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] [14.3% done] [  7623/ 13722 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [  6829/ 13833 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 10913/  9233 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 18503/  1248 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [  5503/ 11568 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [  9391/  8379 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 15823/  1170 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [  8497/  7341 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  6438/  6491 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 12955/  3022 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  7350/  3921 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7842/  4132 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  4612/  6097 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8293/  2277 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7345/  3489 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7891/  1472 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6703/  1976 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22002, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22004, got signal=6
Threads: 1: [_m_] [64.5% done] [  7585/   768 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22003, got signal=6

fio: (groupid=0): err= 0: pid=22002
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.8%, 50=7.0%, 100=43.2%
     lat (msec): 250=46.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22003
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.4%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=2.1%, 50=11.9%, 100=37.9%
     lat (msec): 250=46.2%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22004
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.7%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=1.8%, 50=7.1%, 100=45.7%
     lat (msec): 250=44.0%, 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=3561/2346, merge=501/200, ticks=42680/37856, in_queue=80536, util=98.14%
0.38user 0.50system 0:21.50elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
362264inputs+251856outputs (0major+2453minor)pagefaults 0swaps