fio version: fio-2.21-37-ga2c9 fio file excerpt: [global] ioengine=sg invalidate=1 ramp_time=5 iodepth=16 runtime=300 time_based bs=64k norandommap loops=5 [seq_read-2-jobs] rw=read numjobs=2 stonewall [randread] rw=randread [seq_write] rw=write stonewall ... In the report, I see jobs with groupid 0 which are not supposed to be on same group: ...,jobname,groupid,... ...,seq_read-2-jobs,0,... ...,seq_read-2-jobs,0,... ...,randread,0,... ...,seq_write,1,... thanks, Ido Ben-Tsion -- 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