linux-kernel - Re: [PATCH 2/3] perf: teach perf inject to merge sched_stat_* and sched

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Mon, 6 Aug 2012 19:00:00 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Andrey Wagin <avagin@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH 2/3] perf: teach perf inject to merge sched_stat_* and
 sched_switch events

Em Mon, Aug 06, 2012 at 11:43:04PM +0400, Andrey Wagin escreveu:
> 2012/8/6 Arnaldo Carvalho de Melo <acme@...stprotocols.net>:
> >> +struct perf_session  *session;
> 
> perf_event__sched_stat (perf_inject.sample) uses "session" for getting
> an event name. I don't know how to get it by another way

Can you try with the attached patch? We already lookup the event_format
entries when we read the perf.data header so that we can cache
evsel->name, we might as well cache the event_format in
evsel->tp_format, so that tools don't have to relookup this for each
sample.

It would look like:

	static int perf_event__sched_stat(struct perf_tool *tool,
					  union perf_event *event,
					  struct perf_sample *sample,
					  struct perf_evsel *evsel,
					  struct machine *machine)
	{
		int type;
		struct event_format *e = evsel->tp_format;
		const char *evname = e->name;

- Arnaldo

View attachment "a.patch" of type "text/plain" (661 bytes)