On Mon, Jun 21, 2010 at 04:25:04PM -0400, Vivek Goyal wrote: > In my testing in the past, this was helping if lots of sequential readers > are running in a system (with 100ms slice each) and if there is another > reader doing small file reads. Without meta data based preemption check, > latency of opening small file used to be very high (Because all the sync > sequntial reader gets to consume their 100ms slices first). > > Situation should be somewhat better now after corrado's changes of > reducing slice length dynamically. But I suspect that we will still > experience significantly reduced latency for small file reads in presece > of multiple sequntial reads going on. Any chance we could create a benchmark suite for the I/O schedulers? I'd really like to get these annotations correct, and having an automated suite that shows the numbers for the interesting workloads would help greatly with that. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
