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
Threads: 3: [mmm] [11.5% done] [ 12430/  6878 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [14.8% done] [  5344/ 12035 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [17.9% done] [ 12678/  3481 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [22.2% done] [ 15794/  3249 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [25.9% done] [ 17315/  1142 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [29.6% done] [  8859/  7598 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [32.1% done] [  4567/ 10921 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [35.7% done] [  8517/  6772 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [39.3% done] [ 13520/  1114 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [42.9% done] [ 16697/   362 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.8% done] [  8651/  4506 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [48.3% done] [  4502/  7809 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  4880/  6022 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [53.3% done] [  7549/  3607 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [54.8% done] [  7390/  2147 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [58.1% done] [  8383/  1110 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [59.4% done] [  7590/  1606 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15004, got signal=6
Threads: 2: [m_m] [60.6% done] [  6796/  1029 kb/s] [eta 00m:13s]
Threads: 2: [m_m] [61.8% done] [  5535/  2485 kb/s] [eta 00m:13s]
Threads: 2: [m_V] [62.9% done] [  9241/  2765 kb/s] [eta 00m:13s]
Threads: 2: [m_V] [63.9% done] [ 18381/     0 kb/s] [eta 00m:13s]
Threads: 1: [m__] [66.7% done] [  8257/  2558 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15003, got signal=6

fio: (groupid=0): err= 0: pid=15003
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=4.5%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.2%, 10=0.1%, 20=1.3%, 50=11.5%, 100=36.1%
     lat (msec): 250=46.9%, 500=2.9%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15004
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.9%, 50=9.2%, 100=43.7%
     lat (msec): 250=43.8%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15005
  read : io=100MiB, bw=4,473KiB/s, runt= 23380msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  311, avg=70.10, stdev=42.16
    bw (KiB/s) : min=  892, max=21457, per=51.63%, avg=5391.10, stdev=4528.96
  write: io=31,908KiB, bw=1,512KiB/s, runt= 21607msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   35, max=  551, avg=127.68, stdev=63.60
    bw (KiB/s) : min=    0, max= 6737, per=51.26%, avg=2438.64, stdev=2340.53
  cpu          : usr=0.67%, sys=0.27%, ctx=7922
  IO depths    : 1=0.1%, 2=0.6%, 4=13.2%, 8=86.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.2%, 10=2.9%, 20=8.2%, 50=15.3%, 100=39.0%
     lat (msec): 250=33.1%, 500=0.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=233MiB, aggrb=10,442KiB/s, minb=0KiB/s, maxb=4,473KiB/s, mint=23380msec, maxt=23380msec
  WRITE: io=98MiB, aggrb=4,757KiB/s, minb=0KiB/s, maxb=1,512KiB/s, mint=23380msec, maxt=23380msec

Disk stats (read/write):
  cciss!c0d0: ios=4474/1866, merge=720/392, ticks=49368/32684, in_queue=82052, util=99.35%
0.40user 0.49system 0:24.75elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
477176inputs+200792outputs (0major+2460minor)pagefaults 0swaps