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] [12.5% done] [ 16579/  5221 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [  9638/ 10500 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 20581/  1765 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [26.1% done] [ 18383/  1385 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 10282/  8318 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 10762/  7622 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 13666/  4726 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  8834/  7585 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 10046/  4348 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [ 15529/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 13996/   695 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  8187/  4047 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  4295/  5527 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  4596/  5247 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  8635/  1492 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  8212/   857 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19033, got signal=6
Threads: 2: [mm_] [61.3% done] [   874/  5698 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19032, got signal=6
Threads: 1: [m__] [64.5% done] [  3396/  3518 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19031, got signal=6

fio: (groupid=0): err= 0: pid=19031
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.0%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.4%, 20=1.6%, 50=14.2%, 100=42.2%
     lat (msec): 250=40.0%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19032
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.7%, 50=9.0%, 100=52.2%
     lat (msec): 250=37.0%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19033
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.3%, 50=7.7%, 100=62.1%
     lat (msec): 250=29.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3852/1876, merge=611/87, ticks=45440/24828, in_queue=70264, util=98.13%
0.20user 0.44system 0:21.28elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
440048inputs+174200outputs (0major+2457minor)pagefaults 0swaps