On Tue, Oct 09, 2012 at 11:13:52PM +0200, Manuel Bouyer wrote:
> There is still a reference to MAXPHYS in ufs_bmaparray(), which, if I got
> it right, will limit the *runp in VOP_BMAP(), which will limit iobytes
> in genfs_do_io().
>
> but that doens't explain why I see 32k xfers. And, to make things worse,
> I see 64k if I start the big file read with debug enabled, so it looks
> timing-dependant :(
OK, after fixing the issue I created in ra_startio(), and replacing the
MAXPHYS above with mnt_maxphys, I get:
device read KB/t r/s time MB/s write KB/t w/s time MB/s
wd0 504.22 129 0.90 63.45 0.00 0 0.90 0.00
with a 'cat big_file > /dev/null'
writes are still limited to 64k ...
--
Manuel Bouyer <bou...@antioche.eu.org>
NetBSD: 26 ans d'experience feront toujours la difference
--
