neal--
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BBR requires pacing. The Linux fq_codel qdisc does not implement pacing, so fq_codel would not be sufficient.
So the note in the tcp_bbr.c code is still current and complete:
NOTE: BBR *must* be used with the fq qdisc ("man tc-fq") with pacing enabled,
since pacing is integral to the BBR design and implementation.
BBR without pacing would not function properly, and may incur unnecessary
high packet loss rates.neal
On Mon, Jan 16, 2017 at 2:18 AM, <naner...@gmail.com> wrote:
I know in the README, BBR team suggests fq, but does using fq_codel has any negative impact?Thanks,Eric
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BBR requires pacing. The Linux fq_codel qdisc does not implement pacing, so fq_codel would not be sufficient.
On Mon, Jan 16, 2017 at 9:42 AM, 'Neal Cardwell' via BBR Development <bbr...@googlegroups.com> wrote:BBR requires pacing. The Linux fq_codel qdisc does not implement pacing, so fq_codel would not be sufficient.Patches gratefully accepted. Also, there is a new qdisc based on fq_codel called "cake" that could use pacing, that is particularly useful at the edge of the network. And the new code for WiFi that is showing stunning results could also use pacing magic, I expect.The network you may improve may be close to home ;-).- Jim
So the note in the tcp_bbr.c code is still current and complete:
NOTE: BBR *must* be used with the fq qdisc ("man tc-fq") with pacing enabled,
since pacing is integral to the BBR design and implementation.
BBR without pacing would not function properly, and may incur unnecessary
high packet loss rates.neal
On Mon, Jan 16, 2017 at 2:18 AM, <naner...@gmail.com> wrote:
I know in the README, BBR team suggests fq, but does using fq_codel has any negative impact?Thanks,Eric
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