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Bug #153

batctl gw server throughput low

Added by TY Wu almost 10 years ago. Updated over 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Target version:
Start date:
09/01/2011
Due date:
% Done:

0%

Estimated time:

Description

Hi, I am using batman-advanced with openwrt. In version 2011.2, throughput from server to client or client to server is OK. But in version 2011.3, throughput from server to client and client to server becomes very low. Just wondering, is there any traffic control limiting the throughput? When I change the server to client/off using "batctl gw off" or "batctl gw client", the throughput is OK.


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History

#1

Updated by Anonymous almost 10 years ago

  • Project changed from batctl to batman-adv
#2

Updated by Anonymous almost 10 years ago

There is no traffic control. The gateway setting should only change the path selection of dhcp request packets. So it is not directly connected with the traffic that is actually send between the gateway and the client.

Can you please give more information about the topology, hardware and the methods/tools you used for the measurements.

The only changes regarding the gateway selection in 2011.3.0 is the uevent patch [1], the filter of incoming dhcp request [2] and gw refactoring [3] from ordex. It is possible that the second one is highly inefficient and uses too much cpu on you (low end?) nodes. Can you please try to revert this patch and test again?

[1] https://git.open-mesh.org/?p=batman-adv.git;a=commit;h=c7922649c3d888c52eefa7c034abe60fd6c33b4f
[2] https://git.open-mesh.org/?p=batman-adv.git;a=commit;h=17852faeb269bc72f6ff542e21c0b3056fb99c48
[3] https://git.open-mesh.org/?p=batman-adv.git;a=commit;h=6a17ecc4603be7f065c38b288d038a0082bbf21d

#3

Updated by TY Wu almost 10 years ago

I am using a AR7240-based (400MHz) boards. What I have done is to connect 2 of these boards together on the Ethernet port. When I ping from one board to the other, when I set to off/client, the ping has very low latency. When I change to server, the latency increased by a lot. I used the ath9k on this boards using wireless drivers, and the results all point towards that the server is having some issues.

I tried the patch, and it works now. Does it mean that one of the 3 changes is causing the problems? Do you think the one that you mentioned is highly inefficient is causing the problems?

#4

Updated by Anonymous almost 10 years ago

Could you please give infos what "low" or "a lot" means (please provide comparison values). And the patch only reverts the gateway filter change [1]. It depends on your data how we proceed.

But thanks a lot for your testing and the report.

[1] https://git.open-mesh.org/?p=batman-adv.git;a=commit;h=17852faeb269bc72f6ff542e21c0b3056fb99c48

#5

Updated by TY Wu almost 10 years ago

Hi, no problem for the testing. :)

As for the comparison values, I set up my 2 AR7240 devices and have them ping to each other on the LAN ports. I make sure that batman advanced is running on the LAN ports by using batctl commands.

AR7240_1(client) ping to AR7240_1 (gw=off) , the latency is 0.3ms.

Then I change the gw to server:

AR7240_1(client) ping to AR7240_1 (gw=off) , the latency is between 0.6ms to 10ms, keeps fluctuating.

If I used your patch, the latency is 0.3ms for both tests. Do let me know if you require more information.

#6

Updated by TY Wu almost 10 years ago

Sorry, edit some things, as I wrote something wrongly.

TY Wu wrote:

Hi, no problem for the testing. :)

As for the comparison values, I set up my 2 AR7240 devices and have them ping to each other on the LAN ports. I make sure that batman advanced is running on the LAN ports by using batctl commands.

AR7240_1(client) ping to AR7240_1 (gw=off) , the latency is 0.3ms.

Then I change the gw to server:

AR7240_1(client) ping to AR7240_1 (gw=server) , the latency is between 0.6ms to 10ms, keeps fluctuating.

If I used your patch, the latency is 0.3ms for both tests. Do let me know if you require more information.

#7

Updated by Marek Lindner almost 10 years ago

After running some tests I can confirm the issue. The latency goes up by a factor of 4-5.

#8

Updated by Marek Lindner almost 10 years ago

I developed a patch which keeps the current functionality and reduces the delay. Could you please test it at your end ? You have to remove all other patches to ensure this one applies cleanly.

#9

Updated by TY Wu almost 10 years ago

Hi, it is working now on my side. Thanks a lot!

#10

Updated by Marek Lindner almost 10 years ago

Just to be sure: You removed all of Sven's patches and applied mine instead ? Then it worked fine ?

Thanks for testing!

#11

Updated by TY Wu almost 10 years ago

Yes, I removed all of Swen's patches and applied yours. It is working fine on my side. =)

#12

Updated by Antonio Quartulli almost 10 years ago

  • File 0001-batman-adv-do_bcast-has-to-be-true-for-broadcast-pac.patch added

I would like to propose another test. Could you please apply the attached patch on top of the clean master branch? (no marek's or sven's patch on it) and then perform again the same tests, please :-)

#13

Updated by Antonio Quartulli almost 10 years ago

  • File deleted (0001-batman-adv-do_bcast-has-to-be-true-for-broadcast-pac.patch)
#15

Updated by Marek Lindner almost 10 years ago

  • Status changed from New to Resolved

We can close the ticket as the patch has been included into the various repositories.

Thanks for reporting!

#16

Updated by Simon Wunderlich over 9 years ago

  • Status changed from Resolved to Closed
#17

Updated by Sven Eckelmann over 4 years ago

  • Target version set to 2011.3.1

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