From mboxrd@z Thu Jan 1 00:00:00 1970 From: riel@redhat.com (Rik van Riel) Date: Tue, 08 Jul 2014 23:12:23 -0400 Subject: [PATCH v3 07/12] sched: test the cpu's capacity in wake affine In-Reply-To: <1404144343-18720-8-git-send-email-vincent.guittot@linaro.org> References: <1404144343-18720-1-git-send-email-vincent.guittot@linaro.org> <1404144343-18720-8-git-send-email-vincent.guittot@linaro.org> Message-ID: <53BCB317.4050400@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org -----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 Acked-by: Rik van Riel - -- 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-----