linux-kernel - Re: [patch] Performance Counters for Linux, v2

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: <20081209110246.GC21618@elte.hu>
Date:	Tue, 9 Dec 2008 12:02:46 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	eranian@...il.com
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	linux-arch@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Eric Dumazet <dada1@...mosbay.com>,
	Robert Richter <robert.richter@....com>,
	Arjan van de Veen <arjan@...radead.org>,
	Peter Anvin <hpa@...or.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	David Miller <davem@...emloft.net>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [patch] Performance Counters for Linux, v2


* stephane eranian <eranian@...glemail.com> wrote:

> > There's also more generic x86 support: all 4 generic PMCs of Nehalem 
> > / Core i7 are supported - i've run 4 instances of KernelTop and they 
> > used up four separate PMCs.
>
> Core/Atom have 5 counters, Nehalem has 7. Why are you not using all of 
> them already?

no, Nehalem has 4 generic purpose PMCs and 3 fixed-purpose PMCs (7 
total), Core/Atom has 2 generic PMCs and 3 fixed-purpose PMCs (5 total). 
Saying that it has 7 is misleading. (and even the generic PMCs have 
constraints)

	Ingo
--
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/