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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22752, got signal=6
Threads: 2
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22751, got signal=6
Threads: 1
Threads: 1: [__m] [8.3% done] [  2612/  1200 kb/s] [eta 00m:33s]
Threads: 1: [__m] [30.8% done] [  1504/ 33156 kb/s] [eta 00m:09s]
Threads: 1: [__m] [33.3% done] [  2442/     0 kb/s] [eta 00m:10s]
Threads: 1: [__m] [35.3% done] [  1804/     0 kb/s] [eta 00m:11s]
Threads: 1: [__m] [35.0% done] [  1592/     0 kb/s] [eta 00m:13s]
Threads: 1: [__m] [36.4% done] [  2872/     0 kb/s] [eta 00m:14s]
Threads: 1: [__F] [100.0% done] [   589/ 46528 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [68.0% done] [   372/     0 kb/s] [eta 00m:08s]
Threads: 1: [__V] [85.7% done] [ 25132/     0 kb/s] [eta 00m:03s]
Threads: 1: [__V] [100.0% done] [ 26964/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=22751
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=93.9%, 4=2.9%, 8=3.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.4%, 4=0.7%, 10=0.1%, 20=0.1%, 50=0.1%, 100=0.3%
     lat (msec): 250=2.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22752
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=97.3%, 4=2.6%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=98.7%, 4=1.0%, 10=0.1%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22753
  read : io=100MiB, bw=5,134KiB/s, runt= 20421msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  559, avg=51.85, stdev=101.12
    bw (KiB/s) : min=    6, max=33660, per=160.29%, avg=8755.13, stdev=11634.54
  write: io=80,476KiB, bw=4,779KiB/s, runt= 17243msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  518, avg= 2.97, stdev=28.02
    bw (KiB/s) : min=    0, max= 6383, per=15.96%, avg=2641.33, stdev=3330.72
  cpu          : usr=3.17%, sys=1.78%, ctx=5228
  IO depths    : 1=1.0%, 2=50.6%, 4=29.5%, 8=18.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.0%, 4=0.9%, 10=14.4%, 20=21.3%, 50=6.8%, 100=1.4%
     lat (msec): 250=3.4%, 500=4.6%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=106MiB, aggrb=5,462KiB/s, minb=0KiB/s, maxb=5,134KiB/s, mint=20421msec, maxt=20421msec
  WRITE: io=272MiB, aggrb=16,552KiB/s, minb=0KiB/s, maxb=4,779KiB/s, mint=20421msec, maxt=20421msec

Disk stats (read/write):
  sda: ios=1547/3321, merge=531/66002, ticks=29712/2242648, in_queue=2279028, util=98.27%
2.22user 0.86system 0:20.81elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2510minor)pagefaults 0swaps