Basic performance testing for dbus signals

1. Copy the configuration file to allow service to be run on the system bus

• # cp org.fubar.signal1.conf /etc/dbus-1/system.d/

2. Build the C version

• # ./build.sh

3. Run the test service

• # ./spamsignals server

4. Run the test client

• # ./spamsignals client

5. Run the testcase

• # python test.py

6. Look at stdout from test client

32,0.000032,53504.235126,1.632820, 10000
64,0.000031,53895.914153,3.289546, 10000
128,0.000032,54784.320333,6.687539, 10000
256,0.000032,54166.180231,13.224165, 10000
512,0.000033,52019.149200,25.399975, 10000
1024,0.000033,53904.849543,52.641455, 10000
2048,0.000141,52412.028151,102.367242, 10000
4096,0.007057,33988.447544,132.767373, 6243
8192,0.012978,19174.779152,149.802962, 3563
16384,0.016047,10207.838931,159.497483, 1936
32768,0.015827,5245.088101,163.909003, 1158
65536,0.015932,2635.173577,164.698349, 756
131072,0.015743,1333.503221,166.687903, 984

Columns are: payload byte size, average diff time, messages/sec, MiB/sec, Number of signals received

• To run python server/client verson change ./spamsignals to ./spamsignals.py
• To enable kdbus, append kdbus=1 to kernel command line while having the kdbus kernel module located somewhere where is can be found, like: /lib/modules/`uname -r`/kernel/ipc/kdbus/