From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Anholt Subject: Re: Increased latency from removal of GEM_THROTTLE in 2D driver Date: Sun, 07 Nov 2010 23:37:50 -0800 Message-ID: <87fwvce04x.fsf@pollan.anholt.net> References: <1289007899.8333.4.camel@pcjc2lap> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1008527784==" Return-path: In-Reply-To: <1289007899.8333.4.camel@pcjc2lap> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Peter Clifton , "intel-gfx@lists.freedesktop.org" List-Id: intel-gfx@lists.freedesktop.org --===============1008527784== Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" --=-=-= Content-Transfer-Encoding: quoted-printable On Sat, 06 Nov 2010 01:44:59 +0000, Peter Clifton wrote: > I've been playing with my app again, and whilst it seems a tiny bit > faster in benchmarks, since the 2D driver change: >=20 > commit 8ff37667bf864b771d16a58fc5041cb48408b6a8 > Author: Eric Anholt > Date: Tue Nov 2 10:36:03 2010 -0700 >=20 > Remove the intermittent GEM_THROTTLE call. >=20 >=20 > I've noticed the latency / interactivity is WAY down, and I've also had > intermittent GPU hangs whilst benchmarking which I'd never seen before.=20 >=20 > It might be unrelated (as I'm running a back-ported drm-intel-next, and > just pulled it up to date), but for a quick check, I just reverted to a > previous 2D driver just prior to the above commit, and interactivity has > improved a lot (I don't have a number for it, just from testing). >=20 > Presumably this says something bad about my app, or its benchmarking > code. Any clues as to what that is? >=20 > Without the commit, I can use other X11 apps whilst my PCB program is > benchmarking. With it, the X11 server graphics almost completely freeze > up. I'm seeing this too, with vblank_mode=3D0 and various apps. Something appears to be broken with the swapbuffers waits in the GL driver, perhaps. --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAkzXqM4ACgkQHUdvYGzw6veJwwCbBPwFVXfr8xILw/VUG5iMbfXq l4oAnA6l/5mROc5z3ii1mCZB+qTjImmy =PZVy -----END PGP SIGNATURE----- --=-=-=-- --===============1008527784== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx --===============1008527784==--