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] [ 20113/  1452 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 17990/  3197 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 16615/  2399 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 14293/  4588 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 16278/  2627 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 13040/  4075 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  7329/ 10254 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [ 12263/  3494 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  7378/  8338 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  3339/ 11681 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [ 14333/   138 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [ 10359/  3119 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  8639/  3103 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  7012/  3400 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  6373/  3782 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  1875/  6516 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=545, got signal=6
Threads: 2: [m_m] [61.3% done] [  4498/  2473 kb/s] [eta 00m:12s]
Threads: 2: [m_V] [62.5% done] [ 10978/   256 kb/s] [eta 00m:12s]
Threads: 2: [m_V] [61.8% done] [ 17079/   170 kb/s] [eta 00m:13s]
Threads: 1: [m__] [66.7% done] [  8627/     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=544, got signal=6

fio: (groupid=0): err= 0: pid=544
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=7.7%, 8=91.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.6%, 50=15.9%, 100=28.2%
     lat (msec): 250=50.1%, 500=1.6%, 750=0.7%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=545
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=4.8%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.2%, 50=9.0%, 100=49.0%
     lat (msec): 250=40.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=546
  read : io=100MiB, bw=4,901KiB/s, runt= 21295msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  450, avg=72.24, stdev=45.43
    bw (KiB/s) : min=   29, max=17191, per=48.75%, avg=5756.00, stdev=3932.59
  write: io=25,248KiB, bw=1,313KiB/s, runt= 19683msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   39, max=  391, avg=101.91, stdev=38.27
    bw (KiB/s) : min=    0, max= 5578, per=63.66%, avg=2853.86, stdev=1973.47
  cpu          : usr=0.26%, sys=0.38%, ctx=7323
  IO depths    : 1=0.1%, 2=0.7%, 4=13.4%, 8=85.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.3%, 10=2.8%, 20=6.5%, 50=19.4%, 100=38.7%
     lat (msec): 250=31.3%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=240MiB, aggrb=11,807KiB/s, minb=0KiB/s, maxb=4,901KiB/s, mint=21295msec, maxt=21295msec
  WRITE: io=86,188KiB, aggrb=4,483KiB/s, minb=0KiB/s, maxb=1,313KiB/s, mint=21295msec, maxt=21295msec

Disk stats (read/write):
  cciss!c0d0: ios=4530/1851, merge=748/116, ticks=52108/28460, in_queue=80568, util=98.14%
0.20user 0.54system 0:22.99elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
491208inputs+172424outputs (0major+2444minor)pagefaults 0swaps