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] [9.7% done] [  7468/ 10678 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [14.3% done] [ 11507/ 10107 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [18.5% done] [ 15839/  3661 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [23.1% done] [ 10250/  7695 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [28.0% done] [ 17107/  2974 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.8% done] [ 13764/  4230 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [33.3% done] [  8594/  7228 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [37.0% done] [  8842/  8573 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [40.7% done] [  7585/  7463 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [ 11612/  2468 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.4% done] [ 11718/  1948 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  7040/  6626 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  9009/  4624 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  7345/  4661 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  6814/  3791 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [60.0% done] [  7431/  1980 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  4356/  3990 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20311, got signal=6
Threads: 2: [m_m] [62.5% done] [  6408/  1019 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20312, got signal=6
Threads: 1: [m__] [63.6% done] [  6516/  1232 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20310, got signal=6

fio: (groupid=0): err= 0: pid=20310
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.0%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.5%, 50=14.6%, 100=41.1%
     lat (msec): 250=36.7%, 500=4.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20311
  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=0.0%, 20=1.8%, 50=10.3%, 100=47.9%
     lat (msec): 250=35.6%, 500=3.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20312
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.4%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.4%, 10=0.2%, 20=1.2%, 50=8.2%, 100=47.8%
     lat (msec): 250=37.4%, 500=4.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3867/2146, merge=536/267, ticks=48924/33088, in_queue=82012, util=98.94%
0.22user 0.32system 0:22.29elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
397168inputs+217032outputs (0major+2464minor)pagefaults 0swaps