linux-kernel - [PATCH] perf pmu-events: Fix the missing "cpu_clk

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Date:   Mon, 29 Jul 2019 15:27:55 +0800
From:   Jin Yao <yao.jin@...ux.intel.com>
To:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc:     Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com,
        Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH] perf pmu-events: Fix the missing "cpu_clk_unhalted.core"

The events defined in pmu-events JSON are parsed and added into
perf tool. For fixed counters, we handle the encodings between
JSON and perf by using a static array fixed[].

But the fixed[] has missed an important event "cpu_clk_unhalted.core".

For example, on tremont platform,

[root@...alhost ~]# perf stat -e cpu_clk_unhalted.core -a
event syntax error: 'cpu_clk_unhalted.core'
                     \___ parser error

With this patch, the event cpu_clk_unhalted.core can be parsed.

[root@...alhost perf]# ./perf stat -e cpu_clk_unhalted.core -a -vvv
------------------------------------------------------------
perf_event_attr:
  type                             4
  size                             112
  config                           0x3c
  sample_type                      IDENTIFIER
  read_format                      TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
  disabled                         1
  inherit                          1
  exclude_guest                    1
------------------------------------------------------------
...

Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
 tools/perf/pmu-events/jevents.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 1a91a197cafb..d413761621b0 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -453,6 +453,7 @@ static struct fixed {
 	{ "inst_retired.any_p", "event=0xc0" },
 	{ "cpu_clk_unhalted.ref", "event=0x0,umask=0x03" },
 	{ "cpu_clk_unhalted.thread", "event=0x3c" },
+	{ "cpu_clk_unhalted.core", "event=0x3c" },
 	{ "cpu_clk_unhalted.thread_any", "event=0x3c,any=1" },
 	{ NULL, NULL},
 };
-- 
2.17.1