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] [11.5% done] [ 16579/  2750 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [14.8% done] [ 14069/  4673 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [18.5% done] [ 17009/  2238 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [23.1% done] [ 14639/  5474 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.9% done] [ 10233/  6853 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [28.6% done] [ 14665/  3498 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [32.1% done] [ 10848/  5100 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [35.7% done] [  5871/  8769 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [37.9% done] [  9196/  5474 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [41.4% done] [ 10412/  3481 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [43.3% done] [  8866/  6018 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [46.7% done] [ 12731/  1265 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [50.0% done] [  6386/  6377 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.6% done] [  7082/  3120 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [54.8% done] [  8619/  1879 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [56.2% done] [  5222/  4205 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [57.6% done] [  3803/  4026 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17303, got signal=6
Threads: 2: [m_m] [58.8% done] [  6066/  1214 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17304, got signal=6
Threads: 1: [m__] [63.6% done] [  3559/  3522 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17302, got signal=6

fio: (groupid=0): err= 0: pid=17302
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.7%, 8=92.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.6%, 20=3.1%, 50=19.5%, 100=21.0%
     lat (msec): 250=53.8%, 500=1.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17303
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=9.5%, 100=45.1%
     lat (msec): 250=43.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17304
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.1%, 50=9.0%, 100=48.5%
     lat (msec): 250=40.0%, 500=0.7%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3990/2041, merge=627/406, ticks=50172/32320, in_queue=82480, util=99.06%
0.18user 0.35system 0:22.48elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
423416inputs+190352outputs (0major+2453minor)pagefaults 0swaps