From: Venkatesh Srinivas <me@endeavour.zapto.org>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] ctrl radeon: not working for ATI Radeon 9600 Mobility?
Date: Sat, 1 May 2010 18:48:48 -0400 [thread overview]
Message-ID: <n2qf75780241005011548q2a5f80b5hf570f8bd1b81514c@mail.gmail.com> (raw)
In-Reply-To: <cbdd776d81705893e47ed49a41671e1c@kw.quanstro.net>
> [...] the main slowdown
> is reading from the hardware framebuffer, which plan 9 does a lot.
Where in the draw path does Plan 9 read back from the framebuffer? Why so much?
Also, there is apparently a fast way to read-back on radeon series h/w
- map some system memory on the card via the GART and do the same
dance that drm's r100_copy_blit does. If the formats are amenable, it
might be nice to expose cards' fast download-from-screen features, by
adding something like Ctrl->dfs() or the like...
-- vs
next prev parent reply other threads:[~2010-05-01 22:48 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <d7a540d6-2751-4e30-8766-e3511bb8c202@g11g2000yqe.googlegroups.co>
2010-04-26 13:15 ` erik quanstrom
2010-04-29 9:58 ` Anton.Pavlovetsky
[not found] ` <7caa7a0a-fb6d-4ffa-81ef-ad3256100f2c@g21g2000yqk.googlegroups.co>
2010-04-29 11:17 ` erik quanstrom
2010-04-29 12:44 ` Venkatesh Srinivas
2010-04-30 8:53 ` Anton.Pavlovetsky
2010-04-30 8:53 ` Anton.Pavlovetsky
[not found] ` <9e5fc5ec-43d5-4cf3-be92-3fc8c4829ba0@l32g2000yqm.googlegroups.co>
2010-04-30 12:07 ` erik quanstrom
2010-04-30 12:30 ` Gabriel Díaz
2010-05-01 13:53 ` Venkatesh Srinivas
2010-05-01 14:08 ` erik quanstrom
2010-05-01 19:05 ` Venkatesh Srinivas
2010-05-01 22:48 ` Venkatesh Srinivas [this message]
2010-05-02 0:42 ` erik quanstrom
2010-05-04 8:47 ` Anton.Pavlovetsky
2010-04-26 11:17 Anton.Pavlovetsky
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