linux-kernel - Re: [PATCH 02/10] perf, tools, stat: Force --per-core mode for .agg-per-core aliases

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20151221161604.GC21700@krava.brq.redhat.com>
Date:	Mon, 21 Dec 2015 17:16:04 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, peterz@...radead.org, jolsa@...nel.org,
	mingo@...nel.org, linux-kernel@...r.kernel.org, eranian@...gle.com,
	namhyung@...nel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 02/10] perf, tools, stat: Force --per-core mode for
 .agg-per-core aliases

On Tue, Dec 15, 2015 at 04:54:18PM -0800, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> When an event alias is used that the kernel marked as .agg-per-core, force
> --per-core mode (and also require -a and forbid cgroups or per thread mode).
> This in term means, --topdown forces --per-core mode.
> 
> This is needed for TopDown in SMT mode, because it needs to measure
> all threads in a core together and merge the values to compute the correct
> percentages of how the pipeline is limited.
> 
> We do this if any alias is agg-per-core.
> 
> Add the code to parse the .agg-per-core attributes and propagate
> the information to the evsel. Then the main stat code does
> the necessary checks and forces per core mode.

please split it into 2 patches:
  - support .aggr-per-core alias parsing
  - force --per-core mode for .agg-per-core aliases

thanks,
jirka
--
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/