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] [ 12487/  8928 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [  4169/ 14425 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 11812/  6912 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 17696/  1198 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 16449/  3359 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  5997/  9593 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 12503/  5316 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  8228/  6497 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  6056/  8309 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [ 10063/  5031 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6131/  7058 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  5702/  6748 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  4542/  6318 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  7460/  4096 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [ 10449/     0 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  7842/  1801 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  9945/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7885, got signal=6
Threads: 2: [_mm] [64.5% done] [  3913/  2373 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=7886, got signal=6
Threads: 1: [__m] [67.7% done] [  8488/     0 kb/s] [eta 00m:10s]
Threads: 1: [__V] [78.6% done] [ 17460/     0 kb/s] [eta 00m:06s]
fio: (groupid=0): err= 0: pid=7885
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.0%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.2%, 50=11.3%, 100=44.8%
     lat (msec): 250=42.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7886
  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=0.3%, 20=2.1%, 50=7.4%, 100=43.1%
     lat (msec): 250=45.7%, 500=0.7%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=7887
  read : io=100MiB, bw=4,557KiB/s, runt= 22936msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  707, avg=72.67, stdev=63.01
    bw (KiB/s) : min=  368, max=21701, per=52.66%, avg=5412.55, stdev=4322.08
  write: io=31,204KiB, bw=1,500KiB/s, runt= 21291msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   59, max=  199, avg=108.02, stdev=22.53
    bw (KiB/s) : min=    0, max= 5285, per=63.88%, avg=3311.50, stdev=1890.47
  cpu          : usr=0.31%, sys=0.73%, ctx=7880
  IO depths    : 1=0.1%, 2=0.6%, 4=15.8%, 8=83.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.6%, 10=4.2%, 20=7.6%, 50=20.9%, 100=30.0%
     lat (msec): 250=35.3%, 500=0.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=225MiB, aggrb=10,279KiB/s, minb=0KiB/s, maxb=4,557KiB/s, mint=22936msec, maxt=22936msec
  WRITE: io=105MiB, aggrb=5,184KiB/s, minb=0KiB/s, maxb=1,500KiB/s, mint=22936msec, maxt=22936msec

Disk stats (read/write):
  cciss!c0d0: ios=4538/2225, merge=516/195, ticks=48692/35396, in_queue=84056, util=99.05%
0.21user 0.52system 0:23.29elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
460584inputs+215616outputs (0major+2450minor)pagefaults 0swaps