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] [13.6% done] [ 13502/  7119 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 10669/  9310 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 14171/  5352 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 16384/  3831 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 15293/  3973 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 13496/  3404 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 15208/  2822 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  9900/  6190 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  6434/  7630 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  9683/  3917 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 10612/  3640 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7354/  5218 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  8895/  3412 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  7716/  2363 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  8419/  1430 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  4641/  4653 kb/s] [eta 00m:12s]
Threads: 3: [mVm] [61.3% done] [  9500/   715 kb/s] [eta 00m:12s]
Threads: 3: [mVm] [60.6% done] [ 18466/   484 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4801, got signal=6
Threads: 1: [__m] [61.8% done] [ 10677/   658 kb/s] [eta 00m:13s]
Threads: 1: [__m] [66.7% done] [  3233/  3839 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4803, got signal=6

fio: (groupid=0): err= 0: pid=4801
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.0%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.4%, 50=10.1%, 100=46.1%
     lat (msec): 250=40.9%, 500=1.1%, 750=0.7%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4802
  read : io=100MiB, bw=5,097KiB/s, runt= 20501msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    2, max=  221, avg=74.16, stdev=40.04
    bw (KiB/s) : min=  192, max=17629, per=46.84%, avg=5550.03, stdev=4287.73
  write: io=27,816KiB, bw=1,512KiB/s, runt= 18827msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   43, max=  194, avg=120.92, stdev=30.53
    bw (KiB/s) : min=    0, max= 7262, per=54.86%, avg=2906.08, stdev=2744.31
  cpu          : usr=0.33%, sys=0.55%, ctx=6972
  IO depths    : 1=0.2%, 2=0.4%, 4=12.1%, 8=87.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=2.3%, 20=3.3%, 50=18.5%, 100=44.7%
     lat (msec): 250=30.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4803
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.0%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.8%, 50=19.9%, 100=23.7%
     lat (msec): 250=52.8%, 500=1.0%, 750=0.7%, 1000=0.5%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=232MiB, aggrb=11,849KiB/s, minb=0KiB/s, maxb=5,097KiB/s, mint=0msec, maxt=20501msec
  WRITE: io=97,404KiB, aggrb=5,297KiB/s, minb=0KiB/s, maxb=1,512KiB/s, mint=0msec, maxt=20501msec

Disk stats (read/write):
  cciss!c0d0: ios=4401/2016, merge=847/106, ticks=50296/32160, in_queue=82460, util=98.86%
0.23user 0.39system 0:23.01elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
474552inputs+194848outputs (0major+2447minor)pagefaults 0swaps