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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3809, got signal=6
Threads: 2
Threads: 2: [_mF] [60.0% done] [  6902/ 85450 kb/s] [eta 00m:02s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [_FF] [100.0% done] [     0/ 23892 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
fio: pid=3810, got signal=6
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [68.4% done] [   130/     0 kb/s] [eta 00m:06s]
Threads: 1: [__V] [100.0% done] [ 64486/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=3809
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=84.4%, 4=14.4%, 8=0.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=77.3%, 4=18.6%, 10=3.9%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3810
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=5.0%, 2=82.1%, 4=2.4%, 8=10.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=77.3%, 4=10.6%, 10=0.7%, 20=0.1%, 50=0.2%, 100=7.7%
     lat (msec): 250=3.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3811
  read : io=100MiB, bw=7,216KiB/s, runt= 14530msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  143, avg=13.37, stdev=27.04
    bw (KiB/s) : min=   12, max=65552, per=234.81%, avg=20703.50, stdev=27193.93
  write: io=83,876KiB, bw=6,552KiB/s, runt= 13107msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   72, avg= 0.87, stdev= 3.24
    bw (KiB/s) : min=    0, max=38952, per=93.76%, avg=19476.00, stdev=27543.22
  cpu          : usr=7.38%, sys=6.77%, ctx=5545
  IO depths    : 1=1.6%, 2=52.6%, 4=32.9%, 8=12.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.4%, 4=15.4%, 10=25.8%, 20=2.8%, 50=3.0%, 100=2.5%
     lat (msec): 250=2.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=122MiB, aggrb=8,817KiB/s, minb=0KiB/s, maxb=7,216KiB/s, mint=14530msec, maxt=14530msec
  WRITE: io=260MiB, aggrb=20,772KiB/s, minb=0KiB/s, maxb=6,552KiB/s, mint=14530msec, maxt=14530msec

Disk stats (read/write):
  cciss!c0d0: ios=2574/3836, merge=521/62320, ticks=13496/1423992, in_queue=1440728, util=88.33%
3.82user 1.92system 0:15.72elapsed 36%CPU (0avgtext+0avgdata 0maxresident)k
319888inputs+531952outputs (0major+2469minor)pagefaults 0swaps