linux-kernel - Re: [PATCH 1/2] perf tools: Add reference timestamp to perf header

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, 13 Dec 2010 18:47:13 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	"David S. Ahern" <daahern@...co.com>,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] perf tools: Add reference timestamp to perf header

On Mon, 2010-12-13 at 18:35 +0100, Peter Zijlstra wrote:
>         * this CLOCK_MONOTONIC offset (for what little good that does, since
> our clock isn't strictly sync'ed to CLOCK_MONOTONIC so we can incur
> arbitrary drift). 

In fact, the only sane way to do that is by creating a software counter
that represents CLOCK_MONOTONIC and sample that say once a minute (or
more often if you want smaller drift).


--
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/