Ah, I think it was an issue with the version of FIO I was using. Running 2.1.4 did not replay the blktrace properly and would ignore the idle time between jobs. I pulled 2.2.7 and it seems to be working as expected, accurately including the idle time. Regards, Brandon On Wed, Apr 22, 2015 at 4:51 PM, Jens Axboe <axboe@xxxxxxxxx> wrote: > On 04/22/2015 02:53 PM, Brandon Schwartz wrote: >> >> And by blkreplay, I meant replay the blktrace with FIO >> >> On Wed, Apr 22, 2015 at 2:52 PM, Brandon Schwartz <schwartz.xn@xxxxxxxxx> >> wrote: >>> >>> Is there an accurate way to capture idle time with blktrace? For >>> example, if I run/trace the following FIO script: >>> >>> [global] >>> direct=1 >>> ioengine=libaio >>> readwrite=read >>> blocksize=512k >>> filename=/dev/sdd >>> >>> [read] >>> runtime=10 >>> name=read >>> >>> [read2] >>> stonewall=1 >>> startdelay=40 >>> runtime=10 >>> name=read2 >>> >>> And attempt to replay it using blkreplay, it will ignore the wait time >>> and simply read for 20seconds instead of read 10s, wait for 40s, read >>> 10s. > > > > replay_no_stall=1 > > -- > Jens Axboe > -- To unsubscribe from this list: send the line "unsubscribe linux-btrace" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
