linux-kernel - Re: [PATCH 04/14] perf/x86: output side-band events overhead

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: <20161123200646.GZ3092@twins.programming.kicks-ass.net>
Date:   Wed, 23 Nov 2016 21:06:46 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     kan.liang@...el.com
Cc:     mingo@...hat.com, acme@...nel.org, linux-kernel@...r.kernel.org,
        alexander.shishkin@...ux.intel.com, tglx@...utronix.de,
        namhyung@...nel.org, jolsa@...nel.org, adrian.hunter@...el.com,
        wangnan0@...wei.com, mark.rutland@....com, andi@...stfloor.org
Subject: Re: [PATCH 04/14] perf/x86: output side-band events overhead

On Wed, Nov 23, 2016 at 04:44:42AM -0500, kan.liang@...el.com wrote:
> From: Kan Liang <kan.liang@...el.com>
> 
> Iterating all events which need to receive side-band events also bring
> some overhead.
> Save the overhead information in task context or CPU context, whichever
> context is available.
> 
> Signed-off-by: Kan Liang <kan.liang@...el.com>
> ---
>  include/linux/perf_event.h      |  2 ++
>  include/uapi/linux/perf_event.h |  1 +
>  kernel/events/core.c            | 32 ++++++++++++++++++++++++++++----
>  3 files changed, 31 insertions(+), 4 deletions(-)

Guess?