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List:       flashrom
Subject:    Re: [flashrom] [PATCH 2/4] dediprog: Use asynchronous bulk transfers for reading
From:       Stefan Tauner <stefan.tauner () alumni ! tuwien ! ac ! at>
Date:       2016-01-24 19:21:56
Message-ID: 201601241922.u0OJLvD1017673 () mail2 ! student ! tuwien ! ac ! at
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On Sat, 30 Mar 2013 20:31:33 +0200
Kyösti Mälkki <kyosti.malkki@gmail.com> wrote:

> From: Nico Huber <nico.huber@secunet.com>
> 
> This utilizes libusb-1.0's interface for asynchronous transfers. A read
> is split into 512 byte chunks as required by the dediprog hardware. Up
> to eight chunks are scheduled for asynchronous transfer which results in
> a viable speed-up. First tests have shown a three times speed increase.
> 
> Signed-off-by: Nico Huber <nico.huber@secunet.com>

Since we default to dediprog support now I have backported that patch
but I don't see any speed up at all. Nico said the speedup was seen
when using VirtualBox (Linux on Linux). I have tested with Linux
native and Windows XP guest on Linux but don't see any difference.
I will repost my version of the patch later tonight.

-- 
Kind regards/Mit freundlichen Grüßen, Stefan Tauner

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