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] [9.7% done] [  5076/ 14216 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [12.9% done] [  4896/ 13535 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [16.1% done] [ 13068/  4624 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [20.0% done] [ 11463/  2994 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [23.3% done] [  6825/  8883 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [27.6% done] [ 18869/  1671 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [31.0% done] [ 17087/     0 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [34.5% done] [ 11804/  5566 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [37.9% done] [  8130/  7447 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [41.4% done] [ 11189/  3351 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [44.8% done] [  8496/  6164 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [48.3% done] [ 11820/  2111 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [  8244/  3917 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.3% done] [  7496/  3567 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [56.7% done] [  4942/  5775 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  4636/  4909 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [61.3% done] [ 10555/   195 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26716, got signal=6
Threads: 2: [mm_] [60.6% done] [  3145/  4311 kb/s] [eta 00m:13s]
Threads: 2: [mV_] [61.8% done] [ 11775/   760 kb/s] [eta 00m:13s]
Threads: 2: [mV_] [62.9% done] [ 26882/   284 kb/s] [eta 00m:13s]
Threads: 1: [m__] [65.7% done] [ 15481/     0 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26714, got signal=6

fio: (groupid=0): err= 0: pid=26714
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.7%, 8=92.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=3.6%, 50=13.4%, 100=41.1%
     lat (msec): 250=28.3%, 500=12.4%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26715
  read : io=100MiB, bw=4,612KiB/s, runt= 22644msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  402, avg=67.23, stdev=56.54
    bw (KiB/s) : min=  301, max=30056, per=55.15%, avg=5923.34, stdev=6962.85
  write: io=43,756KiB, bw=2,153KiB/s, runt= 20807msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   31, max=  278, avg=115.02, stdev=78.25
    bw (KiB/s) : min=    0, max= 8256, per=67.12%, avg=3730.06, stdev=2815.00
  cpu          : usr=0.88%, sys=0.32%, ctx=7791
  IO depths    : 1=0.1%, 2=1.3%, 4=15.4%, 8=83.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.9%, 10=3.8%, 20=6.7%, 50=25.9%, 100=41.7%
     lat (msec): 250=13.5%, 500=6.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26716
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.1%, 50=19.4%, 100=49.9%
     lat (msec): 250=21.6%, 500=8.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=232MiB, aggrb=10,740KiB/s, minb=0KiB/s, maxb=4,612KiB/s, mint=0msec, maxt=22644msec
  WRITE: io=110MiB, aggrb=5,557KiB/s, minb=0KiB/s, maxb=2,153KiB/s, mint=0msec, maxt=22644msec

Disk stats (read/write):
  cciss!c0d0: ios=4230/1895, merge=633/287, ticks=47360/28480, in_queue=75840, util=99.26%
0.59user 0.26system 0:23.79elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
475224inputs+225880outputs (0major+2450minor)pagefaults 0swaps