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] [  5922/ 13369 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 13170/  7805 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 16261/  2993 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 10654/  9423 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 12194/  6337 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [  9318/  7382 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 11203/  6590 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 11055/  4100 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  9423/  6924 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  7687/  6963 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8879/  4710 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  9038/  2627 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9664/  2700 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8968/  1732 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  8257/  2940 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5580/  2985 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3205/  4014 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22172, got signal=6
Threads: 2: [m_m] [64.5% done] [  6760/  1932 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22171, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22173, got signal=6

fio: (groupid=0): err= 0: pid=22171
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.3%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=3.0%, 50=6.6%, 100=44.1%
     lat (msec): 250=44.9%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22172
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=5.6%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.4%, 20=1.3%, 50=10.2%, 100=43.6%
     lat (msec): 250=43.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22173
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=13.0%, 100=41.4%
     lat (msec): 250=43.3%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3750/2211, merge=665/154, ticks=43840/35684, in_queue=79524, util=99.99%
0.30user 0.52system 0:21.76elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
396624inputs+217680outputs (0major+2460minor)pagefaults 0swaps