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=1295, got signal=6
Threads: 2
Threads: 2
Threads: 2: [_FF] [100.0% done] [   836/ 18088 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [71.4% done] [ 15800/     0 kb/s] [eta 00m:06s]
Threads: 2: [_VV] [80.0% done] [ 34004/     0 kb/s] [eta 00m:04s]
Threads: 2: [_VV] [89.5% done] [ 29020/     0 kb/s] [eta 00m:02s]
Threads: 2: [_VV] [100.0% done] [ 38124/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [100.0% done] [ 36936/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [100.0% done] [ 26904/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=1295
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=97.9%, 4=1.4%, 8=0.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=97.9%, 4=1.3%, 10=0.3%, 20=0.3%, 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=1296
  read : io=100MiB, bw=4,966KiB/s, runt= 21114msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  550, avg=39.93, stdev=71.54
    bw (KiB/s) : min=    8, max=25754, per=113.77%, avg=11256.19, stdev=8947.12
  write: io=96,460KiB, bw=6,821KiB/s, runt= 14480msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  423, avg= 1.46, stdev=16.97
    bw (KiB/s) : min=    0, max=139378, per=230.49%, avg=49099.33, stdev=78283.84
  cpu          : usr=3.41%, sys=1.71%, ctx=4958
  IO depths    : 1=1.3%, 2=54.5%, 4=31.4%, 8=12.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.1%, 4=0.2%, 10=18.4%, 20=14.7%, 50=8.0%, 100=1.5%
     lat (msec): 250=6.5%, 500=1.3%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1297
  read : io=100MiB, bw=4,946KiB/s, runt= 21193msec
    clat (msec): min=    0, max=  429, avg=30.68, stdev=54.18
    bw (KiB/s) : min=    4, max=32889, per=149.99%, avg=14839.69, stdev=10309.48
  write: io=100MiB, bw=7,245KiB/s, runt= 14472msec
    slat (msec): min=    0, max=    2, avg= 0.00, stdev= 0.05
    clat (msec): min=    0, max=    3, avg= 0.19, stdev= 0.41
    bw (KiB/s) : min=    0, max=125231, per=293.94%, avg=62615.50, stdev=88551.69
  cpu          : usr=3.93%, sys=1.85%, ctx=4958
  IO depths    : 1=1.6%, 2=56.3%, 4=31.7%, 8=10.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=51.0%, 4=0.3%, 10=19.6%, 20=14.9%, 50=7.6%, 100=0.8%
     lat (msec): 250=5.1%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=9,894KiB/s, minb=0KiB/s, maxb=4,966KiB/s, mint=21114msec, maxt=21193msec
  WRITE: io=294MiB, aggrb=21,302KiB/s, minb=0KiB/s, maxb=7,245KiB/s, mint=21114msec, maxt=21193msec

Disk stats (read/write):
  sda: ios=2073/2696, merge=729/72405, ticks=49416/1997544, in_queue=2049972, util=98.87%
2.48user 1.03system 0:21.49elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps