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=22589, got signal=6
Threads: 2
Threads: 2: [F_m] [27.3% done] [  2788/   340 kb/s] [eta 00m:08s]
Threads: 2: [F_m] [26.7% done] [   512/     0 kb/s] [eta 00m:11s]
Threads: 2: [F_m] [26.3% done] [   600/     0 kb/s] [eta 00m:14s]
Threads: 2: [F_m] [28.6% done] [  1572/   424 kb/s] [eta 00m:15s]
Threads: 2: [F_m] [33.3% done] [   692/  5924 kb/s] [eta 00m:14s]
Threads: 2: [F_m] [53.3% done] [  1060/ 31092 kb/s] [eta 00m:07s]
Threads: 2: [F_m] [56.2% done] [  1112/     0 kb/s] [eta 00m:07s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22590, got signal=6
Threads: 1: [F__] [100.0% done] [   700/ 19456 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__] [81.0% done] [ 20164/     0 kb/s] [eta 00m:04s]
Threads: 1: [V__] [100.0% done] [ 41392/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=22588
  read : io=100MiB, bw=5,390KiB/s, runt= 19454msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  270, avg=20.12, stdev=34.32
    bw (KiB/s) : min=    6, max=41320, per=296.73%, avg=19032.10, stdev=18297.63
  write: io=95,888KiB, bw=5,895KiB/s, runt= 16656msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  215, avg= 0.87, stdev= 8.91
    bw (KiB/s) : min=    0, max=125468, per=291.57%, avg=50380.33, stdev=66282.68
  cpu          : usr=4.01%, sys=2.24%, ctx=6491
  IO depths    : 1=1.2%, 2=54.0%, 4=32.1%, 8=12.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.7%, 4=0.3%, 10=21.8%, 20=17.6%, 50=6.1%, 100=2.2%
     lat (msec): 250=1.9%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22589
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=94.7%, 4=2.5%, 8=2.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.9%, 4=0.6%, 10=0.7%, 20=0.1%, 50=0.2%, 100=0.7%
     lat (msec): 250=1.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22590
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=83.7%, 4=3.8%, 8=12.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=83.8%, 4=0.9%, 10=0.0%, 20=0.2%, 50=0.4%, 100=1.9%
     lat (msec): 250=5.2%, 500=5.6%, 750=0.4%, 1000=0.4%, >=2000=0.8%

Run status group 0 (all jobs):
   READ: io=119MiB, aggrb=6,414KiB/s, minb=0KiB/s, maxb=5,390KiB/s, mint=0msec, maxt=19454msec
  WRITE: io=274MiB, aggrb=17,279KiB/s, minb=0KiB/s, maxb=5,895KiB/s, mint=0msec, maxt=19454msec

Disk stats (read/write):
  sda: ios=1507/3055, merge=375/66926, ticks=26740/2075224, in_queue=2107764, util=98.14%
2.28user 0.99system 0:19.87elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2489minor)pagefaults 0swaps