linux-kernel - Re: [PATCH] perf_events: fix bug in hw_perf

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, 01 Feb 2010 19:20:22 +0100
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, robert.richter@....com,
	perfmon2-devel@...ts.sf.net, eranian@...il.com,
	Arjan van de Ven <arjan@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] perf_events: fix bug in hw_perf_enable()

On Mon, 2010-02-01 at 18:56 +0100, Stephane Eranian wrote:
> On Mon, Feb 1, 2010 at 6:46 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> > On Mon, 2010-02-01 at 18:23 +0100, Stephane Eranian wrote:
> >> >  244235699509090  raw 0x13c
> >> >  244235695558036  raw 0x13c
> >> >
> >> Strange. I am running mine on a Q6600.
> >> What's yours?
> >
> > These numbers came from a T9400, but my Q9450 does something similar.
> >
> Are you sure you are reading from the correct corresponding data registers?

It sure got me wondering, I'll go over that fixed counter code in
arch/x86/kernel/cpu/perf_event.c in the morning.

--
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/