5 ms·

How can we use it today! Is it in Linux code already and easy to enable ?

by skyde 9y ago

metafnord 9y ago
The code is already in net-next. This means you currently have to build your own kernel if you want to use it. This should be enough to get you going: https://github.com/google/bbr/blob/master/Documentation/bbr-quick-start.md https://github.com/google/bbr/blob/master/Documentation/bbr-...
lossolo 9y ago
It's in kernel 4.9
- ymse 9y ago
  https://github.com/torvalds/linux/commit/0f8782ea14974ce992618b55f0c041ef43ed0b78 https://github.com/torvalds/linux/commit/0f8782ea14974ce9926...
Scaevolus 9y ago
It's available in Ubuntu 17.04. Add these lines to /etc/sysctl.conf: net.core.default_qdisc=fq net.ipv4.tcp_congestion_control=bbr I got 400Mbps (on a 1Gbps link) from Seattle to New York with a single TCP-BBR stream, vs ~50Mbps before :-).
- newman314 9y ago
  How are you measuring this?
- otterley 9y ago
  You could probably saturate that link with a single TCP stream -- even without BBR -- by simply choosing the correct send and receive buffer sizes in your test program. (I assume you're using iperf or a similar program to perform your tests.) BBR and other congestion-control algorithms come into play when the underlying IP network is congested. To test them, you have to have control of the congestion rate of the underlying circuit, which you might not have if you're testing this on an ordinary public IP network.
- assafmo 9y ago
  Thank you! This is helpful also about fq vs fq_codel - https://groups.google.com/forum/m/#!topic/bbr-dev/4jL4ropdOV8 https://groups.google.com/forum/m/#!topic/bbr-dev/4jL4ropdOV...
  - assafmo 9y ago
    https://groups.google.com/d/topic/bbr-dev/4jL4ropdOV8 https://groups.google.com/d/topic/bbr-dev/4jL4ropdOV8
newman314 9y ago
To get this on Ubuntu 16.04 LTS, get and install the following: wget kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.26/linux-headers-4.9.26-040926_4.9.26-040926.201705031231_all.deb kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.26/linux-image-4.9.26-040926-generic_4.9.26-040926.201705031231_i386.deb kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.26/linux-image-4.9.26-040926-generic_4.9.26-040926.201705031231_amd64.deb sudo dpkg -i linux-headers-4.9*.deb linux-image-4.9*.deb

How can we use it today! Is it in Linux code already and easy to enable ?

by skyde 9y ago

How can we use it today! Is it in Linux code already and easy to enable ?

The code is already in net-next. This means you currently have to build your own kernel if you want to use it. This should be enough to get you going: https://github.com/google/bbr/blob/master/Documentation/bbr-quick-start.md https://github.com/google/bbr/blob/master/Documentation/bbr-...

lossolo 9y ago

It's in kernel 4.9

ymse 9y ago
https://github.com/torvalds/linux/commit/0f8782ea14974ce992618b55f0c041ef43ed0b78 https://github.com/torvalds/linux/commit/0f8782ea14974ce9926...

Scaevolus 9y ago

It's available in Ubuntu 17.04. Add these lines to /etc/sysctl.conf: net.core.default_qdisc=fq net.ipv4.tcp_congestion_control=bbr I got 400Mbps (on a 1Gbps link) from Seattle to New York with a single TCP-BBR stream, vs ~50Mbps before :-).

newman314 9y ago
How are you measuring this?
otterley 9y ago
You could probably saturate that link with a single TCP stream -- even without BBR -- by simply choosing the correct send and receive buffer sizes in your test program. (I assume you're using iperf or a similar program to perform your tests.) BBR and other congestion-control algorithms come into play when the underlying IP network is congested. To test them, you have to have control of the congestion rate of the underlying circuit, which you might not have if you're testing this on an ordinary public IP network.
assafmo 9y ago
Thank you! This is helpful also about fq vs fq_codel - https://groups.google.com/forum/m/#!topic/bbr-dev/4jL4ropdOV8 https://groups.google.com/forum/m/#!topic/bbr-dev/4jL4ropdOV...
- assafmo 9y ago
  https://groups.google.com/d/topic/bbr-dev/4jL4ropdOV8 https://groups.google.com/d/topic/bbr-dev/4jL4ropdOV8

newman314 9y ago

To get this on Ubuntu 16.04 LTS, get and install the following: wget kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.26/linux-headers-4.9.26-040926_4.9.26-040926.201705031231_all.deb kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.26/linux-image-4.9.26-040926-generic_4.9.26-040926.201705031231_i386.deb kernel.ubuntu.com/~kernel-ppa/mainline/v4.9.26/linux-image-4.9.26-040926-generic_4.9.26-040926.201705031231_amd64.deb sudo dpkg -i linux-headers-4.9*.deb linux-image-4.9*.deb