linux-kernel - Re: [PATCH v3 07/12] sched: test the cpu's capacity in wake affine

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: <53BCB317.4050400@redhat.com>
Date:	Tue, 08 Jul 2014 23:12:23 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Vincent Guittot <vincent.guittot@...aro.org>, peterz@...radead.org,
	mingo@...nel.org, linux-kernel@...r.kernel.org,
	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org
CC:	preeti@...ux.vnet.ibm.com, Morten.Rasmussen@....com, efault@....de,
	nicolas.pitre@...aro.org, linaro-kernel@...ts.linaro.org,
	daniel.lezcano@...aro.org, dietmar.eggemann@....com
Subject: Re: [PATCH v3 07/12] sched: test the cpu's capacity in wake affine

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 06/30/2014 12:05 PM, Vincent Guittot wrote:
> Currently the task always wakes affine on this_cpu if the latter is
> idle. Before waking up the task on this_cpu, we check that this_cpu
> capacity is not significantly reduced because of RT tasks or irq
> activity.
> 
> Use case where the number of irq and/or the time spent under irq is
> important will take benefit of this because the task that is woken
> up by irq or softirq will not use the same CPU than irq (and
> softirq) but a idle one which share its cache.
> 
> Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>

Acked-by: Rik van Riel <riel@...hat.com>


- -- 
All rights reversed
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBAgAGBQJTvLMXAAoJEM553pKExN6DGwcIAIDInqWSTMPG1SpNPIgrDB4g
YILWx6pFhv1ZSVEiJ05jxNpDKHeAKaEFR9NrSA/Psd+0p1zZ0pazioXyVhhr92PO
2C/xnIDsxNp7Qf+Yz1OvAHdoZiBM/uOI60JU+xL3bF/npjrw6DWe4WitikAookRR
Yjwhtyj4KiVgXBYDWuES5HS5s61W+ol1F3as6KKMurfwU6JYXqJYMRZGQoymi144
5oV9enFgN3u6kXhXUMgC3vfzVW2xMr7SNDTvEDO0vqrvlIRsv07u63G0YppoMFbI
Mht3ARLZKOwR6paiju1IkBdy/4nZeAuO461hDKwb/bB5q3JdeUtXw89xbelJD1Y=
=H6O5
-----END PGP SIGNATURE-----
--
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/