SocketCAN and Incoming Packet Control
I have an application for linux. I am using SocketCAN to talk to the CAN bus. We are doing this on a Beaglebone Black based device we made ourselves.
We have another device we need to listen to traffic from. This device sends a ton of data way faster than we need it or can process it.
I am trying to figure out a good way to slow down the traffic coming from this device to ours over CAN.
I found the document that talks about using traffic control (tc) for linux. I have been trying the examples and not seeing any difference in the incoming traffic.
Everything I have read about this gives examples about limiting the OUTBOUND traffic from an app to the CAN bus.
My question is whether traffic control (tc) can be used to limit incoming traffic to the kernel (and the apps that are listening)?
If not, then is there another tool that can be used for this?
I am ok dropping a percentage of packets. I assume that would have to happen.
linux limit traffic can-bus socketcan
asked Nov 14 '18 at 18:01
user856232user856232
4231526
add a comment |
I have an application for linux. I am using SocketCAN to talk to the CAN bus. We are doing this on a Beaglebone Black based device we made ourselves.
We have another device we need to listen to traffic from. This device sends a ton of data way faster than we need it or can process it.
I am trying to figure out a good way to slow down the traffic coming from this device to ours over CAN.
I found the document that talks about using traffic control (tc) for linux. I have been trying the examples and not seeing any difference in the incoming traffic.
Everything I have read about this gives examples about limiting the OUTBOUND traffic from an app to the CAN bus.
My question is whether traffic control (tc) can be used to limit incoming traffic to the kernel (and the apps that are listening)?
If not, then is there another tool that can be used for this?
I am ok dropping a percentage of packets. I assume that would have to happen.
linux limit traffic can-bus socketcan
asked Nov 14 '18 at 18:01
user856232user856232
4231526
I see that someone down voted this question, but didn't leave a comment as to what they didn't like about the question. When I hover over the down vote arrow, the tool tip says "This question does not show any research effort; it is unclear or not useful". I did lots of research. I read the documentation on TC. I read an article about using TC for SocketCAN. All of the information I read implied, but was not clear about whether TC works on incoming data as well as outgoing. That is why i am asking. If the person who down voted could comment on why I would appreciate it.
– user856232
Nov 16 '18 at 19:36
What about using SocketCAN filter to let only required frames through?
– yegorich
Nov 19 '18 at 11:32
I am already using those filters and still my app is getting slammed with data. The data is coming in as 104 values all coming every 16ms. Even after filtering down to about 15 values (which is a minimum of what I need) the CAN interrupt is still taking 20% of the processor. Basically I just need to drop a bunch of packets to make it manageable. Since I have no control over the sending device, I have to be able to drop packets.
– user856232
Nov 19 '18 at 15:08
I see. Then I suggest to ask this question on linux-can mailing list.
– yegorich
Nov 19 '18 at 20:38
I will give that a try. Thanks.
– user856232
Nov 20 '18 at 0:36
add a comment |
I have an application for linux. I am using SocketCAN to talk to the CAN bus. We are doing this on a Beaglebone Black based device we made ourselves.
We have another device we need to listen to traffic from. This device sends a ton of data way faster than we need it or can process it.
I am trying to figure out a good way to slow down the traffic coming from this device to ours over CAN.
I found the document that talks about using traffic control (tc) for linux. I have been trying the examples and not seeing any difference in the incoming traffic.
Everything I have read about this gives examples about limiting the OUTBOUND traffic from an app to the CAN bus.
My question is whether traffic control (tc) can be used to limit incoming traffic to the kernel (and the apps that are listening)?
If not, then is there another tool that can be used for this?
I am ok dropping a percentage of packets. I assume that would have to happen.
linux limit traffic can-bus socketcan
asked Nov 14 '18 at 18:01
user856232user856232
4231526
I have an application for linux. I am using SocketCAN to talk to the CAN bus. We are doing this on a Beaglebone Black based device we made ourselves.
We have another device we need to listen to traffic from. This device sends a ton of data way faster than we need it or can process it.
I am trying to figure out a good way to slow down the traffic coming from this device to ours over CAN.
I found the document that talks about using traffic control (tc) for linux. I have been trying the examples and not seeing any difference in the incoming traffic.
Everything I have read about this gives examples about limiting the OUTBOUND traffic from an app to the CAN bus.
My question is whether traffic control (tc) can be used to limit incoming traffic to the kernel (and the apps that are listening)?
If not, then is there another tool that can be used for this?
I am ok dropping a percentage of packets. I assume that would have to happen.
linux limit traffic can-bus socketcan
linux limit traffic can-bus socketcan
asked Nov 14 '18 at 18:01
user856232user856232
4231526
asked Nov 14 '18 at 18:01
user856232user856232
4231526
asked Nov 14 '18 at 18:01
user856232user856232
4231526
asked Nov 14 '18 at 18:01
user856232user856232
4231526
asked Nov 14 '18 at 18:01
user856232user856232
4231526
4231526
I see that someone down voted this question, but didn't leave a comment as to what they didn't like about the question. When I hover over the down vote arrow, the tool tip says "This question does not show any research effort; it is unclear or not useful". I did lots of research. I read the documentation on TC. I read an article about using TC for SocketCAN. All of the information I read implied, but was not clear about whether TC works on incoming data as well as outgoing. That is why i am asking. If the person who down voted could comment on why I would appreciate it.
– user856232
Nov 16 '18 at 19:36
What about using SocketCAN filter to let only required frames through?
– yegorich
Nov 19 '18 at 11:32
I am already using those filters and still my app is getting slammed with data. The data is coming in as 104 values all coming every 16ms. Even after filtering down to about 15 values (which is a minimum of what I need) the CAN interrupt is still taking 20% of the processor. Basically I just need to drop a bunch of packets to make it manageable. Since I have no control over the sending device, I have to be able to drop packets.
– user856232
Nov 19 '18 at 15:08
I see. Then I suggest to ask this question on linux-can mailing list.
– yegorich
Nov 19 '18 at 20:38
I will give that a try. Thanks.
– user856232
Nov 20 '18 at 0:36
add a comment |
I see that someone down voted this question, but didn't leave a comment as to what they didn't like about the question. When I hover over the down vote arrow, the tool tip says "This question does not show any research effort; it is unclear or not useful". I did lots of research. I read the documentation on TC. I read an article about using TC for SocketCAN. All of the information I read implied, but was not clear about whether TC works on incoming data as well as outgoing. That is why i am asking. If the person who down voted could comment on why I would appreciate it.
– user856232
Nov 16 '18 at 19:36
What about using SocketCAN filter to let only required frames through?
– yegorich
Nov 19 '18 at 11:32
I am already using those filters and still my app is getting slammed with data. The data is coming in as 104 values all coming every 16ms. Even after filtering down to about 15 values (which is a minimum of what I need) the CAN interrupt is still taking 20% of the processor. Basically I just need to drop a bunch of packets to make it manageable. Since I have no control over the sending device, I have to be able to drop packets.
– user856232
Nov 19 '18 at 15:08
I see. Then I suggest to ask this question on linux-can mailing list.
– yegorich
Nov 19 '18 at 20:38
I will give that a try. Thanks.
– user856232
Nov 20 '18 at 0:36
I see that someone down voted this question, but didn't leave a comment as to what they didn't like about the question. When I hover over the down vote arrow, the tool tip says "This question does not show any research effort; it is unclear or not useful". I did lots of research. I read the documentation on TC. I read an article about using TC for SocketCAN. All of the information I read implied, but was not clear about whether TC works on incoming data as well as outgoing. That is why i am asking. If the person who down voted could comment on why I would appreciate it.
– user856232
Nov 16 '18 at 19:36
I see that someone down voted this question, but didn't leave a comment as to what they didn't like about the question. When I hover over the down vote arrow, the tool tip says "This question does not show any research effort; it is unclear or not useful". I did lots of research. I read the documentation on TC. I read an article about using TC for SocketCAN. All of the information I read implied, but was not clear about whether TC works on incoming data as well as outgoing. That is why i am asking. If the person who down voted could comment on why I would appreciate it.
– user856232
Nov 16 '18 at 19:36
What about using SocketCAN filter to let only required frames through?
– yegorich
Nov 19 '18 at 11:32
What about using SocketCAN filter to let only required frames through?
– yegorich
Nov 19 '18 at 11:32
I am already using those filters and still my app is getting slammed with data. The data is coming in as 104 values all coming every 16ms. Even after filtering down to about 15 values (which is a minimum of what I need) the CAN interrupt is still taking 20% of the processor. Basically I just need to drop a bunch of packets to make it manageable. Since I have no control over the sending device, I have to be able to drop packets.
– user856232
Nov 19 '18 at 15:08
I am already using those filters and still my app is getting slammed with data. The data is coming in as 104 values all coming every 16ms. Even after filtering down to about 15 values (which is a minimum of what I need) the CAN interrupt is still taking 20% of the processor. Basically I just need to drop a bunch of packets to make it manageable. Since I have no control over the sending device, I have to be able to drop packets.
– user856232
Nov 19 '18 at 15:08
I see. Then I suggest to ask this question on linux-can mailing list.
– yegorich
Nov 19 '18 at 20:38
I see. Then I suggest to ask this question on linux-can mailing list.
– yegorich
Nov 19 '18 at 20:38
I will give that a try. Thanks.
– user856232
Nov 20 '18 at 0:36
I will give that a try. Thanks.
– user856232
Nov 20 '18 at 0:36
add a comment |
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I see that someone down voted this question, but didn't leave a comment as to what they didn't like about the question. When I hover over the down vote arrow, the tool tip says "This question does not show any research effort; it is unclear or not useful". I did lots of research. I read the documentation on TC. I read an article about using TC for SocketCAN. All of the information I read implied, but was not clear about whether TC works on incoming data as well as outgoing. That is why i am asking. If the person who down voted could comment on why I would appreciate it.
– user856232
Nov 16 '18 at 19:36
What about using SocketCAN filter to let only required frames through?
– yegorich
Nov 19 '18 at 11:32
I am already using those filters and still my app is getting slammed with data. The data is coming in as 104 values all coming every 16ms. Even after filtering down to about 15 values (which is a minimum of what I need) the CAN interrupt is still taking 20% of the processor. Basically I just need to drop a bunch of packets to make it manageable. Since I have no control over the sending device, I have to be able to drop packets.
– user856232
Nov 19 '18 at 15:08
I see. Then I suggest to ask this question on linux-can mailing list.
– yegorich
Nov 19 '18 at 20:38
I will give that a try. Thanks.
– user856232
Nov 20 '18 at 0:36