Re: CVS commit: [tls-maxphys] src/sys/dev

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

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 <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--