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] [13.0% done] [ 13084/  5831 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 17779/  3046 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  6922/ 12161 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  9029/  9195 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 15619/  3310 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 11063/  7130 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 14846/  3526 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 13357/  2163 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 12015/  4762 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  8496/  4969 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9150/  5107 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  7968/  3022 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  7406/  3782 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  7797/  3262 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  4608/  4954 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8741/   479 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2944, got signal=6
Threads: 2: [_mm] [63.3% done] [  6573/   447 kb/s] [eta 00m:11s]
Threads: 2: [_mm] [64.5% done] [  3274/  3713 kb/s] [eta 00m:11s]
Threads: 2: [_mV] [63.6% done] [ 16924/     0 kb/s] [eta 00m:12s]
Threads: 1: [_m_] [66.7% done] [ 13929/   861 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2945, got signal=6

fio: (groupid=0): err= 0: pid=2944
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.3%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=1.0%, 50=9.0%, 100=55.1%
     lat (msec): 250=34.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2945
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=12.0%, 100=37.8%
     lat (msec): 250=47.1%, 500=1.4%, 750=0.9%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2946
  read : io=100MiB, bw=4,770KiB/s, runt= 21948msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  547, avg=73.11, stdev=53.83
    bw (KiB/s) : min=  153, max=20544, per=45.58%, avg=5206.70, stdev=4178.42
  write: io=28,204KiB, bw=1,419KiB/s, runt= 20339msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   19, max=  216, avg=88.70, stdev=37.19
    bw (KiB/s) : min=    0, max= 6889, per=58.78%, avg=2669.89, stdev=2346.67
  cpu          : usr=0.26%, sys=0.44%, ctx=7598
  IO depths    : 1=0.1%, 2=0.6%, 4=16.6%, 8=82.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.7%, 10=5.5%, 20=9.7%, 50=14.7%, 100=38.9%
     lat (msec): 250=29.6%, 500=0.2%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=239MiB, aggrb=11,423KiB/s, minb=0KiB/s, maxb=4,770KiB/s, mint=21948msec, maxt=21948msec
  WRITE: io=90,224KiB, aggrb=4,542KiB/s, minb=0KiB/s, maxb=1,419KiB/s, mint=21948msec, maxt=21948msec

Disk stats (read/write):
  cciss!c0d0: ios=4686/2071, merge=793/95, ticks=54004/29528, in_queue=83524, util=98.33%
0.25user 0.75system 0:23.52elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
489920inputs+180512outputs (0major+2451minor)pagefaults 0swaps