linux-kernel - [PATCH] perf, tools, pmu-events: Fix fixed counters on Intel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1441391602-11580-1-git-send-email-andi@firstfloor.org>
Date:	Fri,  4 Sep 2015 11:33:22 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	sukadev@...ux.vnet.ibm.com
Cc:	acme@...nel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH] perf, tools, pmu-events: Fix fixed counters on Intel

From: Andi Kleen <ak@...ux.intel.com>

[This patch is on top of Sukadev's json patchkit]

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@...ux.intel.com>
---
 tools/perf/pmu-events/jevents.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 7347cca..f4e5903 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -237,6 +237,28 @@ 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" },
+	{},
+};
+
+/*
+ * 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,
@@ -324,8 +346,7 @@ 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);
-- 
2.4.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/