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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30294, got signal=6
Threads: 2: [_mm] [21.4% done] [ 22775/ 16026 kb/s] [eta 00m:11s]
Threads: 2: [_mm] [44.4% done] [ 16306/ 54134 kb/s] [eta 00m:05s]
Threads: 2: [_mm] [50.0% done] [ 10593/ 24547 kb/s] [eta 00m:05s]
Threads: 2: [_Fm] [66.7% done] [  1556/ 31215 kb/s] [eta 00m:03s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30296, got signal=6
Threads: 1: [_F_] [100.0% done] [   308/  5989 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_] [70.0% done] [  1962/     0 kb/s] [eta 00m:06s]
Threads: 1: [_V_] [100.0% done] [ 48810/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=30294
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=92.6%, 4=2.2%, 8=5.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=74.9%, 4=17.7%, 10=1.3%, 20=0.2%, 50=0.3%, 100=2.1%
     lat (msec): 250=3.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30295
  read : io=100MiB, bw=6,848KiB/s, runt= 15310msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  354, avg=27.17, stdev=40.67
    bw (KiB/s) : min=   25, max=50086, per=137.17%, avg=14200.15, stdev=15240.43
  write: io=57,384KiB, bw=4,199KiB/s, runt= 13992msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  158, avg= 1.18, stdev= 7.35
    bw (KiB/s) : min=    0, max=59031, per=155.44%, avg=23862.67, stdev=31097.08
  cpu          : usr=8.23%, sys=4.28%, ctx=5674
  IO depths    : 1=1.2%, 2=51.1%, 4=23.8%, 8=23.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=42.8%, 4=11.5%, 10=19.5%, 20=8.0%, 50=5.0%, 100=9.6%
     lat (msec): 250=3.2%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30296
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=69.3%, 4=3.4%, 8=27.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=62.3%, 4=7.5%, 10=0.7%, 20=0.3%, 50=4.6%, 100=17.8%
     lat (msec): 250=5.4%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=151MiB, aggrb=10,352KiB/s, minb=0KiB/s, maxb=6,848KiB/s, mint=0msec, maxt=15310msec
  WRITE: io=205MiB, aggrb=15,352KiB/s, minb=0KiB/s, maxb=4,199KiB/s, mint=0msec, maxt=15310msec

Disk stats (read/write):
  cciss!c0d0: ios=1831/3338, merge=12476/48916, ticks=40008/1329136, in_queue=1370704, util=97.68%
4.11user 1.46system 0:15.63elapsed 35%CPU (0avgtext+0avgdata 0maxresident)k
394568inputs+419608outputs (0major+2455minor)pagefaults 0swaps