On Tue, Sep 20, 2011 at 03:19:53PM -0700, Ben Widawsky wrote:
> On Tue, 20 Sep 2011 13:06:43 +0200
> Daniel Vetter wrote:
> > - I'm sorry having suggested to implement the clflush ioctl, I think
> > it's a foolish idea, now. Non-blocking mmaps is a performance
> > optimization, needing to sync cac
On Tue, Sep 20, 2011 at 10:16:39PM +0100, Chris Wilson wrote:
> On Tue, 20 Sep 2011 13:06:43 +0200, Daniel Vetter wrote:
> > Now non-blocking cpu mmaps make very much sense on llc/snooped buffer
> > objects. So I think we actually need an ioctl to get obj->cache_level so
> > userspace can de
On Tue, 20 Sep 2011 13:06:43 +0200
Daniel Vetter wrote:
> On Mon, Sep 19, 2011 at 09:25:00PM -0700, Ben Widawsky wrote:
> > I'm going to keep this short...
> > Patch 5 is my test case.
> > On Gen6 I see slightly better performance. On Gen5 I see really
> > really improvements (like 3x) for non GT
On Tue, 20 Sep 2011 13:06:43 +0200, Daniel Vetter wrote:
> Now non-blocking cpu mmaps make very much sense on llc/snooped buffer
> objects. So I think we actually need an ioctl to get obj->cache_level so
> userspace can decide whether it should use non-blocking gtt mmaps or cpu
> (non-bloc
On Tue, Sep 20, 2011 at 10:17:25AM -0700, Eric Anholt wrote:
> On Tue, 20 Sep 2011 13:06:43 +0200, Daniel Vetter wrote:
> > - Why do we need any patches for gtt non-blocking mmaps? I've re-read our
> > code, and afaics we're only calling wait_rendering from gem_fault if
> > obj->gtt_space == N
On Tue, 20 Sep 2011 13:06:43 +0200, Daniel Vetter wrote:
> - Why do we need any patches for gtt non-blocking mmaps? I've re-read our
> code, and afaics we're only calling wait_rendering from gem_fault if
> obj->gtt_space == NULL. I.e. there's no way the gpu is currently using
> the data and
On Mon, Sep 19, 2011 at 09:25:00PM -0700, Ben Widawsky wrote:
> I'm going to keep this short...
> Patch 5 is my test case.
> On Gen6 I see slightly better performance. On Gen5 I see really really
> improvements (like 3x) for non GTT write only maps over regular mmaps.
> GTT mappings don't really sh
I'm going to keep this short...
Patch 5 is my test case.
On Gen6 I see slightly better performance. On Gen5 I see really really
improvements (like 3x) for non GTT write only maps over regular mmaps.
GTT mappings don't really show any improvements as a whole.
Better tests would be nice, but without
