On Mon, 2017-11-27 at 13:36 +0000, Rantala, Valtteri wrote: > > -----Original Message----- > > From: Joonas Lahtinen [mailto:joonas.lahtinen@xxxxxxxxxxxxxxx] > > Sent: Monday, November 27, 2017 11:13 AM > > To: Intel graphics driver community testing & development <intel- > > gfx@xxxxxxxxxxxxxxxxxxxxx> > > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>; Auld, Matthew > > <matthew.auld@xxxxxxxxx>; Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>; Jani > > Nikula <jani.nikula@xxxxxxxxxxxxxxx>; Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx>; > > Rantala, Valtteri <valtteri.rantala@xxxxxxxxx>; Tamminen, Eero T > > <eero.t.tamminen@xxxxxxxxx> > > Subject: [PATCH] drm/i915: Disable THP until we have a GPU read BW W/A > > > > We seem to be missing some W/A for 2M pages and are getting a hit on raw > > GPU read bandwidths (even 30%) even though the GPU write bandwidths > > improve (even 10%). > > > > For now, disable THP, which is our only practical source of 2M pages until we > > have a W/A for the issue. > > > > v2: > > - Be explicit that we talk about GPU bandwidths (Eero) > > - s/deny/never/ because that's why (Chris) > > > > Reported-by: Valtteri Rantala <valtteri.rantala@xxxxxxxxx> > > Fixes: b901bb89324a ("drm/i915/gemfs: enable THP") > > Signed-off-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> > > Cc: Matthew Auld <matthew.auld@xxxxxxxxx> > > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > > Cc: Valtteri Rantala <valtteri.rantala@xxxxxxxxx> > > Cc: Eero Tamminen <eero.t.tamminen@xxxxxxxxx> > > Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx> > > Tested-by: Valtteri Rantala <valtteri.rantala@xxxxxxxxx> I'm merging the patch, thanks for the report, reviews and testing! Regards, Joonas -- Joonas Lahtinen Open Source Technology Center Intel Corporation _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
