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] [8.1% done] [ 10852/  7968 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [12.5% done] [ 16887/  3661 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [17.2% done] [ 15055/  5936 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [21.4% done] [  6564/ 13386 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [25.0% done] [ 15358/  4193 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [29.6% done] [ 17299/  1301 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [33.3% done] [ 10154/  6404 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [37.0% done] [ 10620/  7516 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [40.7% done] [  6773/  8407 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.9% done] [  2681/ 12023 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [46.4% done] [ 10229/  4799 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [ 10128/  3258 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [ 10670/  1885 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  9103/  2477 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [ 10268/  1072 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  7496/  2558 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [   776/  6863 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13167, got signal=6
Threads: 2: [_mm] [62.5% done] [  4096/  3172 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13169, got signal=6
Threads: 1: [_m_] [65.6% done] [  2961/  3376 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13168, got signal=6

fio: (groupid=0): err= 0: pid=13167
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.2%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.3%, 50=8.4%, 100=51.8%
     lat (msec): 250=36.8%, 500=1.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13168
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.2%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.5%, 50=11.8%, 100=36.5%
     lat (msec): 250=46.9%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.5%
fio: (groupid=0): err= 0: pid=13169
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.4%, 8=95.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=8.9%, 100=50.9%
     lat (msec): 250=38.3%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3659/2657, merge=725/2368, ticks=45840/184584, in_queue=221748, util=99.87%
0.17user 0.47system 0:22.11elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
389224inputs+225008outputs (0major+2458minor)pagefaults 0swaps