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PR/43159 CVS commit: src/sys/dev/usb
The following reply was made to PR kern/43159; it has been noted by GNATS.
From: "Jonathan A. Kollasch" <jakllsch%netbsd.org@localhost>
Subject: PR/43159 CVS commit: src/sys/dev/usb
Date: Tue, 27 Jul 2010 20:20:46 +0000
Module Name: src
Committed By: jakllsch
Date: Tue Jul 27 20:20:46 UTC 2010
Tune ugen(4) isochronous parameters to better support high speed pipes.
UGEN_NISORFRMS, previously 4, is now 8 because that's the number of
microframes per frame on a high speed bus. This allows data to be
transfered every microframe if necessary.
UGEN_NISOREQS, previously 6, is now 4. This is harder to justify,
but I didn't think the total number of buffer frames needed to be
much more than it was.
UGEN_NISOFRAMES, previously 500, is now (UGEN_NISORFRMS * UGEN_NISOREQS)
(32 with values as above). This is all the more we've actually used.
To generate a diff of this commit:
cvs rdiff -u -r1.109 -r1.110 src/sys/dev/usb/ugen.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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