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 -- 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
