linux-kernel - Re: [PATCH v4 00/11] perf: Intel Cache QoS Monitoring support

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: <20141125145509.GB3331@console-pimps.org>
Date:	Tue, 25 Nov 2014 14:55:09 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Andi Kleen <andi@...stfloor.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Kanaka Juvva <kanaka.d.juvva@...el.com>,
	Matt Fleming <matt.fleming@...el.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v4 00/11] perf: Intel Cache QoS Monitoring support

On Fri, 14 Nov, at 09:15:01PM, Matt Fleming wrote:
> From: Matt Fleming <matt.fleming@...el.com>
> 
> This patch series adds a new PMU driver for the Intel Cache Monitoring
> hardware feature available in Intel Xeon processors, which allows
> monitoring of LLC occupancy on a task, group or system-wide basis.
> 
> The first few patches modify tools/perf to handle per-package counters,
> which necessitates discarding some values when doing per-cpu reads to
> avoid getting duplicate data. The rest add support for the new PMU code.
> 
> I've left a notoriously funky bit of code near the end of the series,
> the RMID rotation code, in an attempt to simplify things. Doing the
> rotation provides the ability to multiplex the RMIDs and basically
> overcome the hardware limitation, but the rest of the patches work fine
> without it. But there are a number of scenarios where being able to
> monitor more tasks than RMIDs is extremely useful.
> 
> The series is based on tip/perf/core.

Any feedback on this series?

Stephane, the original thread is here, 

  https://lkml.kernel.org/r/1415999712-5850-1-git-send-email-matt@console-pimps.org

-- 
Matt Fleming, Intel Open Source Technology Center
--
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/