On Wed, Feb 21 2007, Ingo Molnar wrote: > this is the v3 release of the syslet/threadlet subsystem: > > http://redhat.com/~mingo/syslet-patches/
[snip] Ingo, some testing of the experimental syslet queueing stuff, in the syslet-testing branch of fio. Fio job file: [global] bs=8k size=1g direct=0 ioengine=syslet-rw iodepth=32 rw=read [file] filename=/ramfs/testfile Only changes between runs was changing ioengine and iodepth as indicated in the table below. Results: Engine Depth Bw (MiB/sec) -------------------------------------------- libaio 1 441 syslet 1 574 sync 1 589 libaio 32 613 syslet 32 681 Results are stable to within +/- 1MiB/sec. So you can see that syslet are still a bit slower than sync for depth 1, but beats the pants off libaio for equal depths. Note that this is buffered IO, I'll be out for the weekend, but I'll hack some direct IO testing up next week to compare "real" queuing. Just a quick microbenchmark to gauge current overhead... -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
