This worked! I am in your debt, it is extremely cool to have this operational now. Please let me know if there is anything I may do to help test or validate this fix or otherwise repay the favor! On Tue, Oct 27, 2015 at 8:30 PM, Jens Axboe <axboe@xxxxxxxxx> wrote: > On 10/28/2015 09:20 AM, Jens Axboe wrote: >> >> On 10/28/2015 06:13 AM, Jens Axboe wrote: >>> >>> On 10/28/2015 12:41 AM, Buttetsu Batou wrote: >>>> >>>> On 06/04/2015 05:09 PM, Reed Crowe wrote: >>>>> >>>>> Using this version of FIO: >>>>> * io-threads >>>>> master >>>>> rcrowe@rcrowe-desktop:~/fio_iothreads/fio$ ./fio --version >>>>> fio-2.2.7-14-g00b2 >>>>> >>>>> I have a job file which looks like this: >>>>> >>>>> [global] >>>>> ioengine=libaio >>>>> direct=1 >>>>> numjobs=1 >>>>> bs=4k >>>>> iodepth=300 >>>>> rw=randwrite >>>>> randrepeat=0 >>>>> io_submit_mode=offload >>>>> rate_iops=8070 >>>>> time_based=1 >>>>> runtime=1m >>>>> >>>>> [slow_write] >>>>> filename=/mnt/test1/testfile.io >>>>> write_lat_log=/tmp/fio_lat >>>>> >>>>> And it produces empty files: >>>>> -rw-r--r-- 1 root root 0 Jun 4 14:34 fio_lat_clat.1.log >>>>> -rw-r--r-- 1 root root 0 Jun 4 14:34 fio_lat_lat.1.log >>>>> -rw-r--r-- 1 root root 0 Jun 4 14:34 fio_lat_slat.1.log >>>>> >>>>> What am I missing? >>>> >>>> >>>> I am seeing this behavior in the latest release fio-2.2.10 and in >>>> master fio-2.2.10-29-g8a68 but I am not using offload. >>>> >>>> Is anyone currently able to successfully generate log output? If so >>>> could you share your fio version and your config? >>>> >>>> Here is the job file I am using at the moment.. have tried variations >>>> on these settings and different fio versions back to 2.0.15 but always >>>> the same empty output: >>>> >>>> [write] >>>> group_reporting=1 >>>> numjobs=8 >>>> ioengine=posixaio >>>> io_submit_mode=inline >>>> stonewall >>>> rw=write >>>> bs=32k >>>> time_based=1 >>>> runtime=10 >>>> filesize=64k >>>> directory=/tmp >>>> per_job_logs=1 >>>> write_bw_log=write_bw >>>> write_iops_log=write_iops >>>> >>>> Updated the issue reported here: >>>> >>>> https://github.com/axboe/fio/issues/29 >>>> >>>> Thank you for any ideas you may have! >>> >>> >>> I think your issue is because you set filesize=64k. Your job basically >>> sets up 8 files of 64k each, then writes to them for 10 seconds. This >>> means that the fio main loop keeps re-entering for every 64k for each >>> thread. The bandwidth/iops is averaged over a window of 500msec by >>> default, and the main loop runs for much shorter than that since it only >>> does 64k each time. Hence you never get logged any entries. >>> >>> Now, it should work. If you comment out these two lines: >>> >>> memcpy(&td->bw_sample_time, &td->start, sizeof(td->start)); >>> memcpy(&td->iops_sample_time, &td->start, sizeof(td->start)); >>> >>> in backend.c around 1568/1569, then I suspect the logging should improve >>> for you. I'll have to see if we can safely do that without making other >>> changes, before committing a change like that.t >> >> >> Try the attached patch, we need to retain the stat block and byte counts >> too. > > > Just run current -git, I committed a similar patch. > > -- > 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
