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] [ 14761/  7284 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [19.0% done] [ 18189/  3298 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 21110/   866 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  9762/  7610 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 13868/  5510 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  9757/  6914 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [  7931/  9802 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [  7813/  7284 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  3258/ 10020 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  6674/  6821 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9395/  4958 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  9513/  2843 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  7862/  3188 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [ 11262/   780 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6300/  2822 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  3754/  5454 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  1836/  5571 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2081, got signal=6
Threads: 2: [m_m] [64.5% done] [  3075/  3823 kb/s] [eta 00m:11s]
Threads: 2: [m_V] [63.6% done] [ 25474/   158 kb/s] [eta 00m:12s]
Threads: 1: [m__] [66.7% done] [ 21419/   736 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2080, got signal=6

fio: (groupid=0): err= 0: pid=2080
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.3%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=0.8%, 50=9.9%, 100=42.8%
     lat (msec): 250=43.3%, 500=2.1%, 750=0.5%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2081
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.4%, 50=8.8%, 100=54.1%
     lat (msec): 250=36.0%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2082
  read : io=99MiB, bw=4,768KiB/s, runt= 21869msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  195, avg=55.37, stdev=44.96
    bw (KiB/s) : min=    2, max=33258, per=50.54%, avg=5558.03, stdev=7177.10
  write: io=43,920KiB, bw=2,222KiB/s, runt= 20239msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   14, max=  267, avg=98.94, stdev=37.49
    bw (KiB/s) : min=    0, max= 7981, per=45.33%, avg=2647.55, stdev=2019.69
  cpu          : usr=0.38%, sys=0.48%, ctx=7839
  IO depths    : 1=0.2%, 2=2.3%, 4=21.0%, 8=76.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=2.7%, 10=11.7%, 20=8.9%, 50=14.0%, 100=34.3%
     lat (msec): 250=27.5%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=229MiB, aggrb=10,998KiB/s, minb=0KiB/s, maxb=4,768KiB/s, mint=21869msec, maxt=21869msec
  WRITE: io=113MiB, aggrb=5,841KiB/s, minb=0KiB/s, maxb=2,222KiB/s, mint=21869msec, maxt=21869msec

Disk stats (read/write):
  cciss!c0d0: ios=4200/2419, merge=718/153, ticks=42932/31788, in_queue=74704, util=99.03%
0.24user 0.38system 0:23.06elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
470072inputs+230928outputs (0major+2454minor)pagefaults 0swaps