On 07/25/2013 01:19 PM, Matthew Eaton wrote: > On Thu, Jul 25, 2013 at 11:17 AM, Jens Axboe <axboe@xxxxxxxxx> wrote: >> Please don't top post... >> >> On 07/25/2013 11:27 AM, Matthew Eaton wrote: >>> Hi Jens, >>> >>> I'm running Ubuntu 12.04.2, my kernel is: >>> >>> Linux matt-work 3.5.0-36-generic #57~precise1-Ubuntu SMP Thu Jun 20 >>> 18:21:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux >>> >>> Here is the output I got from blktrace / blkparse: >>> >>> Total (sdb): >>> Reads Queued: 166, 664KiB Writes Queued: >>> 3001, 12004KiB >>> Read Dispatches: 166, 664KiB Write Dispatches: >>> 3001, 12004KiB >>> Reads Requeued: 0 Writes Requeued: 0 >>> Reads Completed: 166, 664KiB Writes Completed: >>> 3001, 1500KiB >>> Read Merges: 0, 0KiB Write Merges: >>> 0, 0KiB >>> PC Reads Queued: 0, 0KiB PC Writes Queued: >>> 0, 0KiB >>> PC Read Disp.: 22, 3KiB PC Write Disp.: >>> 0, 0KiB >>> PC Reads Req.: 0 PC Writes Req.: 0 >>> PC Reads Compl.: 10 PC Writes Compl.: 0 >>> IO unplugs: 166 Timer unplugs: 0 >> >> That looks fine, it might just be coincidence that you are capped at >> ~100 IOPS. I don't think it's that unlikely that the this is the limit >> for you, your device might have a fixed overhead associated with a trim >> request. I'd have to look closer at your system to see if that's the >> case or not. >> >> -- >> Jens Axboe >> > > Sorry, I'm kind of new to mailing lists. I'll test some different > drive / system configurations next. Thanks for your help! I think that would be useful, will certainly help in pin pointing what the limiting component is here. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
