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Sequential Writes – SYNC mode

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Mar 16th, 2020
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  1. 4K block size – 100% Writes
  2. fio --name=seqwrite --rw=write --ioengine=sync --bs=4k --numjobs=1 --size=1G --runtime=600
  3.  
  4. seqwrite: (groupid=0, jobs=1): err= 0: pid=23921: Mon Mar 16 07:44:22 2020
  5.   write: io=1024.0MB, bw=574877KB/s, iops=143719, runt=  1824msec
  6.     clat (usec): min=3, max=2021, avg= 5.93, stdev= 9.43
  7.      lat (usec): min=4, max=2022, avg= 6.14, stdev= 9.43
  8.     clat percentiles (usec):
  9.      |  1.00th=[    4],  5.00th=[    4], 10.00th=[    4], 20.00th=[    5],
  10.      | 30.00th=[    5], 40.00th=[    5], 50.00th=[    5], 60.00th=[    5],
  11.      | 70.00th=[    5], 80.00th=[    5], 90.00th=[    6], 95.00th=[    7],
  12.      | 99.00th=[   30], 99.50th=[   34], 99.90th=[   64], 99.95th=[   78],
  13.      | 99.99th=[  163]
  14.     lat (usec) : 4=0.02%, 10=96.12%, 20=0.60%, 50=3.07%, 100=0.17%
  15.     lat (usec) : 250=0.02%, 500=0.01%, 1000=0.01%
  16.     lat (msec) : 2=0.01%, 4=0.01%
  17.   cpu          : usr=10.04%, sys=88.70%, ctx=675, majf=0, minf=14
  18.   IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
  19.      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  20.      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  21.      issued    : total=r=0/w=262144/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
  22.      latency   : target=0, window=0, percentile=100.00%, depth=1
  23.  
  24. Run status group 0 (all jobs):
  25.   WRITE: io=1024.0MB, aggrb=574877KB/s, minb=574877KB/s, maxb=574877KB/s, mint=1824msec, maxt=1824msec
  26.  
  27. ----------------------------------------------------------------------------------------------------
  28.  
  29. 8K block size – 100% Writes
  30. fio --name=seqwrite --rw=write --ioengine=sync --bs=8k --numjobs=1 --size=1G --runtime=600
  31.  
  32. seqwrite: (groupid=0, jobs=1): err= 0: pid=29978: Mon Mar 16 07:45:29 2020
  33.   write: io=1024.0MB, bw=932068KB/s, iops=116508, runt=  1125msec
  34.     clat (usec): min=4, max=685, avg= 7.51, stdev=11.16
  35.      lat (usec): min=4, max=685, avg= 7.74, stdev=11.16
  36.     clat percentiles (usec):
  37.      |  1.00th=[    4],  5.00th=[    4], 10.00th=[    4], 20.00th=[    5],
  38.      | 30.00th=[    5], 40.00th=[    5], 50.00th=[    5], 60.00th=[    5],
  39.      | 70.00th=[    5], 80.00th=[    6], 90.00th=[    7], 95.00th=[   34],
  40.      | 99.00th=[   43], 99.50th=[   61], 99.90th=[  105], 99.95th=[  131],
  41.      | 99.99th=[  290]
  42.     lat (usec) : 10=92.78%, 20=0.80%, 50=5.73%, 100=0.57%, 250=0.11%
  43.     lat (usec) : 500=0.01%, 750=0.01%
  44.   cpu          : usr=9.43%, sys=88.52%, ctx=805, majf=0, minf=15
  45.   IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
  46.      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  47.      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  48.      issued    : total=r=0/w=131072/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
  49.      latency   : target=0, window=0, percentile=100.00%, depth=1
  50.  
  51. Run status group 0 (all jobs):
  52.   WRITE: io=1024.0MB, aggrb=932067KB/s, minb=932067KB/s, maxb=932067KB/s, mint=1125msec, maxt=1125msec
  53.  
  54. ----------------------------------------------------------------------------------------------------
  55.  
  56. 16K block size – 100% Writes
  57. fio --name=seqwrite --rw=write --ioengine=sync --bs=16k --numjobs=1 --size=1G --runtime=600
  58.  
  59. seqwrite: (groupid=0, jobs=1): err= 0: pid=2284: Mon Mar 16 07:45:50 2020
  60.   write: io=1024.0MB, bw=1418.3MB/s, iops=90770, runt=   722msec
  61.     clat (usec): min=4, max=2532, avg= 9.95, stdev=17.30
  62.      lat (usec): min=4, max=2532, avg=10.21, stdev=17.30
  63.     clat percentiles (usec):
  64.      |  1.00th=[    4],  5.00th=[    4], 10.00th=[    4], 20.00th=[    5],
  65.      | 30.00th=[    5], 40.00th=[    5], 50.00th=[    5], 60.00th=[    5],
  66.      | 70.00th=[    6], 80.00th=[    6], 90.00th=[   35], 95.00th=[   39],
  67.      | 99.00th=[   62], 99.50th=[   74], 99.90th=[  109], 99.95th=[  133],
  68.      | 99.99th=[  338]
  69.     lat (usec) : 10=86.27%, 20=1.07%, 50=11.11%, 100=1.40%, 250=0.14%
  70.     lat (usec) : 500=0.01%, 750=0.01%
  71.     lat (msec) : 4=0.01%
  72.   cpu          : usr=7.77%, sys=89.04%, ctx=879, majf=0, minf=8
  73.   IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
  74.      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  75.      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  76.      issued    : total=r=0/w=65536/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
  77.      latency   : target=0, window=0, percentile=100.00%, depth=1
  78.  
  79. Run status group 0 (all jobs):
  80.   WRITE: io=1024.0MB, aggrb=1418.3MB/s, minb=1418.3MB/s, maxb=1418.3MB/s, mint=722msec, maxt=722msec
  81.  
  82. ----------------------------------------------------------------------------------------------------
  83.  
  84. 32K block size – 100% Writes
  85. fio --name=seqwrite --rw=write --ioengine=sync --bs=32k --numjobs=1 --size=1G --runtime=600
  86.  
  87. seqwrite: (groupid=0, jobs=1): err= 0: pid=5825: Mon Mar 16 07:46:04 2020
  88.   write: io=1024.0MB, bw=1359.1MB/s, iops=43516, runt=   753msec
  89.     clat (usec): min=5, max=100136, avg=21.59, stdev=553.57
  90.      lat (usec): min=5, max=100136, avg=22.10, stdev=553.56
  91.     clat percentiles (usec):
  92.      |  1.00th=[    6],  5.00th=[    6], 10.00th=[    6], 20.00th=[    7],
  93.      | 30.00th=[    7], 40.00th=[    7], 50.00th=[    7], 60.00th=[    8],
  94.      | 70.00th=[    9], 80.00th=[   44], 90.00th=[   49], 95.00th=[   52],
  95.      | 99.00th=[   84], 99.50th=[  102], 99.90th=[  155], 99.95th=[  233],
  96.      | 99.99th=[  438]
  97.     lat (usec) : 10=72.08%, 20=2.74%, 50=17.16%, 100=7.48%, 250=0.49%
  98.     lat (usec) : 500=0.04%, 1000=0.01%
  99.     lat (msec) : 2=0.01%, 250=0.01%
  100.   cpu          : usr=2.66%, sys=80.45%, ctx=976, majf=0, minf=9
  101.   IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
  102.      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  103.      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  104.      issued    : total=r=0/w=32768/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
  105.      latency   : target=0, window=0, percentile=100.00%, depth=1
  106.  
  107. Run status group 0 (all jobs):
  108.   WRITE: io=1024.0MB, aggrb=1359.1MB/s, minb=1359.1MB/s, maxb=1359.1MB/s, mint=753msec, maxt=753msec
  109.  
  110. ----------------------------------------------------------------------------------------------------
  111.  
  112. 64K block size – 100% Writes
  113. fio --name=seqwrite --rw=write --ioengine=sync --bs=64k --numjobs=1 --size=1G --runtime=600
  114.  
  115. seqwrite: (groupid=0, jobs=1): err= 0: pid=8313: Mon Mar 16 07:46:20 2020
  116.   write: io=1024.0MB, bw=1563.4MB/s, iops=25013, runt=   655msec
  117.     clat (usec): min=7, max=888, avg=38.32, stdev=33.30
  118.      lat (usec): min=8, max=890, avg=39.09, stdev=33.14
  119.     clat percentiles (usec):
  120.      |  1.00th=[    7],  5.00th=[    8], 10.00th=[    8], 20.00th=[    9],
  121.      | 30.00th=[   10], 40.00th=[   10], 50.00th=[   20], 60.00th=[   57],
  122.      | 70.00th=[   61], 80.00th=[   64], 90.00th=[   69], 95.00th=[   90],
  123.      | 99.00th=[  120], 99.50th=[  135], 99.90th=[  183], 99.95th=[  205],
  124.      | 99.99th=[  844]
  125.     lat (usec) : 10=29.16%, 20=20.81%, 50=1.59%, 100=45.07%, 250=3.33%
  126.     lat (usec) : 500=0.01%, 750=0.02%, 1000=0.01%
  127.   cpu          : usr=4.13%, sys=91.90%, ctx=1196, majf=0, minf=9
  128.   IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
  129.      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  130.      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  131.      issued    : total=r=0/w=16384/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
  132.      latency   : target=0, window=0, percentile=100.00%, depth=1
  133.  
  134. Run status group 0 (all jobs):
  135.   WRITE: io=1024.0MB, aggrb=1563.4MB/s, minb=1563.4MB/s, maxb=1563.4MB/s, mint=655msec, maxt=655msec
  136.  
  137. ----------------------------------------------------------------------------------------------------
  138.  
  139. 128K block size – 100% Writes
  140. fio --name=seqwrite --rw=write --ioengine=sync --bs=128k --numjobs=1 --size=1G --runtime=600
  141.  
  142. seqwrite: (groupid=0, jobs=1): err= 0: pid=9903: Mon Mar 16 07:46:34 2020
  143.   write: io=1024.0MB, bw=4266.7MB/s, iops=34133, runt=   240msec
  144.     clat (usec): min=17, max=416, avg=27.10, stdev=11.79
  145.      lat (usec): min=18, max=418, avg=28.29, stdev=11.81
  146.     clat percentiles (usec):
  147.      |  1.00th=[   19],  5.00th=[   20], 10.00th=[   21], 20.00th=[   22],
  148.      | 30.00th=[   23], 40.00th=[   23], 50.00th=[   24], 60.00th=[   25],
  149.      | 70.00th=[   25], 80.00th=[   27], 90.00th=[   31], 95.00th=[   57],
  150.      | 99.00th=[   67], 99.50th=[   82], 99.90th=[   97], 99.95th=[  111],
  151.      | 99.99th=[  418]
  152.     lat (usec) : 20=2.28%, 50=89.97%, 100=7.67%, 250=0.06%, 500=0.02%
  153.   cpu          : usr=13.81%, sys=78.24%, ctx=631, majf=0, minf=9
  154.   IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
  155.      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  156.      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
  157.      issued    : total=r=0/w=8192/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
  158.      latency   : target=0, window=0, percentile=100.00%, depth=1
  159.  
  160. Run status group 0 (all jobs):
  161.   WRITE: io=1024.0MB, aggrb=4266.7MB/s, minb=4266.7MB/s, maxb=4266.7MB/s, mint=240msec, maxt=240msec
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