linux-kernel - Re: [PATCH] perf_events: fix time tracking in samples

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] [day] [month] [year] [list]

Message-ID: <1287579879.3488.14.camel@twins>
Date:	Wed, 20 Oct 2010 15:04:39 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, paulus@...ba.org,
	davem@...emloft.net, fweisbec@...il.com,
	perfmon2-devel@...ts.sf.net, eranian@...il.com,
	robert.richter@....com
Subject: Re: [PATCH] perf_events: fix time tracking in samples

On Wed, 2010-10-20 at 14:42 +0200, Stephane Eranian wrote:
> It may be better to try another approach just for PERF_SAMPLE_READ
> with its own version of ctx->time. What about if on event_sched_in() you
> were snapshotting  ctx->time. Then in the perf_output_read_event(), you'd
> have to compute the time delta and add it to this private version of
> ctx->time and store that in the sample. 

Right, that might work.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/