请问分布式系统的Continental eCAL with protobuf 该怎么使用

[zqlibo]

我在局域网中的两台电脑上部署了代码，怎么才能测试UDP模式下的传输性能？

使用以下指令 只能在本地模式运行，两台电脑无法测试。

t1

./install/performance_test/lib/performance_test/perf_test -c ECAL_PROTO --msg Array1k -p 0 -s 1

t2

./install/performance_test/lib/performance_test/perf_test -c ECAL_PROTO --msg Array1k -p 1 -s 0

[ZhenshengLee]

跨主机通信的测试方法，参考readme

performance_test/README.md

Lines 295 to 310 in 7ce2c8e

	On a distributed system, testing latency is difficult, because the clocks are probably not
	perfectly synchronized between the two devices. To work around this, the performance_test tool
	supports relay mode, which allows for a round-trip style of communication:
	```bash
	# On the main machine
	perf_test <options> --roundtrip-mode Main
	# On the relay machine:
	perf_test <options> --roundtrip-mode Relay
	```
	In relay mode, the Main machine sends messages to the Relay machine, which immediately sends the
	messages back. The Main machine receives the relayed message, and reports the round-trip latency.
	Therefore, the reported latency will be roughly double the latency compared to the latency reported
	in non-relay mode.

By default, eCAL is configured in local mode. To switch eCAL to cloud mode, edit your ecal.ini and change the following settings:

还取决于eCAL是否启用了跨主机通信，从5.10版本开始，跨主机网络通信默认是关闭的，参考
https://eclipse-ecal.github.io/ecal/getting_started/cloud.html#enable-network-mode-in-ecal-ini

如果喜欢本仓库，请star，谢谢！

[zqlibo]

您好 还是想咨询下我的eCAL改了网络配置后测试代码还是无法使用，我的eCAL版本为5.10.3
我的本地ecal.ini 配置如下
[network] network_enabled = true multicast_group = 239.0.0.1 multicast_mask = 0.0.0.15 multicast_port = 14000 multicast_ttl = 2 multicast_sndbuf = 5242880 multicast_rcvbuf = 5242880

Host1 和Host2 之间用ecal_sample_person_snd 和 ecal_sample_person_rec 测试是可以通信的。

我的测试指令如下：
Host1
./install/performance_test/lib/performance_test/perf_test -c ECAL_PROTO --msg Array1k -p 0 -s 1 --roundtrip-mode Relay
Host2
./install/performance_test/lib/performance_test/perf_test -c ECAL_PROTO --msg Array1k -p 1 -s 0 --roundtrip-mode Main

执行后在Host1中samples recv 为一直0，请问还是有哪里没有配置正确吗？
期待您的回复，感谢！

[ZhenshengLee]

我的本地ecal.ini 配置如下
[network] network_enabled = true multicast_group = 239.0.0.1 multicast_mask = 0.0.0.15 multicast_port = 14000 multicast_ttl = 2 multicast_sndbuf = 5242880 multicast_rcvbuf = 5242880

配置没问题

Host1 和Host2 之间用ecal_sample_person_snd 和 ecal_sample_person_rec 测试是可以通信的。

先测试sample的思路是正确的

我的测试指令如下： Host1 ./install/performance_test/lib/performance_test/perf_test -c ECAL_PROTO --msg Array1k -p 0 -s 1 --roundtrip-mode Relay Host2 ./install/performance_test/lib/performance_test/perf_test -c ECAL_PROTO --msg Array1k -p 1 -s 0 --roundtrip-mode Main

执行后在Host1中samples recv 为一直0，请问还是有哪里没有配置正确吗？

我添加eCAL支持的时候没测试过这个命令，所以不确定该功能是否开发完成

你这边测试有问题，我会找个时间复现下这个故障

建议你先测试其他中间件plugin，比如FastRTPS的这个，这个是原生的, Apex.ai开发的

Apex.ai的原始库也更新了，你也可以下载原始库测试下，https://gitlab.com/ApexAI/performance_test

谢谢！

[zqlibo]

您好，我发现在eCAL protobuf或者FastDDS进行跨主机通信测试中， 加上中继模式的参数后，接收端的samples中recv 一直为0 ，不加下面的参数可以进行跨主机通信，并且samples中recv可以显示，请问这个是什么原因呢？

# On the main machine 
perf_test <options> --roundtrip-mode Main 
 
# On the relay machine: 
perf_test <options> --roundtrip-mode Relay 

[ZhenshengLee]

您好，我发现在eCAL protobuf或者FastDDS进行跨主机通信测试中， 加上中继模式的参数后，接收端的samples中recv 一直为0

this has been confirmed in the branch of legacy/foxy and should happen in all outdoor/* branch.

[ZhenshengLee]

不加下面的参数可以进行跨主机通信，并且samples中recv可以显示

That's been confirmed in all branches, and can be used to test the packet lost experiment.