linux-kernel - Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC

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]

Message-ID: <20151208085707.GC6373@twins.programming.kicks-ass.net>
Date:	Tue, 8 Dec 2015 09:57:07 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	vincent.weaver@...ne.edu, jolsa@...hat.com,
	torvalds@...ux-foundation.org, eranian@...gle.com,
	tglx@...utronix.de, acme@...hat.com, ak@...ux.intel.com,
	linux-kernel@...r.kernel.org, hpa@...or.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles:
 ppp

On Tue, Dec 08, 2015 at 09:50:26AM +0100, Peter Zijlstra wrote:
> On Tue, Dec 08, 2015 at 06:36:04AM +0100, Ingo Molnar wrote:
> 
> > So I checked my NHM box with your latest queue and it now works correctly. Do you 
> > have any idea what the difference is/was?
> 
> Sadly, no clue :/
> 
> I went over those patches and cannot find anything that should affect
> NHM (or <=SNB in fact).

Oh wait, I spoke too soon, the two new patches affect everything with
PEBS. And esp. the latter one:

  lkml.kernel.org/r/1449177740-5422-2-git-send-email-andi@...stfloor.org

But note that this is a pre-existing issue and should not be changed
by the skl-:pp and :ppp patches.


--
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/