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=8851, got signal=6
Threads: 2
Threads: 2: [_Fm] [60.0% done] [  1405/ 26416 kb/s] [eta 00m:02s]
Threads: 2: [_Fm] [57.1% done] [  1247/     0 kb/s] [eta 00m:03s]
Threads: 2: [_Fm] [55.6% done] [  1247/     0 kb/s] [eta 00m:04s]
Threads: 2: [_FF] [100.0% done] [   162/ 22865 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [68.4% done] [ 54968/     0 kb/s] [eta 00m:06s]
Threads: 1: [__V] [87.5% done] [ 72659/     0 kb/s] [eta 00m:02s]
fio: (groupid=0): err= 0: pid=8851
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=93.7%, 4=6.0%, 8=0.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=84.4%, 4=12.8%, 10=2.4%, 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=8852
  read : io=100MiB, bw=7,456KiB/s, runt= 14063msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  490, avg= 7.94, stdev=35.99
    bw (KiB/s) : min=    3, max=75243, per=266.52%, avg=37289.40, stdev=34972.42
  write: io=99MiB, bw=8,573KiB/s, runt= 12064msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   86, avg= 0.82, stdev= 4.10
    bw (KiB/s) : min=    0, max=63397, per=185.38%, avg=41664.00, stdev=36093.33
  cpu          : usr=13.28%, sys=4.64%, ctx=4985
  IO depths    : 1=4.2%, 2=65.2%, 4=24.5%, 8=6.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=54.9%, 4=27.7%, 10=14.3%, 20=0.6%, 50=0.4%, 100=1.0%
     lat (msec): 250=0.7%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8853
  read : io=100MiB, bw=6,995KiB/s, runt= 14989msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  525, avg=27.89, stdev=68.94
    bw (KiB/s) : min=    3, max=65699, per=77.82%, avg=10888.43, stdev=18658.17
  write: io=77,940KiB, bw=6,229KiB/s, runt= 12812msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  255, avg= 1.93, stdev=15.72
    bw (KiB/s) : min=    0, max=13187, per=32.28%, avg=7256.00, stdev=6692.60
  cpu          : usr=9.63%, sys=4.94%, ctx=5443
  IO depths    : 1=3.0%, 2=57.0%, 4=24.4%, 8=15.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=52.9%, 4=14.1%, 10=18.4%, 20=2.7%, 50=3.5%, 100=4.1%
     lat (msec): 250=1.9%, 500=2.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=13,991KiB/s, minb=0KiB/s, maxb=7,456KiB/s, mint=14063msec, maxt=14989msec
  WRITE: io=275MiB, aggrb=22,475KiB/s, minb=0KiB/s, maxb=8,573KiB/s, mint=14063msec, maxt=14989msec

Disk stats (read/write):
  cciss!c0d0: ios=1872/3853, merge=23430/66389, ticks=115764/1475944, in_queue=1591976, util=97.89%
4.65user 1.80system 0:15.31elapsed 42%CPU (0avgtext+0avgdata 0maxresident)k
459928inputs+562448outputs (0major+2453minor)pagefaults 0swaps