On Wed, May 20, 2009 at 5:00 PM, Dongas <dongas86@xxxxxxxxx> wrote: > 2009/5/21 Dan Williams <dcbw@xxxxxxxxxx>: >> On Wed, 2009-05-20 at 22:48 +0800, Dongas wrote: >>> 2009/5/20 John W. Linville <linville@xxxxxxxxxxxxx>: >>> > On Wed, May 20, 2009 at 01:48:32AM +0800, Dongas wrote: >>> > >>> >> Why the bandwidth is not changed when bit rate is changed to 11Mb/s? >>> >> Any thing wrong? >>> > >>> > More errors at higher bit rate, resulting in more retries? Just a >>> > thought... >>> > >>> Is there a quick way to verify this possible reason? I'm using Libertas driver. >>> >>> BTW, my sdio host driver is using polling mode to handle SDIO IRQ. >>> Could this be the cause of such poor performance? >> >> Definitely. With libertas, the largest class of issues by *far* that >> we've seen are controller related. I seem to recall that I've pulled >> about 6Mbps through the card using a normal Ricoh controller from a >> Fujitsu laptop. I can recheck that. For what it's worth, we've seen higher throughput: 20Mbps UDP and 14.7Mbps TCP using SDIO on a ThinkPad with the Ricoh controller. -Andrey -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
