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] [11.5% done] [ 13132/  7832 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [16.0% done] [ 13944/  6056 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [20.0% done] [  6248/ 13388 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [23.1% done] [ 15336/  1388 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [26.9% done] [ 13432/  3980 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [29.6% done] [  8332/  7620 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [34.6% done] [ 12356/  3980 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 13444/  1516 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 11512/  2372 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  9820/  4096 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  9192/  3592 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  4388/  8736 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  4364/  7252 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  3820/  6296 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  7384/  2212 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  2212/  7324 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [63.3% done] [  4764/  4440 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.5% done] [  6384/   224 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28851, got signal=6
Threads: 2: [m_m] [65.6% done] [  3680/  3032 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28850, got signal=6
Threads: 1: [__V] [68.8% done] [  6916/  1856 kb/s] [eta 00m:10s]
Threads: 1: [__V] [85.2% done] [ 21992/     0 kb/s] [eta 00m:04s]
fio: (groupid=0): err= 0: pid=28850
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=3.1%, 4=33.5%, 8=62.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.0%, 10=1.8%, 20=3.3%, 50=17.4%, 100=28.3%
     lat (msec): 250=45.2%, 500=3.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28851
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.0%, 4=26.1%, 8=71.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.3%, 10=1.5%, 20=2.7%, 50=16.6%, 100=32.3%
     lat (msec): 250=44.9%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28852
  read : io=100MiB, bw=4,277KiB/s, runt= 24509msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  631, avg=73.86, stdev=66.77
    bw (KiB/s) : min=    6, max=22365, per=45.57%, avg=4612.86, stdev=5784.70
  write: io=42,904KiB, bw=1,955KiB/s, runt= 22464msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  695, avg=97.12, stdev=98.16
    bw (KiB/s) : min=    0, max=10086, per=59.48%, avg=2918.29, stdev=2918.00
  cpu          : usr=0.36%, sys=0.52%, ctx=6503
  IO depths    : 1=0.6%, 2=3.9%, 4=40.5%, 8=54.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.5%, 10=3.7%, 20=13.6%, 50=27.4%, 100=20.9%
     lat (msec): 250=30.6%, 500=1.8%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=237MiB, aggrb=10,122KiB/s, minb=0KiB/s, maxb=4,277KiB/s, mint=24509msec, maxt=24509msec
  WRITE: io=105MiB, aggrb=4,906KiB/s, minb=0KiB/s, maxb=1,955KiB/s, mint=24509msec, maxt=24509msec

Disk stats (read/write):
  sda: ios=4057/2071, merge=489/186, ticks=47532/253912, in_queue=301424, util=98.68%
0.26user 0.38system 0:24.88elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2477minor)pagefaults 0swaps