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=23563, got signal=6
Threads: 2
Threads: 2: [_Fm] [50.0% done] [  6064/ 60480 kb/s] [eta 00m:03s]
Threads: 2: [_Fm] [57.1% done] [  2416/  8676 kb/s] [eta 00m:03s]
Threads: 2: [_Fm] [71.4% done] [  1255/ 18253 kb/s] [eta 00m:02s]
Threads: 2: [_FF] [100.0% done] [   248/   728 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] [85.7% done] [ 63477/     0 kb/s] [eta 00m:02s]
Threads: 2: [_VV] [100.0% done] [ 65169/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=23563
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=95.3%, 4=1.9%, 8=2.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=83.9%, 4=11.2%, 10=1.8%, 20=0.0%, 50=0.3%, 100=0.4%
     lat (msec): 250=2.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23564
  read : io=100MiB, bw=7,585KiB/s, runt= 13824msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  228, avg=12.54, stdev=30.12
    bw (KiB/s) : min=    3, max=48614, per=160.25%, avg=24747.38, stdev=19581.03
  write: io=98,676KiB, bw=9,169KiB/s, runt= 11019msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  119, avg= 0.81, stdev= 5.56
    bw (KiB/s) : min=    0, max=60990, per=148.33%, avg=36515.50, stdev=28519.00
  cpu          : usr=14.29%, sys=6.57%, ctx=9068
  IO depths    : 1=36.2%, 2=30.9%, 4=25.6%, 8=7.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=53.3%, 4=20.4%, 10=18.8%, 20=2.4%, 50=0.6%, 100=0.9%
     lat (msec): 250=3.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23565
  read : io=100MiB, bw=7,524KiB/s, runt= 13936msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  387, avg=31.73, stdev=54.96
    bw (KiB/s) : min=    4, max=37963, per=77.26%, avg=11931.56, stdev=11909.30
  write: io=70,024KiB, bw=6,488KiB/s, runt= 11051msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  183, avg= 1.34, stdev=11.18
    bw (KiB/s) : min=    0, max=33150, per=72.70%, avg=17896.33, stdev=16732.26
  cpu          : usr=6.97%, sys=4.85%, ctx=5983
  IO depths    : 1=1.0%, 2=51.4%, 4=30.2%, 8=17.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.5%, 4=9.6%, 10=22.7%, 20=4.9%, 50=1.7%, 100=6.5%
     lat (msec): 250=6.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=205MiB, aggrb=15,443KiB/s, minb=0KiB/s, maxb=7,585KiB/s, mint=13824msec, maxt=13936msec
  WRITE: io=259MiB, aggrb=24,617KiB/s, minb=0KiB/s, maxb=9,169KiB/s, mint=13824msec, maxt=13936msec

Disk stats (read/write):
  cciss!c0d0: ios=4129/3244, merge=899/63197, ticks=30168/1285644, in_queue=1315824, util=98.17%
4.16user 1.91system 0:14.27elapsed 42%CPU (0avgtext+0avgdata 0maxresident)k
513952inputs+531480outputs (0major+2446minor)pagefaults 0swaps