Re: Warning - running *really* short on DMA buffers while doing file transfers

Jens Axboe
2002-09-27T07:19:38Z

On Fri, Sep 27 2002, Matthew Jacob wrote:
> >
> > So I think the 'more tags the better!' belief is very much bogus, at
> > least for the common case.
>
> Well, that's one theory.

Numbers talk, theory spinning walks

Both Andrew and I did latency numbers for even small depths of tagging,
and the result was not pretty. Sure this is just your regular plaino
SCSI drives, however that's also what I care most about. People with
big-ass hardware tend to find a way to tweak them as well, I'd like the
typical systems to run fine out of the box though.

--
Jens Axboe