Re: speed decrease since firefly,giant,hammer the 2nd try

[Stefan Priebe <s.priebe@profihost.ag>]

Am 10.02.2015 um 22:38 schrieb Mark Nelson:
> On 02/10/2015 03:11 PM, Stefan Priebe wrote:
>>
>> mhm i installed librbd1-dbg and librados2-dbg - but the output still
>> looks useless to me. Should i upload it somewhere?
>
> Meh, if it's all just symbols it's probably not that helpful.
>
> I've summarized your results here:
>
> 1 concurrent 4k write (libaio, direct=1, iodepth=1)
>
>          IOPS        Latency
>          wb on    wb off    wb on    wb off
> dumpling    10870    536    ~100us    ~2ms
> firefly        10350    525    ~100us    ~2ms
>
> So in single op tests dumpling and firefly are far closer.  Now let's
> see each of these cases with iodepth=32 (still 1 thread for now).


dumpling:

file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=32
2.0.8
Starting 1 thread
Jobs: 1 (f=1): [w] [100.0% done] [0K/72812K /s] [0 /18.3K iops] [eta 
00m:00s]
file1: (groupid=0, jobs=1): err= 0: pid=3011
   write: io=2060.6MB, bw=70329KB/s, iops=17582 , runt= 30001msec
     slat (usec): min=1 , max=3517 , avg= 3.42, stdev= 7.30
     clat (usec): min=93 , max=7475 , avg=1815.72, stdev=233.43
      lat (usec): min=219 , max=7477 , avg=1819.27, stdev=233.52
     clat percentiles (usec):
      |  1.00th=[ 1480],  5.00th=[ 1576], 10.00th=[ 1608], 20.00th=[ 1672],
      | 30.00th=[ 1704], 40.00th=[ 1752], 50.00th=[ 1800], 60.00th=[ 1832],
      | 70.00th=[ 1896], 80.00th=[ 1960], 90.00th=[ 2064], 95.00th=[ 2128],
      | 99.00th=[ 2352], 99.50th=[ 2448], 99.90th=[ 4704], 99.95th=[ 5344],
      | 99.99th=[ 7072]
     bw (KB/s)  : min=59696, max=77840, per=100.00%, avg=70351.27, 
stdev=4783.25
     lat (usec) : 100=0.01%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.53%
     lat (msec) : 2=85.02%, 4=14.31%, 10=0.13%
   cpu          : usr=1.96%, sys=6.71%, ctx=22791, majf=0, minf=133
   IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, 
 >=64=0.0%
      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, 
 >=64=0.0%
      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.1%, 64=0.0%, 
 >=64=0.0%
      issued    : total=r=0/w=527487/d=0, short=r=0/w=0/d=0

Run status group 0 (all jobs):
   WRITE: io=2060.6MB, aggrb=70329KB/s, minb=70329KB/s, maxb=70329KB/s, 
mint=30001msec, maxt=30001msec

Disk stats (read/write):
   sdb: ios=166/526079, merge=0/0, ticks=24/890120, in_queue=890064, 
util=98.73%

firefly:

file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=32
2.0.8
Starting 1 thread
Jobs: 1 (f=1): [w] [100.0% done] [0K/69096K /s] [0 /17.3K iops] [eta 
00m:00s]
file1: (groupid=0, jobs=1): err= 0: pid=2982
   write: io=1784.9MB, bw=60918KB/s, iops=15229 , runt= 30002msec
     slat (usec): min=1 , max=1389 , avg= 3.43, stdev= 5.32
     clat (usec): min=117 , max=8235 , avg=2096.88, stdev=396.30
      lat (usec): min=540 , max=8258 , avg=2100.43, stdev=396.61
     clat percentiles (usec):
      |  1.00th=[ 1608],  5.00th=[ 1720], 10.00th=[ 1768], 20.00th=[ 1832],
      | 30.00th=[ 1896], 40.00th=[ 1944], 50.00th=[ 2008], 60.00th=[ 2064],
      | 70.00th=[ 2160], 80.00th=[ 2256], 90.00th=[ 2512], 95.00th=[ 2896],
      | 99.00th=[ 3600], 99.50th=[ 3792], 99.90th=[ 5088], 99.95th=[ 6304],
      | 99.99th=[ 6752]
     bw (KB/s)  : min=36717, max=73712, per=99.94%, avg=60879.92, 
stdev=8302.27
     lat (usec) : 250=0.01%, 750=0.01%
     lat (msec) : 2=48.56%, 4=51.18%, 10=0.26%
   cpu          : usr=2.03%, sys=5.48%, ctx=20440, majf=0, minf=133
   IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, 
 >=64=0.0%
      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, 
 >=64=0.0%
      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.1%, 64=0.0%, 
 >=64=0.0%
      issued    : total=r=0/w=456918/d=0, short=r=0/w=0/d=0

Run status group 0 (all jobs):
   WRITE: io=1784.9MB, aggrb=60918KB/s, minb=60918KB/s, maxb=60918KB/s, 
mint=30002msec, maxt=30002msec

Disk stats (read/write):
   sdb: ios=166/455574, merge=0/0, ticks=12/897748, in_queue=897696, 
util=98.96%

Stefan

> Mark
>
>>
>> Stefan
>> --
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