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] [ 14051/  6997 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 16965/  3563 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 10966/  9400 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [  8484/  9692 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 16465/  3245 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 13593/  3880 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 12767/  4689 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  8497/  7915 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 12214/  3376 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  5714/  8293 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9875/  4665 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7135/  5148 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9347/  2546 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6182/  4287 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7093/  1285 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8704/   902 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4862, got signal=6
Threads: 2: [_mm] [63.3% done] [  5343/  2072 kb/s] [eta 00m:11s]
Threads: 2: [_mV] [62.5% done] [  7166/  2452 kb/s] [eta 00m:12s]
Threads: 2: [_mV] [63.6% done] [ 17274/     0 kb/s] [eta 00m:12s]
Threads: 1: [_m_] [66.7% done] [  6536/  1952 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4863, got signal=6

fio: (groupid=0): err= 0: pid=4862
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.1%, 20=1.2%, 50=7.0%, 100=46.0%
     lat (msec): 250=45.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4863
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.5%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.5%, 50=12.2%, 100=42.1%
     lat (msec): 250=41.1%, 500=1.4%, 750=0.6%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4864
  read : io=100MiB, bw=4,892KiB/s, runt= 21348msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    2, max=  219, avg=78.32, stdev=42.34
    bw (KiB/s) : min=   79, max=16809, per=46.71%, avg=5151.33, stdev=3725.49
  write: io=23,368KiB, bw=1,205KiB/s, runt= 19843msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   31, max=  395, avg=97.22, stdev=49.31
    bw (KiB/s) : min=    0, max= 6612, per=46.46%, avg=2393.54, stdev=2619.39
  cpu          : usr=0.34%, sys=0.41%, ctx=7241
  IO depths    : 1=0.1%, 2=0.3%, 4=12.7%, 8=86.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=2.8%, 20=6.7%, 50=16.5%, 100=39.4%
     lat (msec): 250=33.7%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=225MiB, aggrb=11,028KiB/s, minb=0KiB/s, maxb=4,892KiB/s, mint=21348msec, maxt=21348msec
  WRITE: io=99,844KiB, aggrb=5,152KiB/s, minb=0KiB/s, maxb=1,205KiB/s, mint=21348msec, maxt=21348msec

Disk stats (read/write):
  cciss!c0d0: ios=4363/2068, merge=846/148, ticks=50676/31044, in_queue=81716, util=98.84%
0.23user 0.43system 0:22.60elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
459896inputs+199864outputs (0major+2442minor)pagefaults 0swaps