2012/12/14 Jens Axboe <jaxboe@xxxxxxxxxxxx>: > On Mon, Dec 03 2012, Kent Overstreet wrote: >> Last posting: http://thread.gmane.org/gmane.linux.kernel.aio.general/3169 >> >> Changes since the last posting should all be noted in the individual >> patch descriptions. >> >> * Zach pointed out the aio_read_evt() patch was calling functions that >> could sleep in TASK_INTERRUPTIBLE state, that patch is rewritten. >> * Ben pointed out some synchronize_rcu() usage was problematic, >> converted it to call_rcu() >> * The flush_dcache_page() patch is new >> * Changed the "use cancellation list lazily" patch so as to remove >> ki_flags from struct kiocb. > > Kent, I ran a few tests, and the below patches still don't seem as fast > as the approach I took. To keep it fair, I used your aio branch and > applied by dio speedups too. As a sanity check, I ran with your branch > alone as well. The quick results below - kaio is kent-aio, just your > branch. kaio-dio is with the direct IO speedups too. jaio is my branch, > which already has the dio changes too. > > Devices Branch IOPS > 1 kaio ~915K > 1 kaio-dio ~930K > 1 jaio ~1220K > 6 kaio ~3050K > 6 kaio-dio ~3080K > 6 jaio 3500K > > The box runs out of CPU driving power, which is why it doesn't scale > linearly, otherwise I know that jaio at least does. It's basically > completion limited for the 6 device test at the moment. > > I'll run some profiling tomorrow morning and get you some better > results. Just thought I'd share these at least. > > -- > Jens Axboe > A really good performance, woo. I think the device tested is really fast PCIe SSD builded by fusionio with fusionio in house block driver? any compare number with current mainline? Jack -- 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
