linux-kernel - Re: [PATCH] perf dlfilter: Add dlfilter-show-cycles

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] [day] [month] [year] [list]

Message-ID: <YTjURgpxXEFGMn2Y@kernel.org>
Date:   Wed, 8 Sep 2021 12:18:30 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Andi Kleen <ak@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf dlfilter: Add dlfilter-show-cycles

Em Tue, Sep 07, 2021 at 10:06:03AM +0300, Adrian Hunter escreveu:
> On 7/09/21 5:54 am, Andi Kleen wrote:
> > On 9/6/2021 9:08 AM, Adrian Hunter wrote:
> >> Add a new dlfilter to show cycles.

> >> Cycle counts are accumulated per CPU (or per thread if CPU is not recorded)
> >> from IPC information, and printed together with the change since the last
> >> print, at the start of each line.

> > Thanks! An example how to use it would be nice 
 
> I started looking at making an example and noticed that this approach
> does not work very well because the IPC cycle count only increases when
> the IPC is output which (for CYC accurate mode) is only happens when a
> CYC packet is output that corresponds to the current sample.  Seems like
> this needs a re-think, sorry.

Ok, will wait then. And this shows part of the value of this, checking
if it works as expected :-)

- Arnaldo