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] [ 10394/  9886 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 10727/ 10292 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.0% done] [  9654/  9004 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.0% done] [ 13874/  6479 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 11329/  7257 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 12849/  4913 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  8667/  7574 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  7111/  8541 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  3612/ 10268 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 13860/  3096 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6916/  6761 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 11320/  2539 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [ 12084/   987 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  9801/  1759 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [ 11398/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8121, got signal=6
Threads: 2: [m_m] [60.0% done] [  7476/   300 kb/s] [eta 00m:12s]
Threads: 2: [m_m] [63.3% done] [  9333/     0 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [66.7% done] [  3001/  4067 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8120, got signal=6
Threads: 1: [__m] [67.7% done] [   560/  4868 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8122, got signal=6

fio: (groupid=0): err= 0: pid=8120
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.6%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.2%, 10=0.1%, 20=0.5%, 50=11.3%, 100=44.1%
     lat (msec): 250=42.5%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8121
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.6%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.9%, 50=11.2%, 100=52.2%
     lat (msec): 250=33.9%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8122
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=11.4%, 100=43.6%
     lat (msec): 250=42.7%, 500=1.0%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3861/2224, merge=553/172, ticks=46760/35264, in_queue=82004, util=97.36%
0.17user 0.64system 0:21.68elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
394888inputs+219720outputs (0major+2457minor)pagefaults 0swaps