Anyone with 25G ethernet willing to do the test? Would love to see what the latency figures are for that. From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Maged Mokhtar
Sent: 22 January 2018 11:28
To: ceph-users@xxxxxxxxxxxxxx
Subject: Re: What is the should be the expected latency of 10Gbit network connections On 2018-01-22 08:39, Wido den Hollander wrote:
On 01/20/2018 02:02 PM, Marc Roos wrote:
If I test my connections with sockperf via a 1Gbit switch I get around
25usec, when I test the 10Gbit connection via the switch I have around
12usec is that normal? Or should there be a differnce of 10x.
No, that's normal.
Tests with 8k ping packets over different links I did:
1GbE: 0.800ms
10GbE: 0.200ms
40GbE: 0.150ms
Wido
sockperf ping-pong
sockperf: Warmup stage (sending a few dummy messages)...
sockperf: Starting test...
sockperf: Test end (interrupted by timer)
sockperf: Test ended
sockperf: [Total Run] RunTime=10.100 sec; SentMessages=432875;
ReceivedMessages=432874
sockperf: ========= Printing statistics for Server No: 0
sockperf: [Valid Duration] RunTime=10.000 sec; SentMessages=428640;
ReceivedMessages=428640
sockperf: ====> avg-lat= 11.609 (std-dev=1.684)
sockperf: # dropped messages = 0; # duplicated messages = 0; #
out-of-order messages = 0
sockperf: Summary: Latency is 11.609 usec
sockperf: Total 428640 observations; each percentile contains 4286.40
observations
sockperf: ---> <MAX> observation = 856.944
sockperf: ---> percentile 99.99 = 39.789
sockperf: ---> percentile 99.90 = 20.550
sockperf: ---> percentile 99.50 = 17.094
sockperf: ---> percentile 99.00 = 15.578
sockperf: ---> percentile 95.00 = 12.838
sockperf: ---> percentile 90.00 = 12.299
sockperf: ---> percentile 75.00 = 11.844
sockperf: ---> percentile 50.00 = 11.409
sockperf: ---> percentile 25.00 = 11.124
sockperf: ---> <MIN> observation = 8.888
sockperf: Warmup stage (sending a few dummy messages)...
sockperf: Starting test...
sockperf: Test end (interrupted by timer)
sockperf: Test ended
sockperf: [Total Run] RunTime=1.100 sec; SentMessages=22065;
ReceivedMessages=22064
sockperf: ========= Printing statistics for Server No: 0
sockperf: [Valid Duration] RunTime=1.000 sec; SentMessages=20056;
ReceivedMessages=20056
sockperf: ====> avg-lat= 24.861 (std-dev=1.774)
sockperf: # dropped messages = 0; # duplicated messages = 0; #
out-of-order messages = 0
sockperf: Summary: Latency is 24.861 usec
sockperf: Total 20056 observations; each percentile contains 200.56
observations
sockperf: ---> <MAX> observation = 77.158
sockperf: ---> percentile 99.99 = 54.285
sockperf: ---> percentile 99.90 = 37.864
sockperf: ---> percentile 99.50 = 34.406
sockperf: ---> percentile 99.00 = 33.337
sockperf: ---> percentile 95.00 = 27.497
sockperf: ---> percentile 90.00 = 26.072
sockperf: ---> percentile 75.00 = 24.618
sockperf: ---> percentile 50.00 = 24.443
sockperf: ---> percentile 25.00 = 24.361
sockperf: ---> <MIN> observation = 16.746
[root@c01 sbin]# sockperf ping-pong -i 192.168.0.12 -p 5001 -t 10
sockperf: == version #2.6 ==
sockperf[CLIENT] send on:sockperf: using recvfrom() to block on
socket(s)
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I find the ping command with flood option handy to measure latency, gives stats min/max/average/std deviation example: ping -c 100000 -f 10.0.1.12 Maged |
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