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=4846, got signal=6
Threads: 2
Threads: 2: [_mm] [42.9% done] [ 15258/ 28188 kb/s] [eta 00m:04s]
Threads: 2: [_FF] [100.0% done] [   243/ 59371 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: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4848, got signal=6
Threads: 1: [_V_] [86.7% done] [ 24860/     0 kb/s] [eta 00m:02s]
fio: (groupid=0): err= 0: pid=4846
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=94.4%, 4=4.6%, 8=0.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=84.2%, 4=13.0%, 10=2.5%, 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=4847
  read : io=100MiB, bw=7,553KiB/s, runt= 13882msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  102, avg=14.92, stdev=23.54
    bw (KiB/s) : min=   13, max=56582, per=234.88%, avg=22383.62, stdev=20829.71
  write: io=67,736KiB, bw=5,527KiB/s, runt= 12548msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   50, avg= 0.63, stdev= 2.23
    bw (KiB/s) : min=    0, max=61480, per=199.72%, avg=40039.33, stdev=34704.18
  cpu          : usr=9.94%, sys=4.73%, ctx=5108
  IO depths    : 1=1.8%, 2=56.0%, 4=26.0%, 8=16.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.6%, 4=15.2%, 10=22.1%, 20=3.4%, 50=3.2%, 100=7.4%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4848
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=75.1%, 4=7.5%, 8=17.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=77.5%, 4=1.8%, 10=0.3%, 20=0.5%, 50=7.1%, 100=11.2%
     lat (msec): 250=1.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=126MiB, aggrb=9,530KiB/s, minb=0KiB/s, maxb=7,553KiB/s, mint=0msec, maxt=13882msec
  WRITE: io=240MiB, aggrb=20,048KiB/s, minb=0KiB/s, maxb=5,527KiB/s, mint=0msec, maxt=13882msec

Disk stats (read/write):
  cciss!c0d0: ios=1161/3207, merge=3166/58137, ticks=30424/1384852, in_queue=1416160, util=94.80%
3.54user 1.58system 0:14.23elapsed 36%CPU (0avgtext+0avgdata 0maxresident)k
327656inputs+491480outputs (0major+2463minor)pagefaults 0swaps