Date: Sun, 18 Feb 2007 22:47:47 -0300 From: JoaoBR <joao@matik.com.br> To: freebsd-stable@freebsd.org Cc: Michael Nottebrock <lofi@freebsd.org>, Ivan Voras <ivoras@fer.hr> Subject: Re: Very slow umass in 6.2-RC2 Message-ID: <200702182247.48405.joao@matik.com.br> In-Reply-To: <200702171236.23084.lofi@freebsd.org> References: <20070215210327.E554E45053@ptavv.es.net> <200702171236.23084.lofi@freebsd.org>
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On Saturday 17 February 2007 09:36, Michael Nottebrock wrote: > 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 mul= ti > 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) I get something between 2-2.5MB when copying from my Sony camera which has = a=20 1Gb card. It does not matter if I copy 10 or 400Mb it is ever the same. I=20 never uploaded anything and have no windows to compare but I ever thought t= he=20 low speed is caused by the device and not by the computer's port. I have a= =20 MP3 with 512MB no card (integrated memory or something) and I can upload wi= th=20 5-6Mb/s to it. It makes no difference if I connect it to ohci or ehci ports= =2E=20 Then from my cellphone I never get more than 800kb/s. =2D-=20 Jo=E3o A mensagem foi scaneada pelo sistema de e-mail e pode ser considerada segura. Service fornecido pelo Datacenter Matik https://datacenter.matik.com.br
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