Date: Sat, 17 Feb 2007 12:36:19 +0100 From: Michael Nottebrock <lofi@freebsd.org> To: freebsd-stable@freebsd.org Cc: Ivan Voras <ivoras@fer.hr> Subject: Re: Very slow umass in 6.2-RC2 Message-ID: <200702171236.23084.lofi@freebsd.org> In-Reply-To: <20070215210327.E554E45053@ptavv.es.net> References: <20070215210327.E554E45053@ptavv.es.net>
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[-- Attachment #1 --] Has anyone ever managed to get some USB 2.0 - like speeds out of ehci anyway? I'm not seeing quite such abysmal performance as Kevin did, but I don't even need to benchmark to be certain that Windows does *much* better with the devices I own. Here are some numbers: First up, the controller: ehci0: <VIA VT6202 USB 2.0 controller> mem 0xdfffbd00-0xdfffbdff irq 21 at device 16.4 on pci0 usb4: <VIA VT6202 USB 2.0 controller> on ehci0 usb4: USB revision 2.0 To be sure the umass device is actually a child of the ehci device: dev.umass.0.%parent: uhub4 dev.uhub.4.%parent: usb4 This is a Panasonic "Pro High Speed" series 512mb SD-CARD, which theoretically supports burst transfer rates up to 20MB/s on a USB 2.0 multi card reader: da2 at umass-sim0 bus 0 target 0 lun 2 da2: <Hama CardReaderMMC/SD 1.9C> Removable Direct Access SCSI-0 device da2: 40.000MB/s transfers da2: 472MB (967680 512 byte sectors: 64H 32S/T 472C) vmstat while running bonnie -s 472 (I don't have bonnie results, since it would have taken forever to finish): Disks ad0 ad4 da0 da1 da2 da3 pass0 KB/t 16.00 0.00 0.00 0.00 12.01 0.00 0.00 tps 1 0 0 0 154 0 0 MB/s 0.02 0.00 0.00 0.00 1.80 0.00 0.00 % busy 0 0 0 0 99 0 0 This is a Trekstor Vibez portable music player, which comes with an 8GB microdrive and an USB 2.0 interface, again with bonnie: umass0: TrekStor vibez, rev 2.00/1.10, addr 2 da0 at umass-sim0 bus 0 target 0 lun 0 da0: <TrekStor vibez 2> Removable Direct Access SCSI-4 device da0: 40.000MB/s transfers da0: 7613MB (15592237 512 byte sectors: 255H 63S/T 970C) Disks ad0 ad4 da0 pass0 KB/t 12.73 0.00 4.00 0.00 tps 2 0 339 0 MB/s 0.03 0.00 1.32 0.00 % busy 1 0 100 0 -- ,_, | Michael Nottebrock | lofi@freebsd.org (/^ ^\) | FreeBSD - The Power to Serve | http://www.freebsd.org \u/ | K Desktop Environment on FreeBSD | http://freebsd.kde.org [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQBF1ui3Xhc68WspdLARAuNvAJ4uN3vGBLkeiiRstFD8K0upklKjEQCfYDz5 4OJaDUQEsnnrrUJdjgNul0I= =e8KP -----END PGP SIGNATURE-----
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