char *name, struct list_head *head);
+
int perf_pmu__test(void);
#endif /* __PMU_H */
--
1.7.11.7
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