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=21411, got signal=6
Threads: 2
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21412, got signal=6
Threads: 1: [__F] [100.0% done] [   608/ 39064 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] [68.8% done] [  2940/     0 kb/s] [eta 00m:05s]
Threads: 1: [__V] [75.0% done] [  7240/     0 kb/s] [eta 00m:04s]
Threads: 1: [__V] [86.7% done] [ 17972/     0 kb/s] [eta 00m:02s]
Threads: 1: [__V] [93.3% done] [  9968/     0 kb/s] [eta 00m:01s]
Threads: 1: [__V] [100.0% done] [ 22232/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [ 19332/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [  9884/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [  7644/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=21411
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=93.1%, 4=4.2%, 8=2.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.5%, 4=1.3%, 10=0.0%, 20=0.1%, 50=0.5%, 100=0.5%
     lat (msec): 250=0.9%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21412
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=93.7%, 4=2.4%, 8=3.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=93.2%, 4=1.1%, 10=1.1%, 20=0.0%, 50=0.1%, 100=0.5%
     lat (msec): 250=2.0%, 500=1.8%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21413
  read : io=100MiB, bw=5,604KiB/s, runt= 18709msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  367, avg=38.82, stdev=53.14
    bw (KiB/s) : min=    6, max=24041, per=178.32%, avg=10877.61, stdev=7660.88
  write: io=98MiB, bw=9,692KiB/s, runt= 10587msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  203, avg= 0.72, stdev= 7.63
    bw (KiB/s) : min=    0, max=51189, per=89.43%, avg=25594.50, stdev=36196.09
  cpu          : usr=4.40%, sys=2.48%, ctx=5473
  IO depths    : 1=1.1%, 2=53.2%, 4=32.9%, 8=12.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.8%, 4=1.5%, 10=16.1%, 20=11.6%, 50=9.5%, 100=6.6%
     lat (msec): 250=5.2%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=109MiB, aggrb=6,100KiB/s, minb=0KiB/s, maxb=5,604KiB/s, mint=18709msec, maxt=18709msec
  WRITE: io=289MiB, aggrb=28,619KiB/s, minb=0KiB/s, maxb=9,692KiB/s, mint=18709msec, maxt=18709msec

Disk stats (read/write):
  sda: ios=1275/2682, merge=524/65692, ticks=36860/2139012, in_queue=2559756, util=99.25%
2.42user 1.00system 0:19.04elapsed 18%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2503minor)pagefaults 0swaps