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] [13.6% done] [ 15017/  5686 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 18059/  3339 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  9268/  9492 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  9172/ 10120 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 16221/  3241 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  3189/ 13572 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 16656/  1191 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  8866/  6952 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  4759/ 10038 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  7663/  5287 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 10315/  3136 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7240/  4746 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8358/  2847 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  9164/  2859 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6940/  3291 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6044/  2570 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5396/  2673 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22590, got signal=6
Threads: 2: [m_m] [64.5% done] [  4714/  2688 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22591, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22589, got signal=6

fio: (groupid=0): err= 0: pid=22589
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.2%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.8%, 50=9.3%, 100=45.1%
     lat (msec): 250=40.9%, 500=1.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22590
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.7%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=8.9%, 100=48.0%
     lat (msec): 250=40.7%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22591
  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=0.1%, 20=1.4%, 50=6.8%, 100=47.5%
     lat (msec): 250=42.8%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3661/2230, merge=639/187, ticks=44040/34656, in_queue=78692, util=99.16%
0.34user 0.54system 0:21.53elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
390184inputs+223816outputs (0major+2453minor)pagefaults 0swaps