1.4.1. RTI Routing Service

The following tests have been performed by executing the RTI Perftest C++98 benchmark application between two nodes and RTI Routing Service in a third node, all of them connected to a switch via Ethernet. The communication has been restricted to a single interface, and the transport has been set to UDPv4 for the three applications.

In this test, communication between the RTI Perftest Publisher and Subscriber is not direct, all traffic is routed with Routing Service. The Publisher application sends the samples, which are received and routed using Routing Service to the Subscriber application. If the sample needs to be returned to the Publisher application, the Subscriber sends it back, again through Routing Service. The latency measured is half Round Trip Time (RTT).

Find information about the hardware, network, and command-line parameters after each of the tests.

1.4.1.1. UDPv4

Linux x64 (10Gbps Network)

UnkeyedKeyed

Minimum LatencyMaximum Throughput

The graph below shows the one-way latency without load between a Publisher, a Routing Service, and a Subscriber running in three Linux nodes in a 10Gbps network. The numbers are for best-effort as well as strict reliable reliability scenarios.

Note

We use the median (50th percentile) instead of the average in order to get a more stable measurement that does not account for spurious outliers. We also calculate the average value and other percentile values, which can be seen in the Detailed Statistics section below.

Detailed Statistics

The following tables contain the raw numbers presented by RTI Perftest. These numbers are the exact output with no further processing.

• Best Effort

Sample Size (Bytes)	Avg (μs)	Std (μs)	Min (μs)	Max (μs)	50% (μs)	90% (μs)	99% (μs)	99.99% (μs)	99.9999% (μs)	CPU (%)
32	44	18.8	38	9344	41	57	63	97	9344
64	45	20.7	38	9822	42	57	64	100	9822
128	45	17.2	38	8913	41	58	63	92	8913
512	47	20.0	40	9046	43	59	68	124	9046
1024	51	22.9	43	9217	47	62	78	99	9217
4096	60	5.6	55	120	57	66	83	114	120
8192	90	8.3	74	160	94	96	104	133	160
16384	195	42.3	95	330	192	247	295	322	330
32768	336	17.4	153	398	348	355	359	364	398
63000	376	6.0	218	446	376	379	384	400	446

• Reliable

Sample Size (Bytes)	Avg (μs)	Std (μs)	Min (μs)	Max (μs)	50% (μs)	90% (μs)	99% (μs)	99.99% (μs)	99.9999% (μs)	CPU (%)
32	45	8.9	36	133	40	60	63	70	133
64	45	9.0	36	121	41	60	63	70	121
128	46	8.2	36	91	43	60	62	69	91
512	46	357.6	38	100077	41	58	62	71	100077
1024	49	7.5	40	95	47	61	63	70	95
4096	58	1.8	55	125	58	61	63	75	125
8192	75	1.8	72	128	74	78	79	87	128
16384	189	30.2	99	346	186	214	336	342	346
32768	347	9.9	139	396	350	352	354	364	396
63000	371	4.7	206	396	371	373	375	383	396

Test Hardware

The following hardware was used to perform these tests:

Linux Nodes

Dell R340 Servers (13 Units)
Processor: Intel Xeon E-2278G (3.4-5GHz, 8c/16t, 16MB cache, 2 memory channels @2666MHz)
RAM: 4x 16GB 2666MHz DIMM (64GB RAM)
HD: 480GB SATA SSD
NIC 1: Intel 710 dual port 10Gbps SFP
OS: Ubuntu 20.04 -- gcc 9.3.0

Switch

Dell 2048 -- 10Gbps switch (10Gbps and 1Gbps interfaces)