Date: Sat, 10 Nov 2007 16:23:38 +0000 (UTC) From: Sam Leffler <sam@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/usb if_axe.c if_axereg.h Message-ID: <200711101623.lAAGNccg068642@repoman.freebsd.org>
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sam 2007-11-10 16:23:38 UTC
FreeBSD src repository
Modified files:
sys/dev/usb if_axe.c if_axereg.h
Log:
Add private tx/rx buffer management to support large frame sizes
and update the rx code to handle multiple frames in a single usb
transfer. AX772 parts (at least) exhibit many input errors when
operated with a 2K rx buffer and no errors w/ a 4K rx buffer (it's
unclear what the cause of the errors is for 2K so this may just be
covering up the real issue). Larger rx buffer sizes show no
significant performance improvement for AX772. Bypassing the common
buffer management routines also eliminates an extra context switch
on every packet which noticeably improves performance (TCP netperf
rx goes from 45 Mb/s to 85 MB/s).
Submitted by: "J.R. Oldroyd" <fbsd@opal.com>
Reviewed by: imp
Obtained from: openbsd (partly)
MFC after: 3 weeks
Revision Changes Path
1.56 +187 -102 src/sys/dev/usb/if_axe.c
1.17 +37 -8 src/sys/dev/usb/if_axereg.h
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