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] [  8745/ 12963 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [  5186/ 15647 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [  8667/ 10412 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 13593/  5967 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [  8021/  9501 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [  4990/ 11136 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 11987/  5076 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  8696/  5535 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 12617/  3180 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  7130/  7195 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  5535/  7797 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6918/  7081 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  5226/  6089 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  6040/  5332 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [ 10201/   898 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [60.0% done] [  6381/  3180 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1515, got signal=6
Threads: 2: [m_m] [59.4% done] [  5623/  2267 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1514, got signal=6
Threads: 1: [__m] [62.5% done] [  2981/  3697 kb/s] [eta 00m:12s]
Threads: 1: [__m] [65.6% done] [  4295/  2822 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1516, got signal=6

fio: (groupid=0): err= 0: pid=1514
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.0%, 8=95.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=9.2%, 100=43.1%
     lat (msec): 250=45.8%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1515
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.2%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.2%, 10=0.1%, 20=1.7%, 50=7.8%, 100=55.8%
     lat (msec): 250=33.6%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1516
  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=0.1%, 20=3.1%, 50=18.5%, 100=21.1%
     lat (msec): 250=55.2%, 500=1.3%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3491/2655, merge=544/142, ticks=41868/41072, in_queue=82940, util=99.03%
0.18user 0.37system 0:21.82elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
361160inputs+253152outputs (0major+2464minor)pagefaults 0swaps