fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
...
fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
Starting 3 threads
Threads: 3
Threads: 3
Threads: 3: [mmm] [9.7% done] [ 12401/  8931 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [13.8% done] [ 12357/  8448 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [17.9% done] [ 16693/  3432 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [21.4% done] [ 17108/   992 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [25.9% done] [ 16278/  2612 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [29.6% done] [ 11828/  6621 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [33.3% done] [ 10713/  8110 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [37.0% done] [ 15094/  2285 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [40.7% done] [  7724/  7882 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [  9841/  3705 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.4% done] [  7545/  6794 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  7968/  4311 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  9208/  2167 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  4022/  5741 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  8000/  2460 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  4957/  3673 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  5816/  2082 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5701, got signal=6
Threads: 2: [_mm] [62.5% done] [  3266/  4307 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5703, got signal=6
Threads: 1: [_m_] [65.6% done] [  8415/   284 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5702, got signal=6

fio: (groupid=0): err= 0: pid=5701
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=9.3%, 100=55.3%
     lat (msec): 250=34.5%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5702
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.3%, 8=92.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=3.9%, 50=14.4%, 100=29.2%
     lat (msec): 250=50.0%, 500=0.9%, 750=0.2%, 1000=0.1%, >=2000=0.4%
fio: (groupid=0): err= 0: pid=5703
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.6%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=0.9%, 50=8.1%, 100=44.9%
     lat (msec): 250=44.8%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3889/2339, merge=772/963, ticks=47592/135608, in_queue=171404, util=99.87%
0.14user 0.46system 0:21.87elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
414944inputs+199368outputs (0major+2452minor)pagefaults 0swaps