linux-kernel - [RFC] perf bench: Adjusting concerns around asynchronous-signal-safety?

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Message-ID: <39a3552f-cbaa-4e29-ac76-95684859787a@web.de>
Date: Mon, 22 Jul 2024 11:44:25 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: linux-perf-users@...r.kernel.org, kernel-janitors@...r.kernel.org,
 Adrian Hunter <adrian.hunter@...el.com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, Ian Rogers
 <irogers@...gle.com>, Ingo Molnar <mingo@...hat.com>,
 James Clark <james.clark@...aro.org>, Jiri Olsa <jolsa@...nel.org>,
 Kan Liang <kan.liang@...ux.intel.com>, Mark Rutland <mark.rutland@....com>,
 Namhyung Kim <namhyung@...nel.org>, Peter Zijlstra <peterz@...radead.org>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: [RFC] perf bench: Adjusting concerns around
 asynchronous-signal-safety?

Hello,

The functions “gettimeofday” and “timersub” are called within the signal
handler “toggle_done” so far.
https://elixir.bootlin.com/linux/v6.10/source/tools/perf/bench/epoll-ctl.c#L90

Do such implementation details trigger any programming concerns according to
asynchronous-signal-safety?
https://wiki.sei.cmu.edu/confluence/display/c/SIG30-C.+Call+only+asynchronous-safe+functions+within+signal+handlers

Regards,
Markus