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] [7.5% done] [  5844/ 10908 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [9.8% done] [  9020/  6704 kb/s] [eta 00m:37s]
Threads: 3: [mmm] [13.9% done] [ 10603/  4391 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [16.7% done] [ 11888/  2533 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [19.4% done] [  7680/  6644 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.1% done] [  6440/  6692 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [24.3% done] [  6944/  5680 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [27.0% done] [ 10128/  1952 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [29.7% done] [  6284/  6284 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [30.8% done] [  5853/  6386 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [32.5% done] [  8140/  3560 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [35.9% done] [  9370/  1946 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  5513/  5193 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [40.0% done] [  6785/  4163 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [41.5% done] [  4012/  5628 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  5196/  4280 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [   972/  8368 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [  2248/  6640 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [50.0% done] [  2868/  5132 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [51.2% done] [  5596/  2248 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  2340/  4972 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14645, got signal=6
Threads: 2: [m_m] [55.8% done] [  1780/  6380 kb/s] [eta 00m:19s]
Threads: 2: [m_m] [59.5% done] [   688/  7520 kb/s] [eta 00m:17s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14646, got signal=6
Threads: 1: [m__] [65.0% done] [   344/  7692 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14644, got signal=6

fio: (groupid=0): err= 0: pid=14644
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=4.4%, 4=39.1%, 8=55.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.2%, 4=0.0%, 10=2.9%, 20=4.8%, 50=29.0%, 100=13.1%
     lat (msec): 250=34.8%, 500=12.6%, 750=0.8%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14645
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.5%, 4=40.5%, 8=55.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.1%, 10=1.2%, 20=3.2%, 50=20.0%, 100=26.4%
     lat (msec): 250=42.8%, 500=5.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14646
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.8%, 4=35.2%, 8=61.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.1%, 10=1.6%, 20=2.3%, 50=13.8%, 100=23.8%
     lat (msec): 250=53.0%, 500=4.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=2721/3206, merge=323/228, ticks=50828/48788, in_queue=99616, util=98.65%
0.24user 0.38system 0:27.82elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2496minor)pagefaults 0swaps