From: Richard Miller <9fans@hamnavoe.com>
To: 9fans@9fans.net
Subject: Re: [9fans] usbether
Date: Mon, 1 Oct 2012 20:20:18 +0100 [thread overview]
Message-ID: <868c557b9825d7f054aa7e77fe90cd60@hamnavoe.com> (raw)
In-Reply-To: <1c5584910a3ef640f8f4a6510a0e2aa4@kw.quanstro.net>
> of course the 64bit question is, which queue is dropping packets.
> there are so many to choose from.
Looks my initial guess was wrong. I added some readahead to the kernel
usb driver and that didn't help at all. Then I reduced the device's
buffering ("burst factor"), and increased the intermediate buffering
between input and output processes in the generic part of the usb/ether
driver. That seems to have done the trick: no more dropped packets.
That's with the raspberry pi built-in usb ether. My asix-based ethernet
dongle doesn't work any better on an x86 host; but at least it doesn't
work any worse. Geoff has pushed the new usb/ether code onto sources.
Anybody who is actually using usb/ether - could you try the new version
and let us know if we've broken yours?
next prev parent reply other threads:[~2012-10-01 19:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-29 16:16 Richard Miller
2012-09-29 16:39 ` Gorka Guardiola
2012-09-29 17:03 ` erik quanstrom
2012-09-29 18:01 ` Richard Miller
2012-09-29 18:19 ` Gorka Guardiola
2012-09-29 18:24 ` Richard Miller
2012-09-29 21:38 ` Gorka Guardiola
2012-09-29 21:46 ` Richard Miller
2012-09-29 21:48 ` erik quanstrom
2012-10-01 19:20 ` Richard Miller [this message]
2012-09-30 9:20 ` Charles Forsyth
2012-09-30 10:24 ` Richard Miller
2012-09-30 13:54 ` Charles Forsyth
2012-09-29 18:41 ` erik quanstrom
2012-09-29 19:49 ` Charles Forsyth
2012-09-30 23:29 ` Tristan
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