From: Sascha Hauer <s.hauer@pengutronix.de>
To: vj <vicencb@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 00/14] archosg9: add support for tablet
Date: Wed, 10 Oct 2012 11:32:23 +0200 [thread overview]
Message-ID: <20121010093223.GX27665@pengutronix.de> (raw)
In-Reply-To: <CAAMcf8D0Xn6aWztkD=8dnv3P1qxNgxSV-2Q37kGOaRsOQE7xVA@mail.gmail.com>
On Wed, Oct 10, 2012 at 10:57:12AM +0200, vj wrote:
> On Wed, Oct 10, 2012 at 9:40 AM, Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > On Tue, Oct 09, 2012 at 12:55:10AM +0200, Vicente wrote:
> >> This patch series is the same as before except for:
> >> [PATCH 03/13] ARM: ensure irqs are disabled
> >> imported irq handling from linux
> >> [PATCH 07/13] uimage: improve transfer speed
> >> solved a compile warning
> >
> > I applied most of this series, please check the result in the -next
> > branch.
> >
>
> I'll check this week
Thanks.
> > Of course haven't applied this one
> >
>
> It wasn't meant to be applied
I know, just thought I'd mention it anyway
>
> >> omap4: add usb boot source
> >> bootm: close open files
> >
> >> uimage: improve transfer speed
> >
> > Haven't applied this one as you haven't answered my question how
> > much improvement (and on which media) we get.
>
> Yes, it's answered, see:
> http://lists.infradead.org/pipermail/barebox/2012-October/010208.html
Ups, missed that. That's really a huge speed gain. I wonder why this
happens. Maybe the overhead of request/release sdram region is
significant with MMU disabled. Could you play with the BUFSIZ parameter
to see if there's a good compromise between speeding up your transfer
and still sensible buffer sizes?
BTW I wonder if it would be possible to use the MMU in your setup. We
have a 1:1 flat mapping which should be no problem for the ROM code.
You probably would have to use dma_alloc_coherent to allocate the
buffers which are used for USB transfers.
Sascha
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next prev parent reply other threads:[~2012-10-10 9:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-08 22:55 Vicente
2012-10-08 22:55 ` [PATCH 01/14] twl6030: add debug info Vicente
2012-10-08 22:55 ` [PATCH 02/14] omap4: add rename definitions to match datasheet Vicente
2012-10-08 22:55 ` [PATCH 03/14] ARM: import irq handling from linux Vicente
2012-10-08 22:55 ` [PATCH 04/14] ARM: ensure irqs are disabled Vicente
2012-10-08 22:55 ` [PATCH 05/14] omap: revert gpiolib Vicente
2012-10-08 22:55 ` [PATCH 06/14] omap4: add usb boot source Vicente
2012-10-08 22:55 ` [PATCH 07/14] bootm: close open files Vicente
2012-10-08 22:55 ` [PATCH 08/14] uimage: improve transfer speed Vicente
2012-10-08 22:55 ` [PATCH 09/14] fs: improve robustness Vicente
2012-10-08 22:55 ` [PATCH 10/14] omap4: add support for booting cpu from usb Vicente
2012-10-08 22:55 ` [PATCH 11/14] omap4: add serial communications over usb boot Vicente
2012-10-08 22:55 ` [PATCH 12/14] omap4: add filesystem support " Vicente
2012-10-08 22:55 ` [PATCH 13/14] omap4: add support for loading second stage from usb Vicente
2012-10-08 22:55 ` [PATCH 14/14] Add support for Archos G9 tablet Vicente
2012-10-19 11:10 ` Jan Weitzel
2012-10-21 1:00 ` vj
2012-10-22 6:50 ` Jan Weitzel
2012-10-10 7:40 ` [PATCH 00/14] archosg9: add support for tablet Sascha Hauer
[not found] ` <CAAMcf8D0Xn6aWztkD=8dnv3P1qxNgxSV-2Q37kGOaRsOQE7xVA@mail.gmail.com>
2012-10-10 9:32 ` Sascha Hauer [this message]
2012-10-12 1:12 ` vj
[not found] ` <CAAMcf8CLimKWZddBfctSCct0wOJOk7tgTJpM7m_w8h5dOQRt1Q@mail.gmail.com>
2012-10-12 8:39 ` Sascha Hauer
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