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] [7.9% done] [ 11304/  6124 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [9.5% done] [  9680/  6064 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [12.2% done] [ 10060/  5696 kb/s] [eta 00m:36s]
Threads: 3: [mmm] [15.0% done] [ 10096/  6400 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [17.9% done] [  5296/  7012 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [20.5% done] [  9440/  3188 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [22.5% done] [  8580/  4452 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [25.6% done] [  9824/  3824 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [28.2% done] [  9640/  4185 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [29.3% done] [  7383/  4579 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [32.5% done] [  8196/  3486 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.0% done] [  7078/  3957 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [37.5% done] [  7025/  4148 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  6656/  3514 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [42.5% done] [  2243/  7635 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.0% done] [  1690/  7842 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [47.5% done] [  7801/  1787 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [48.8% done] [  3072/  6371 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [50.0% done] [  1393/  7330 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19377, got signal=6
Threads: 2: [mm_] [52.4% done] [  6660/   268 kb/s] [eta 00m:20s]
Threads: 2: [mm_] [56.1% done] [  4965/  4262 kb/s] [eta 00m:18s]
Threads: 2: [mm_] [60.0% done] [  4408/  2690 kb/s] [eta 00m:16s]
Threads: 2: [mm_] [64.1% done] [  3197/  4839 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19376, got signal=6
Threads: 1: [m__] [66.7% done] [   946/  6139 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19375, got signal=6

fio: (groupid=0): err= 0: pid=19375
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.1%, 2=4.8%, 4=37.7%, 8=56.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=2.1%, 4=0.0%, 10=2.3%, 20=4.8%, 50=22.6%, 100=18.7%
     lat (msec): 250=34.2%, 500=13.7%, 750=1.1%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19376
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.4%, 4=29.7%, 8=67.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.0%, 10=1.2%, 20=1.9%, 50=12.0%, 100=22.2%
     lat (msec): 250=54.5%, 500=6.6%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19377
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.8%, 4=33.2%, 8=63.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.1%, 10=1.3%, 20=3.2%, 50=15.4%, 100=25.1%
     lat (msec): 250=51.6%, 500=2.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2971/2742, merge=455/172, ticks=54768/48836, in_queue=103596, util=99.19%
0.23user 0.37system 0:27.04elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2509minor)pagefaults 0swaps