Date: Mon, 28 Sep 2009 11:42:08 +0800 From: Eugene Grosbein <eugen@kuzbass.ru> To: usb@freebsd.org Cc: Hans Petter Selasky <hselasky@freebsd.org> Subject: Re: 8.0-RC1: AMD CS5536 (Geode) USB 2.0 controller strange behavour Message-ID: <20090928034208.GA64444@svzserv.kemerovo.su> In-Reply-To: <200909271940.32878.hselasky@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
>> I've repeated the test with my USB flash drive formatted as FAT32. >> It gives the same result: for ICH7-based system I get 26 megabyte/s >> file writing speed and for AMD CS5536 it suffers from long periods of >> inactivity while writing data, hence very low awarage writing speed. >> >> It seems the root of the problem is in the interaction >> between USB stack and AMD CS5536 (Geode) USB 2.0 controller >> and not in media devices themselves. >> >> Any more hints please? > > sysctl hw.usb.ehci.debug=15 For USB HDD: %sysctl hw.usb.ehci.debug=15 hw.usb.ehci.debug: 0 -> 15 %date; dd if=/dev/zero bs=64k of=/dev/da0 count=100; date Mon Sep 28 11:25:26 KRAST 2009 100+0 records in 100+0 records out 6553600 bytes transferred in 14.912198 secs (439479 bytes/sec) Mon Sep 28 11:25:43 KRAST 2009 The log is half-megabyte and is available here (13KB compressed): http://www.grosbein.pp.ru/ehci.log.gz > If the USB stack puts the new job into the schedule and the USB controller > does not pick it up, it is not an USB stack problem ... If so, any workarounds possible? Eugene Grisbeibn
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20090928034208.GA64444>