linux-kernel - [PATCH 2/3 v2] perf symbols: Update the list of kernel idle symbols

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Message-Id: <20200207230613.26709-2-kim.phillips@amd.com>
Date:   Fri,  7 Feb 2020 17:06:12 -0600
From:   Kim Phillips <kim.phillips@....com>
To:     Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:     Kim Phillips <kim.phillips@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 2/3 v2] perf symbols: Update the list of kernel idle symbols

"acpi_idle_do_entry", "acpi_processor_ffh_cstate_enter", and "idle_cpu"
appear in 'perf top' output, at least on AMD systems.

Add them to perf's idle_symbols list, so they don't dominate 'perf top'
output.

Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Cong Wang <xiyou.wangcong@...il.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Jin Yao <yao.jin@...ux.intel.com>
Cc: Kan Liang <kan.liang@...ux.intel.com>
Cc: Kim Phillips <kim.phillips@....com>
Cc: Song Liu <songliubraving@...com>
Cc: Davidlohr Bueso <dave@...olabs.net>
Cc: linux-perf-users@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Acked-by: Jiri Olsa <jolsa@...hat.com>
Signed-off-by: Kim Phillips <kim.phillips@....com>
---
v2: Added Jiri Olsa's acked-by:

https://lore.kernel.org/lkml/20200120092844.GC608405@krava/

 tools/perf/util/symbol.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 3b379b1296f1..f3120c4f47ad 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -635,9 +635,12 @@ int modules__parse(const char *filename, void *arg,
 static bool symbol__is_idle(const char *name)
 {
 	const char * const idle_symbols[] = {
+		"acpi_idle_do_entry",
+		"acpi_processor_ffh_cstate_enter",
 		"arch_cpu_idle",
 		"cpu_idle",
 		"cpu_startup_entry",
+		"idle_cpu",
 		"intel_idle",
 		"default_idle",
 		"native_safe_halt",
-- 
2.25.0