Re: [PATCH] speed up SATA

Nick Piggin
2004-03-28T06:57:05Z

Eric D. Mudama wrote:
> On Sun, Mar 28 at 9:37, Nick Piggin wrote:
>
>> I think 32MB is too much. You incur latency and lose
>> scheduling grainularity. I bet returns start diminishing
>> pretty quickly after 1MB or so.
>
>
> 32-MB requests are the best for raw throughput.
>
> ~15ms to land at your target location, then pure 50-60MB/sec for the .5
> seconds it takes to finish the operation. (media limited at that point)
>
> Sure, there's more latency, but I guess that is application dependant.
>

What about a queue depth of 2, and writing that 32MB in 1MB requests?