From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Antonino Daplas <adaplas@pol.net>,
James Simmons <jsimmons@infradead.org>,
eger-dated-1082943669.d79d33@theboonies.us,
Linux Fbdev development list
<linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: [PATCH] radeonfb(): memmove() fix -- this one works ;-)
Date: Wed, 21 Apr 2004 20:36:22 +1000 [thread overview]
Message-ID: <1082543782.2076.66.camel@gaston> (raw)
In-Reply-To: <Pine.GSO.4.58.0404211027300.7657@waterleaf.sonytel.be>
On Wed, 2004-04-21 at 18:28, Geert Uytterhoeven wrote:
> On Wed, 21 Apr 2004, Benjamin Herrenschmidt wrote:
> > > I find that a soft copyarea is always expensive than a soft imageblit as a
> > > copyarea will involve an fb read (10-20x slower than fb write). Tested
> > > this before with an old pci nvidia card. Not o sure with newer hardware.
> >
> > I confirm, reading from the fb shall be avoided at all cost
>
> This is true for PCI/AGP, but may not be true for unified memory systems.
Right, but that confirms my opinion that the choice of the technique used
shall be under control of the driver
Ben.
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next prev parent reply other threads:[~2004-04-21 10:37 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-19 1:46 [PATCH] radeonfb(): memmove() fix -- this one works ;-) David Eger
2004-04-19 1:50 ` Benjamin Herrenschmidt
2004-04-19 1:52 ` Benjamin Herrenschmidt
2004-04-20 22:52 ` James Simmons
2004-04-21 0:30 ` Benjamin Herrenschmidt
2004-04-21 18:03 ` James Simmons
2004-04-21 23:08 ` Benjamin Herrenschmidt
[not found] ` <12573.10.250.10.1.1082504618.squirrel@sq01.pol.net>
2004-04-21 0:30 ` Benjamin Herrenschmidt
2004-04-21 8:28 ` Geert Uytterhoeven
2004-04-21 10:36 ` Benjamin Herrenschmidt [this message]
2004-04-21 10:50 ` Geert Uytterhoeven
2004-04-21 18:13 ` James Simmons
2004-04-21 19:35 ` Antonino A. Daplas
2004-04-22 8:22 ` Geert Uytterhoeven
2004-04-27 0:19 ` James Simmons
2004-04-27 0:22 ` Benjamin Herrenschmidt
2004-04-27 8:51 ` Geert Uytterhoeven
2004-04-27 9:43 ` David Eger
2004-04-27 9:57 ` Geert Uytterhoeven
2004-04-27 10:09 ` Benjamin Herrenschmidt
2004-04-27 11:19 ` Geert Uytterhoeven
2004-04-27 22:41 ` John Zielinski
2004-04-27 10:10 ` Benjamin Herrenschmidt
2004-04-27 11:21 ` Geert Uytterhoeven
2004-04-27 20:28 ` James Simmons
2004-04-27 20:27 ` James Simmons
2004-04-27 22:28 ` John Zielinski
2004-04-27 22:33 ` James Simmons
2004-04-27 22:59 ` John Zielinski
2004-04-27 23:14 ` Benjamin Herrenschmidt
2004-04-27 23:24 ` James Simmons
2004-04-27 23:28 ` Benjamin Herrenschmidt
2004-04-27 23:57 ` James Simmons
2004-04-28 0:12 ` Benjamin Herrenschmidt
2004-04-28 1:12 ` John Zielinski
2004-04-28 1:50 ` Benjamin Herrenschmidt
2004-04-28 16:51 ` James Simmons
2004-04-28 0:18 ` John Zielinski
2004-04-27 23:02 ` Benjamin Herrenschmidt
2004-04-27 23:18 ` James Simmons
2004-04-27 23:25 ` Benjamin Herrenschmidt
2004-04-27 23:51 ` James Simmons
2004-04-27 23:53 ` Benjamin Herrenschmidt
2004-04-28 8:41 ` Geert Uytterhoeven
2004-04-28 10:00 ` Benjamin Herrenschmidt
2004-04-28 16:48 ` James Simmons
2004-04-28 23:31 ` Benjamin Herrenschmidt
2004-04-29 0:02 ` James Simmons
2004-04-29 0:50 ` Benjamin Herrenschmidt
2004-04-29 18:01 ` James Simmons
2004-04-29 18:11 ` Otto Solares
[not found] ` <20040429194813.GA8799@dreamland.darkstar.lan>
2004-04-29 20:13 ` Otto Solares
2004-04-30 16:03 ` James Simmons
2004-04-29 21:58 ` Benjamin Herrenschmidt
2004-04-30 16:05 ` James Simmons
2004-04-30 23:57 ` Benjamin Herrenschmidt
2004-04-28 16:29 ` James Simmons
2004-04-28 17:56 ` Geert Uytterhoeven
2004-04-28 19:05 ` James Simmons
2004-04-28 23:00 ` John Zielinski
2004-04-28 23:29 ` Benjamin Herrenschmidt
2004-04-29 0:26 ` James Simmons
2004-04-29 0:38 ` Otto Solares
2004-04-29 8:28 ` [PATCH] radeonfb(): memmove() fix -- this one works ; -) Geert Uytterhoeven
2004-04-28 1:00 ` [PATCH] radeonfb(): memmove() fix -- this one works ;-) John Zielinski
2004-04-28 16:38 ` James Simmons
2004-04-28 22:11 ` John Zielinski
2004-04-28 4:43 ` Alex Stewart
2004-04-28 17:54 ` James Simmons
2004-04-28 21:51 ` Alex Stewart
2004-04-28 21:52 ` James Simmons
2004-04-28 23:35 ` Alex Stewart
2004-04-27 23:54 ` John Zielinski
2004-04-28 0:47 ` Antonino A. Daplas
2004-04-28 8:35 ` [PATCH] radeonfb(): memmove() fix -- this one works ; -) Geert Uytterhoeven
2004-04-28 17:14 ` James Simmons
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