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
Threads: 3
Threads: 3: [mmm] [8.3% done] [ 10688/  2228 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [10.8% done] [ 11929/     0 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [13.9% done] [ 12740/     0 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [16.7% done] [ 11472/  2615 kb/s] [eta 00m:30s]
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Threads: 3: [mmm] [21.1% done] [  4537/  5860 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [23.7% done] [  6876/  5376 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [25.0% done] [  7219/  3820 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [28.2% done] [  5706/  6049 kb/s] [eta 00m:28s]
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Threads: 3: [mmm] [34.1% done] [  9275/     0 kb/s] [eta 00m:27s]
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Threads: 3: [mmm] [58.3% done] [  6136/  1087 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [59.2% done] [  6671/   208 kb/s] [eta 00m:20s]
Threads: 3: [mVm] [58.8% done] [  3985/  2374 kb/s] [eta 00m:21s]
Threads: 3: [mVm] [59.6% done] [ 13768/   488 kb/s] [eta 00m:21s]
Threads: 3: [mVm] [60.4% done] [ 15694/   228 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [61.1% done] [ 10696/  1409 kb/s] [eta 00m:21s]
Threads: 2: [m_m] [63.0% done] [  2965/  4710 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15942, got signal=6
Threads: 1: [__m] [66.0% done] [  3650/  3840 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15944, got signal=6

fio: (groupid=0): err= 0: pid=15942
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=2.4%, 4=23.9%, 8=73.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=0.0%, 20=3.8%, 50=23.2%, 100=5.4%
     lat (msec): 250=56.5%, 500=8.1%, 750=1.4%, 1000=0.7%, >=2000=0.3%
fio: (groupid=0): err= 0: pid=15943
  read : io=100MiB, bw=3,168KiB/s, runt= 33046msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    9, max=  527, avg=115.39, stdev=88.72
    bw (KiB/s) : min=   17, max=16140, per=47.74%, avg=3535.73, stdev=3603.84
  write: io=37,992KiB, bw=1,300KiB/s, runt= 29925msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  455, avg=149.86, stdev=67.04
    bw (KiB/s) : min=    0, max= 4564, per=56.81%, avg=2060.60, stdev=1579.84
  cpu          : usr=0.04%, sys=0.18%, ctx=5033
  IO depths    : 1=0.4%, 2=2.3%, 4=28.2%, 8=69.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=0.5%, 20=3.7%, 50=28.9%, 100=8.9%
     lat (msec): 250=51.5%, 500=5.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15944
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.9%, 4=17.5%, 8=81.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.0%, 20=1.3%, 50=13.1%, 100=4.4%
     lat (msec): 250=68.0%, 500=10.3%, 750=1.6%, 1000=0.7%, >=2000=0.1%

Run status group 0 (all jobs):
   READ: io=233MiB, aggrb=7,406KiB/s, minb=0KiB/s, maxb=3,168KiB/s, mint=0msec, maxt=33046msec
  WRITE: io=104MiB, aggrb=3,627KiB/s, minb=0KiB/s, maxb=1,300KiB/s, mint=0msec, maxt=33046msec

Disk stats (read/write):
  sda: ios=4090/2050, merge=710/288, ticks=86832/39280, in_queue=126112, util=99.22%
0.08user 0.31system 0:36.20elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2508minor)pagefaults 0swaps