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] [13.0% done] [ 17578/  3685 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 16209/  6286 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  8082/ 10183 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  9406/  9886 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 18576/   829 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 13446/  3494 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [  6447/ 11063 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 10817/  4998 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 13569/  3502 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  7647/  4445 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  7606/  6546 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  4274/  8614 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  8179/  3835 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  3388/  7911 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5926/  2619 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4526/  5059 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5827/  2669 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21432, got signal=6
Threads: 2: [m_m] [64.5% done] [  4030/  3092 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21433, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21431, got signal=6

fio: (groupid=0): err= 0: pid=21431
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.9%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.2%, 20=2.2%, 50=9.5%, 100=37.2%
     lat (msec): 250=49.1%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21432
  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=1.9%, 50=9.1%, 100=46.3%
     lat (msec): 250=42.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21433
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.7%, 50=9.5%, 100=42.2%
     lat (msec): 250=46.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3502/2458, merge=557/222, ticks=41308/34976, in_queue=76284, util=98.94%
0.33user 0.34system 0:21.06elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
379000inputs+235280outputs (0major+2454minor)pagefaults 0swaps