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Message-ID: <21d7e9970811022300o2576b437kb35a55e2751889f6@mail.gmail.com> Date: Mon, 3 Nov 2008 17:00:33 +1000 From: "Dave Airlie" <airlied@...il.com> To: "Keith Packard" <keithp@...thp.com> Cc: "Ingo Molnar" <mingo@...e.hu>, "Jesse Barnes" <jbarnes@...tuousgeek.org>, "Nick Piggin" <nickpiggin@...oo.com.au>, "Dave Airlie" <airlied@...ux.ie>, "Yinghai Lu" <yinghai@...nel.org>, "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>, "Linus Torvalds" <torvalds@...ux-foundation.org> Subject: Re: io resources and cached mappings (was: [git pull] drm patches for 2.6.27-rc1) On Fri, Oct 24, 2008 at 1:39 AM, Keith Packard <keithp@...thp.com> wrote: > On Thu, 2008-10-23 at 10:05 +0200, Ingo Molnar wrote: > >> Any ballpark-figure numbers you can share with us? > > For one quake-3 based game we use for performance regression checking, > 64-bit kernels run about 18 times faster now. That's the difference > between using a zero-cost dynamic mapping and using ioremap_wc for each > page. > > -- > keith.packard@...el.com > So I've put these patches into Fedora rawhide kernel to test, and glxgears on my 945G hw went from 85fps to 380fps, clearly we would want these patches upstream sooner rather than later. Or we at least need something in the i915 driver to get the speed under GEM back up. I'm happy to ship these patches in F10 GA if that makes any difference, so I'd really like them upstream asap. Dave. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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