linux-kernel - [PATCH 1/1] perf symbols: Add 'intel_idle

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Message-ID: <ZR66Qgbcltt+zG7F@kernel.org>
Date:   Thu, 5 Oct 2023 10:29:38 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ian Rogers <irogers@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: [PATCH 1/1] perf symbols: Add 'intel_idle_ibrs' to the list of idle
 symbols

From: Arnaldo Carvalho de Melo <acme@...hat.com>

This is a longstanding to do list entry: we need a way to see that a
sample took place while in idle state, as the current way to do it is
to infer that by the name of the functions that in such state have
more samples, IOW: a hack.

Maybe we can do flip a bit in samples that take place inside the
enter/exit idle section in do_idle()?

But till then, add one more :-\

Cc: Adrian Hunter <adrian.hunter@...el.com>
cc: Frédéric Weisbecker <fweisbec@...il.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Ingo Molnar <mingo@...nel.org>,
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/symbol.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 5b54d2639df4740e..3c7f483bf85bbdaf 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -718,6 +718,7 @@ static bool symbol__is_idle(const char *name)
 		"cpu_startup_entry",
 		"idle_cpu",
 		"intel_idle",
+		"intel_idle_ibrs",
 		"default_idle",
 		"native_safe_halt",
 		"enter_idle",
-- 
2.41.0