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From: Chad Versace <chad.versace@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>,
	akash.goel@intel.com, intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: Support to create uncached user mapping for a Gem object
Date: Tue, 09 Dec 2014 20:48:38 -0800	[thread overview]
Message-ID: <5487D0A6.4090402@linux.intel.com> (raw)
In-Reply-To: <20141023132336.GM13512@nuc-i3427.alporthouse.com>


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On 10/23/2014 06:23 AM, Chris Wilson wrote:
> On Thu, Oct 23, 2014 at 12:56:46PM +0100, Chris Wilson wrote:
>> On Thu, Oct 23, 2014 at 04:03:56PM +0530, akash.goel@intel.com wrote:
>>> From: Akash Goel <akash.goel@intel.com>
>>>
>>
>>> This is for improving the CPU write operation performance, as with such
>>> mapping, writes are almost 50% faster than with mmap_gtt. Also it avoids the


> Oops, bugs beware. I wasn't calling the ioctl correctly.
> Having re-run the test, I now get:
> 
>    gtt       wc    Operation
> --------  ------   ---------
> 424000.0    1.30   ShmPutImage 10x10 square 
>  29500.0    1.44   ShmPutImage 100x100 square 
>   1510.0    1.38   ShmPutImage 500x500 square 
> 
> Supporting your claims. Very nice.

What are the units for these numbers?


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  reply	other threads:[~2014-12-10  4:48 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-13 13:20 [PATCH] drm/i915: Broaden application of set-domain(GTT) Chris Wilson
2014-10-14 12:47 ` Chris Wilson
2014-10-23 10:33   ` [PATCH] drm/i915: Support to create uncached user mapping for a Gem object akash.goel
2014-10-23 10:37     ` [PATCH] intel: New libdrm interface to create uncached CPU mapping akash.goel
2014-10-23 10:54     ` [PATCH] drm/i915: Support to create uncached user mapping for a Gem object Chris Wilson
2014-10-23 11:03     ` Chris Wilson
2014-10-23 11:56     ` Chris Wilson
2014-10-23 13:23       ` Chris Wilson
2014-12-10  4:48         ` Chad Versace [this message]
2014-12-10  8:02           ` Chris Wilson
2014-10-23 16:55     ` [PATCH] drm/i915: Support creation of unbound wc user mappings for objects Chris Wilson
2014-10-23 19:05       ` [PATCH 1/3] igt/gem_evict_(alignment|everything): contend with GPU hangs Chris Wilson
2014-10-23 19:05         ` [PATCH 2/3] lib/core: Check for kernel error messages and WARN if any are found Chris Wilson
2014-10-23 19:05         ` [PATCH 3/3] reg-read-8 Chris Wilson
2014-10-23 19:12         ` [PATCH 1/3] igt/gem_evict_(alignment|everything): contend with GPU hangs Chris Wilson
2014-10-23 19:11       ` [PATCH 1/3] igt/gem_mmap_wc: Exercise mmap(wc) interface Chris Wilson
2014-10-23 19:11         ` [PATCH 2/3] igt/gem_gtt_speed: compare against WC mmaps Chris Wilson
2014-10-23 19:11         ` [PATCH 3/3] igt/gem_concurrent_blit: Exercise wc mappings Chris Wilson
2014-10-25 11:51       ` [PATCH] intel: New libdrm interface to create unbound wc user mappings for objects akash.goel
2014-10-25 12:45         ` Damien Lespiau
2014-10-26  8:36           ` Akash Goel
2014-10-26  8:41             ` Chris Wilson
2014-10-28 13:09         ` [PATCH v3] " akash.goel
2014-10-28 16:11           ` Damien Lespiau
2014-12-03 14:13           ` Damien Lespiau
2014-12-03 18:18             ` Chris Wilson
2014-12-09 10:54             ` Chris Wilson
2014-12-09 16:53               ` Damien Lespiau
2014-12-14  8:41                 ` [PATCH v4] " akash.goel
2016-03-09  9:09                   ` [PATCH v5] " akash.goel
2016-03-10  8:39                     ` Martin Peres
2016-03-14 16:51                       ` Martin Peres
2016-03-15  8:41                         ` Daniel Vetter
2015-03-03 14:20                 ` [PATCH v3] " Damien Lespiau
2015-03-03 17:05                   ` Chris Wilson
2015-03-03 17:11                     ` Damien Lespiau
2015-03-03 17:13                       ` Chris Wilson
2015-03-03 17:16                         ` Damien Lespiau
2014-11-05 12:48       ` [PATCH] drm/i915: Support creation of " Chris Wilson
2014-11-06 14:50         ` Daniel Vetter
2014-12-17 12:46       ` Tvrtko Ursulin
2014-12-17 12:52         ` Chris Wilson
2014-10-24  8:40     ` [PATCH] drm/i915: Support to create uncached user mapping for a Gem object Daniel Vetter
2014-10-24  9:23       ` Chris Wilson
2014-11-05 12:49   ` [PATCH] drm/i915: Broaden application of set-domain(GTT) Chris Wilson

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