[PATCH v19 18/19] perf, tools, pmu-events: Fix fixed counters on Intel

From: Sukadev Bhattiprolu
Date: Mon Nov 30 2015 - 21:58:53 EST


From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

The JSON event lists use a different encoding for fixed counters
than perf for instructions and cycles (ref-cycles is ok)

This lead to some common events like inst_retired.any
or cpu_clk_unhalted.thread not counting, when specified with their
JSON name.

Special case these events in the jevents conversion process.
I prefer to not touch the JSON files for this, as it's intended
that standard JSON files can be just dropped into the perf
build without changes.

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
[Fix minor compile error]
---
tools/perf/pmu-events/jevents.c | 27 +++++++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index b4e3f01..5a28baf 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -237,6 +237,29 @@ static void print_events_table_suffix(FILE *outfp)
fprintf(outfp, "};\n");
}

+static struct fixed {
+ const char *name;
+ const char *event;
+} fixed[] = {
+ { "inst_retired.any", "event=0xc0" },
+ { "cpu_clk_unhalted.thread", "event=0x3c" },
+ { "cpu_clk_unhalted.thread_any", "event=0x3c,any=1" },
+ { NULL, NULL},
+};
+
+/*
+ * Handle different fixed counter encodings between JSON and perf.
+ */
+static char *real_event(const char *name, char *event)
+{
+ int i;
+
+ for (i = 0; fixed[i].name; i++)
+ if (!strcasecmp(name, fixed[i].name))
+ return (char *)fixed[i].event;
+ return event;
+}
+
/* Call func with each event in the json file */
int json_events(const char *fn,
int (*func)(void *data, char *name, char *event, char *desc,
@@ -325,8 +348,8 @@ int json_events(const char *fn,
if (msr != NULL)
addfield(map, &event, ",", msr->pname, msrval);
fixname(name);
-
- err = func(data, name, event, desc, long_desc, topic);
+ err = func(data, name, real_event(name, event), desc,
+ long_desc, topic);
free(event);
free(desc);
free(name);
--
1.8.3.1

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