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] [ 14978/  5794 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [15.4% done] [ 11096/  7370 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [20.0% done] [ 10089/  9992 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 11437/  7858 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [28.0% done] [  5060/ 12471 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 15424/  3131 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 14120/  2913 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  7463/  9090 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 11608/  2810 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  5141/  9607 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 10579/  4514 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 10921/  1025 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  3689/  7431 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  3217/  6646 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  5096/  4909 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  4734/  4661 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5275/  3888 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.5% done] [  5436/  2470 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32630, got signal=6
Threads: 2: [mm_] [63.6% done] [  2985/  3709 kb/s] [eta 00m:12s]
Threads: 2: [mV_] [64.7% done] [ 24803/   166 kb/s] [eta 00m:12s]
Threads: 1: [mE_] [65.7% done] [ 22196/    89 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32628, got signal=6

fio: (groupid=0): err= 0: pid=32628
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.1%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.2%, 20=1.8%, 50=8.5%, 100=33.3%
     lat (msec): 250=52.5%, 500=2.2%, 750=0.5%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32629
  read : io=100MiB, bw=4,531KiB/s, runt= 23045msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  395, avg=60.86, stdev=50.74
    bw (KiB/s) : min=  103, max=28794, per=60.17%, avg=6038.93, stdev=7065.97
  write: io=44,576KiB, bw=2,159KiB/s, runt= 21139msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    9, max=  375, avg=110.55, stdev=39.13
    bw (KiB/s) : min=    0, max= 7380, per=51.18%, avg=3105.19, stdev=2365.82
  cpu          : usr=0.52%, sys=0.54%, ctx=8028
  IO depths    : 1=0.1%, 2=1.5%, 4=19.3%, 8=79.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.7%, 10=8.9%, 20=9.4%, 50=16.3%, 100=31.8%
     lat (msec): 250=31.5%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32630
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.6%, 8=96.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=7.6%, 100=47.2%
     lat (msec): 250=44.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=221MiB, aggrb=10,037KiB/s, minb=0KiB/s, maxb=4,531KiB/s, mint=0msec, maxt=23045msec
  WRITE: io=122MiB, aggrb=6,067KiB/s, minb=0KiB/s, maxb=2,159KiB/s, mint=0msec, maxt=23045msec

Disk stats (read/write):
  cciss!c0d0: ios=4290/2691, merge=552/93, ticks=45744/44868, in_queue=90604, util=99.03%
0.28user 0.36system 0:23.94elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
451832inputs+250840outputs (0major+2462minor)pagefaults 0swaps