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? ________________________________ PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies). ��.n��������+%������w��{.n�������^n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�