Date: Wed, 04 Mar 2009 13:08:00 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: hselasky@c2i.net Cc: freebsd-usb@freebsd.org, thompsa@freebsd.org Subject: Re: Low perfomance when read from usb flash drive Message-ID: <20090304.130800.-1943978022.imp@bsdimp.com> In-Reply-To: <200903042031.37578.hselasky@c2i.net> References: <200903041910.58446.hselasky@c2i.net> <20090304.114244.106970172.imp@bsdimp.com> <200903042031.37578.hselasky@c2i.net>
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In message: <200903042031.37578.hselasky@c2i.net>
Hans Petter Selasky <hselasky@c2i.net> writes:
: On Wednesday 04 March 2009, M. Warner Losh wrote:
: > : >
: > : > If you do change to filters then this is much easier with taskqueues as
: > : > it has a fast variant, otherwise you would need an intermediate step in
: > : > order to signal the existing usb threading scheme. The taskqueue
: > : > changeover will be happening soonish anyway.
: > :
: > : I am not going to do anything with filters. I'm going to try some other
: > : things.
: >
: > Then you will always have the scheduling delay...
:
: But the scheduling delay is not in the millisecond range on a 2.4GHz ??
Not typically.
Warner
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