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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1109, got signal=6
Threads: 2
Threads: 2: [m_F] [27.3% done] [  1973/ 43318 kb/s] [eta 00m:08s]
Threads: 2: [m_F] [66.7% done] [  2112/ 45744 kb/s] [eta 00m:02s]
Threads: 2: [m_F] [62.5% done] [   920/     0 kb/s] [eta 00m:03s]
Threads: 2: [F_F] [100.0% done] [   720/ 12212 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [68.2% done] [  9128/     0 kb/s] [eta 00m:07s]
Threads: 2: [V_V] [80.0% done] [ 24700/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_V] [89.5% done] [ 31448/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_V] [100.0% done] [ 36192/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 35096/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 29704/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=1108
  read : io=100MiB, bw=4,954KiB/s, runt= 21163msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  689, avg=53.45, stdev=90.94
    bw (KiB/s) : min=    9, max=21307, per=81.57%, avg=8166.83, stdev=7584.84
  write: io=89,996KiB, bw=6,221KiB/s, runt= 14812msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  264, avg= 1.64, stdev=14.48
    bw (KiB/s) : min=    0, max=22330, per=56.61%, avg=11110.67, stdev=11165.40
  cpu          : usr=3.33%, sys=2.04%, ctx=7070
  IO depths    : 1=1.3%, 2=53.3%, 4=29.9%, 8=15.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.9%, 4=0.2%, 10=18.4%, 20=14.9%, 50=5.1%, 100=2.0%
     lat (msec): 250=9.0%, 500=2.1%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1109
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=94.7%, 4=3.3%, 8=1.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=97.1%, 4=0.1%, 10=0.0%, 20=0.0%, 50=0.0%, 100=0.3%
     lat (msec): 250=2.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1110
  read : io=100MiB, bw=4,983KiB/s, runt= 21043msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  378, avg=35.56, stdev=57.73
    bw (KiB/s) : min=    4, max=23454, per=123.04%, avg=12319.07, stdev=8067.59
  write: io=93,760KiB, bw=6,487KiB/s, runt= 14800msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  174, avg= 0.64, stdev= 8.27
    bw (KiB/s) : min=    0, max=131457, per=334.92%, avg=65728.50, stdev=92954.14
  cpu          : usr=3.40%, sys=1.94%, ctx=7067
  IO depths    : 1=1.1%, 2=54.5%, 4=31.2%, 8=13.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.8%, 4=0.4%, 10=17.7%, 20=17.8%, 50=5.1%, 100=1.4%
     lat (msec): 250=7.0%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=202MiB, aggrb=10,012KiB/s, minb=0KiB/s, maxb=4,983KiB/s, mint=21043msec, maxt=21163msec
  WRITE: io=277MiB, aggrb=19,625KiB/s, minb=0KiB/s, maxb=6,487KiB/s, mint=21043msec, maxt=21163msec

Disk stats (read/write):
  sda: ios=2377/2235, merge=1140/68642, ticks=43336/1966988, in_queue=2010352, util=99.10%
2.19user 1.12system 0:21.46elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2480minor)pagefaults 0swaps