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] [ 17006/  2810 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 16457/  5918 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [  9652/ 10136 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  9904/  9306 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 14313/  3168 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 15326/  2001 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 14142/  2407 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 10957/  5857 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 10034/  5714 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 10038/  4262 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 13779/   804 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  4148/  7431 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  2403/  8065 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  7874/  2639 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  9160/   837 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  7053/  2290 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22744, got signal=6
Threads: 2: [mm_] [61.3% done] [  3123/  4039 kb/s] [eta 00m:12s]
Threads: 2: [mm_] [64.5% done] [  3030/  3624 kb/s] [eta 00m:11s]
Threads: 2: [mV_] [63.6% done] [ 11474/  1260 kb/s] [eta 00m:12s]
Threads: 2: [mV_] [64.7% done] [ 18324/   142 kb/s] [eta 00m:12s]
Threads: 1: [m__] [67.6% done] [  5084/  4242 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22742, got signal=6

fio: (groupid=0): err= 0: pid=22742
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=11.7%, 100=34.1%
     lat (msec): 250=51.2%, 500=1.5%, 750=0.5%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22743
  read : io=99MiB, bw=4,644KiB/s, runt= 22460msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  531, avg=68.05, stdev=51.10
    bw (KiB/s) : min=   35, max=19120, per=46.70%, avg=5118.41, stdev=3970.29
  write: io=31,580KiB, bw=1,559KiB/s, runt= 20739msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   27, max=  331, avg=89.11, stdev=33.00
    bw (KiB/s) : min=    0, max= 7311, per=63.33%, avg=3053.71, stdev=2397.69
  cpu          : usr=0.30%, sys=0.55%, ctx=7888
  IO depths    : 1=0.2%, 2=1.1%, 4=17.7%, 8=81.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=1.0%, 10=7.1%, 20=7.7%, 50=16.7%, 100=38.9%
     lat (msec): 250=27.7%, 500=0.3%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22744
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=9.1%, 100=50.7%
     lat (msec): 250=38.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=235MiB, aggrb=10,960KiB/s, minb=0KiB/s, maxb=4,644KiB/s, mint=0msec, maxt=22460msec
  WRITE: io=97,676KiB, aggrb=4,822KiB/s, minb=0KiB/s, maxb=1,559KiB/s, mint=0msec, maxt=22460msec

Disk stats (read/write):
  cciss!c0d0: ios=4496/2291, merge=676/169, ticks=51700/29852, in_queue=81544, util=99.18%
0.25user 0.35system 0:23.54elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
481016inputs+195472outputs (0major+2449minor)pagefaults 0swaps