linux-kernel - Re: [PATCH 0/4] perf: Intel uncore pmu counting 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: <CABPqkBRs1nd7KptkVCg5QeG0AJJck=VHAgCpSOJKpOgdDuN-6A@mail.gmail.com>
Date:	Thu, 30 Jun 2011 14:10:39 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] perf: Intel uncore pmu counting support

On Thu, Jun 30, 2011 at 10:09 AM, Lin Ming <ming.m.lin@...el.com> wrote:
> Hi, all
>
> I posted uncore patches months ago, but it was pended due to an uncore
> interrupt problem.
>
> This series are cut to support uncore pmu counting only.
> So uncore interrupt handling is not needed.
>
You're making the assumption that when counting, you can never construct
a measurement that will cause a counter to overflow the 39 bits. If not, then
you need interrupt handling even when counting.


> The uncore pmu type is allocated dynamically and exported via sysfs.
> $ cat /sys/bus/event_source/devices/uncore/type
> 6
>
> You can count uncore raw events as below,
> $ perf stat -e uncore:r0101 ls
>
> It reads uncore pmu type id from sysfs to setup perf_event_attr::type.
>
> Comments are appreciated.
>
> Thanks,
> Lin Ming
>
>
--
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/