Re: [linux-usb-devel] optimizing throughput

2003-02-05 Thread David Brownell
Duncan Sands wrote: On Tuesday 04 February 2003 22:53, David Brownell wrote: Duncan Sands wrote: (1) is there any speed advantage to submitting multiple urbs to a bulk endpoint, as compared to using a single urb which is resubmitted in its completion handler? Yes, most noticeably at high spe

Re: [linux-usb-devel] optimizing throughput

2003-02-05 Thread Duncan Sands
On Tuesday 04 February 2003 22:53, David Brownell wrote: > Duncan Sands wrote: > > (1) is there any speed advantage to submitting multiple urbs to > > a bulk endpoint, as compared to using a single urb which is > > resubmitted in its completion handler? > > Yes, most noticeably at high speed where

Re: [linux-usb-devel] optimizing throughput

2003-02-05 Thread Duncan Sands
On Tuesday 04 February 2003 17:04, Duncan Sands wrote: > (1) is there any speed advantage to submitting multiple urbs to > a bulk endpoint, as compared to using a single urb which is > resubmitted in its completion handler? > (2) is there a noticeable speed difference if you send a buffer > in many

Re: [linux-usb-devel] optimizing throughput

2003-02-04 Thread David Brownell
Duncan Sands wrote: (1) is there any speed advantage to submitting multiple urbs to a bulk endpoint, as compared to using a single urb which is resubmitted in its completion handler? Yes, most noticeably at high speed where the time to report the completion and resubmit the urb can easily be eno

[linux-usb-devel] optimizing throughput

2003-02-04 Thread Duncan Sands
(1) is there any speed advantage to submitting multiple urbs to a bulk endpoint, as compared to using a single urb which is resubmitted in its completion handler? (2) is there a noticeable speed difference if you send a buffer in many small pieces (-> many urb submissions) as compared to sending it