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=11721, got signal=6
Threads: 2
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11719, got signal=6
Threads: 1: [_F_] [100.0% done] [     0/ 44010 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: [_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_] [100.0% done] [ 44275/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=11719
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=17.9%, 2=77.9%, 4=0.9%, 8=3.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=86.7%, 4=8.6%, 10=0.8%, 20=0.1%, 50=0.4%, 100=3.2%
     lat (msec): 250=0.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11720
  read : io=100MiB, bw=7,086KiB/s, runt= 14794msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  110, avg=10.16, stdev=21.27
    bw (KiB/s) : min=    4, max=60080, per=350.70%, avg=26285.17, stdev=26472.44
  write: io=82,708KiB, bw=6,360KiB/s, runt= 13315msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   67, avg= 0.35, stdev= 2.95
    bw (KiB/s) : min=    0, max=115900, per=267.75%, avg=57950.00, stdev=81953.68
  cpu          : usr=7.60%, sys=4.33%, ctx=5631
  IO depths    : 1=3.4%, 2=62.7%, 4=23.5%, 8=10.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=57.7%, 4=15.0%, 10=19.8%, 20=1.7%, 50=0.8%, 100=4.5%
     lat (msec): 250=0.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11721
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=90.6%, 4=9.2%, 8=0.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=88.0%, 4=8.9%, 10=2.3%, 20=0.3%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=106MiB, aggrb=7,495KiB/s, minb=0KiB/s, maxb=7,086KiB/s, mint=0msec, maxt=14794msec
  WRITE: io=275MiB, aggrb=21,643KiB/s, minb=0KiB/s, maxb=6,360KiB/s, mint=0msec, maxt=14794msec

Disk stats (read/write):
  cciss!c0d0: ios=1223/4053, merge=5206/66057, ticks=43636/1534580, in_queue=1581768, util=92.03%
3.89user 1.54system 0:15.12elapsed 35%CPU (0avgtext+0avgdata 0maxresident)k
255520inputs+563200outputs (0major+2472minor)pagefaults 0swaps