Performance measurements#

The following table shows latencies for a 1:1 publish/subscribe connection for different payload sizes (the processes are running on the same host). You can measure those latencies on your own computer by running the ecal_sample_latency_snd and ecal_sample_latency_rec sample applications.

  1. Start ecal_sample_latency_rec . This application will receive the published payloads, print out the number of the received messages, the latencies and the data throughputs.

  2. Start ecal_sample_latency_snd . This application will publish the payloads and can be configured via command line parameter:

ecal_sample_latency_snd [-z] [-s <int>] [-r <int>] [-b <int>] [--]

Where:
   -z,  --zero_copy
     Switch zero copy mode on.

   -s <int>,  --size <int>
     Messages size in kB.

   -r <int>,  --runs <int>
     Number of messages to send.

   -b <int>,  --mem_buffer <int>
     Number of memory files per connection.

A message size -1 will run the tests over different message sizes in a range from 1kB to 32 MB.

The table shows the results for the Windows 10 and the Ubuntu 22.04 platform with and without zero copy mode (message size = -1 (1kB - 32MB), runs = 5000, message buffer = 1).

-------------------------------
 Platform
-------------------------------
System Manufacturer:     HP
System Model:            HP ZBook 15 G5
System Type:             x64-based PC
Processor(s):            1 Prozessor(s) Installed.
                         [01]: Intel64 Family 6 Model 158 Stepping 10 GenuineIntel ~2592 MHz
Total Physical Memory:   32.614 MB
Payload Size
Win10 AMD64
SHM
(µs)
Win10 AMD64
SHM ZC
(µs)
Ubuntu22 AMD64
SHM
(µs)
Ubuntu22 AMD64
SHM ZC
(µs)
1 kB
10
5
8
3
2 kB
10
5
8
3
4 kB
10
5
8
3
8 kB
11
5
10
3
16 kB
13
5
12
3
32 kB
13
5
14
3
64 kB
17
5
16
3
128 kB
23
5
28
3
256 kB
37
5
135
3
512 kB
64
5
158
3
1 MB
112
5
182
3
2 MB
344
5
316
3
4 MB
773
5
692
3
8 MB
1762
5
1542
3
16 MB
3458
5
2998
3
32 MB
6642
5
5880
3