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=25746, got signal=6
Threads: 2
Threads: 2: [F_m] [42.9% done] [   788/     0 kb/s] [eta 00m:04s]
Threads: 2: [F_F] [100.0% done] [   650/ 39509 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: [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] [66.7% done] [    32/     0 kb/s] [eta 00m:08s]
Threads: 2: [V_V] [70.8% done] [ 16534/     0 kb/s] [eta 00m:07s]
Threads: 2: [V_V] [81.8% done] [ 34450/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_V] [90.5% done] [ 34194/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_V] [100.0% done] [ 37262/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 33011/     0 kb/s] [eta 00m:00s]
Threads: 1: [E_V] [100.0% done] [ 30004/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=25745
  read : io=100MiB, bw=4,718KiB/s, runt= 22219msec
    clat (msec): min=    0, max=  342, avg=27.76, stdev=46.72
    bw (KiB/s) : min=    0, max=24186, per=162.08%, avg=15506.27, stdev=7963.11
  write: io=100MiB, bw=6,501KiB/s, runt= 16128msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   14, avg= 0.34, stdev= 1.08
    bw (KiB/s) : min=    0, max=119308, per=327.99%, avg=59654.00, stdev=84363.50
  cpu          : usr=3.73%, sys=2.39%, ctx=7533
  IO depths    : 1=0.9%, 2=53.6%, 4=32.4%, 8=13.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.0%, 4=4.5%, 10=15.9%, 20=19.4%, 50=4.1%, 100=1.1%
     lat (msec): 250=5.4%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25746
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=92.8%, 4=2.3%, 8=4.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=91.0%, 4=3.3%, 10=0.3%, 20=0.1%, 50=0.2%, 100=1.4%
     lat (msec): 250=3.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25747
  read : io=100MiB, bw=4,663KiB/s, runt= 22469msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  706, avg=41.54, stdev=78.08
    bw (KiB/s) : min=    2, max=23363, per=104.72%, avg=10018.28, stdev=7424.93
  write: io=86,952KiB, bw=5,523KiB/s, runt= 16120msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  515, avg= 1.78, stdev=22.69
    bw (KiB/s) : min=    0, max=24740, per=68.01%, avg=12370.00, stdev=17493.82
  cpu          : usr=3.19%, sys=1.69%, ctx=7941
  IO depths    : 1=0.8%, 2=51.4%, 4=30.2%, 8=17.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.7%, 4=3.4%, 10=12.4%, 20=21.4%, 50=3.5%, 100=2.9%
     lat (msec): 250=7.1%, 500=0.8%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=205MiB, aggrb=9,567KiB/s, minb=0KiB/s, maxb=4,718KiB/s, mint=22469msec, maxt=22469msec
  WRITE: io=280MiB, aggrb=18,188KiB/s, minb=0KiB/s, maxb=6,501KiB/s, mint=22469msec, maxt=22469msec

Disk stats (read/write):
  sda: ios=2287/3145, merge=793/68245, ticks=34384/2104664, in_queue=2142276, util=98.90%
2.40user 1.22system 0:22.74elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2483minor)pagefaults 0swaps