From: Jens Axboe <axboe@kernel.dk>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
DRI Development <dri-devel@lists.freedesktop.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: __i915_spin_request() sucks
Date: Fri, 13 Nov 2015 09:22:52 -0700 [thread overview]
Message-ID: <56460E5C.6000602@kernel.dk> (raw)
In-Reply-To: <1447431225.5655.66.camel@gmail.com>
On 11/13/2015 09:13 AM, Mike Galbraith wrote:
> On Fri, 2015-11-13 at 08:36 -0700, Jens Axboe wrote:
>> Previous patch was obvious pre-coffee crap, this should work for using
>> ktime to spin max 1usec.
>
> 1us seems a tad low. I doubt the little wooden gears and pulleys of my
> core2 Toshiba Satellite lappy can get one loop ground out in a usec :)
Maybe it is, it's based off the original intent of the function, though.
See the original commit referenced.
--
Jens Axboe
next prev parent reply other threads:[~2015-11-13 16:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-12 20:36 __i915_spin_request() sucks Jens Axboe
2015-11-12 20:40 ` Jens Axboe
2015-11-12 22:19 ` Chris Wilson
2015-11-12 22:19 ` Chris Wilson
2015-11-12 22:52 ` Jens Axboe
2015-11-12 22:59 ` Jens Axboe
2015-11-13 9:15 ` Chris Wilson
2015-11-13 15:12 ` Jens Axboe
2015-11-13 15:36 ` Jens Axboe
2015-11-13 16:13 ` Mike Galbraith
2015-11-13 16:22 ` Jens Axboe [this message]
2015-11-13 22:12 ` Chris Wilson
2015-11-13 22:12 ` Chris Wilson
2015-11-13 22:16 ` Jens Axboe
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