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=27919, got signal=6
Threads: 2
Threads: 2: [_mm] [33.3% done] [ 17689/     0 kb/s] [eta 00m:06s]
Threads: 2: [_mm] [57.1% done] [  6309/ 75381 kb/s] [eta 00m:03s]
Threads: 2: [_mF] [71.4% done] [  2936/ 20191 kb/s] [eta 00m:02s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27920, got signal=6
Threads: 1: [__F] [100.0% done] [    69/  1041 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] [83.3% done] [ 21339/     0 kb/s] [eta 00m:03s]
Threads: 1: [__V] [100.0% done] [ 55338/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=27919
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=98.8%, 4=1.1%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=86.2%, 4=12.3%, 10=1.3%, 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=27920
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=4.9%, 2=48.3%, 4=24.5%, 8=22.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=33.6%, 4=15.5%, 10=26.6%, 20=3.8%, 50=3.5%, 100=10.6%
     lat (msec): 250=6.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27921
  read : io=100MiB, bw=6,450KiB/s, runt= 16239msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  175, avg=17.70, stdev=31.68
    bw (KiB/s) : min=    6, max=63459, per=198.38%, avg=16467.90, stdev=23145.50
  write: io=76,708KiB, bw=5,309KiB/s, runt= 14794msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   78, avg= 2.41, stdev= 5.52
    bw (KiB/s) : min=    0, max=58018, per=141.84%, avg=24742.67, stdev=29935.38
  cpu          : usr=9.14%, sys=4.58%, ctx=5816
  IO depths    : 1=2.9%, 2=48.6%, 4=32.1%, 8=16.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=36.1%, 4=14.0%, 10=31.3%, 20=9.1%, 50=1.9%, 100=4.8%
     lat (msec): 250=2.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=129MiB, aggrb=8,301KiB/s, minb=0KiB/s, maxb=6,450KiB/s, mint=16239msec, maxt=16239msec
  WRITE: io=246MiB, aggrb=17,444KiB/s, minb=0KiB/s, maxb=5,309KiB/s, mint=16239msec, maxt=16239msec

Disk stats (read/write):
  cciss!c0d0: ios=2805/3811, merge=637/58965, ticks=18128/1488836, in_queue=1506124, util=89.97%
3.70user 1.34system 0:16.58elapsed 30%CPU (0avgtext+0avgdata 0maxresident)k
342536inputs+504184outputs (0major+2476minor)pagefaults 0swaps