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@xxxxxxxxxxxxxx> 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 -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
