svn commit: r219699 - head/sys/kern

[Garrett Cooper]

On Wed, Mar 16, 2011 at 12:51 PM, Ivan Voras <ivoras at freebsd.org> wrote:
> On 16 March 2011 18:46, Roman Divacky <rdivacky at freebsd.org> wrote:
>>
>> On Wed, Mar 16, 2011 at 04:22:59PM +0000, Ivan Voras wrote:
>> > Author: ivoras
>> > Date: Wed Mar 16 16:22:59 2011
>> > New Revision: 219699
>> > URL: http://svn.freebsd.org/changeset/base/219699
>> >
>> > Log:
>> >   The hardware has caught up; improvements are now observed even at 128,
>> >   but stay conservative and bump read_max to "only" 64 (it will probably be
>> >   a good idea to increase this to 128 after the next major release).
>>
>> how did you measure this?
>
> Specifically for this commit: my desktop 2xSATA 7200 RPM drives,
> gmirror, single read "dd" stream, bs=1m. (Are there any ready read
> multi-stream read tests which are not trivial i.e. they start from
> different positions in the file?)

Would be interesting to see how well things work with the new
geom_raid bits and with other drives (SAS, SCSI).
Thanks,
-Garrett