Hello Dave, or anyone else affected, Accepted procps into noble-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/procps/2:4.0.4-4ubuntu3.1 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- noble to verification-done-noble. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-noble. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to procps in Ubuntu. https://bugs.launchpad.net/bugs/2003027 Title: fq_codel qdisc compiled but not enabled on 22.10 Status in Ubuntu: Fix Released Status in procps package in Ubuntu: Fix Released Status in The Noble Numbat: Confirmed Status in procps source package in Noble: Fix Committed Status in The Oracular Oriole: Fix Released Status in procps source package in Oracular: Fix Released Bug description: [ Impact ] Starting with Ubuntu 22.10, the default qdisc regressed to pfifo_fast. This is due to a change we merged from Debian, removing systemd's /usr/lib/50-default.conf file. pfifo_fast does not prevent bufferbloat issues, severely degrading networking performance on Ubuntu systems. [ Test Plan ] On an Ubuntu VM, check that net.core.default_qdisc is set to 'fq_codel'. `tc qdisc show` should also confirm fq_codel is being used. halves@noble-vm:~$ sysctl net.core.default_qdisc net.core.default_qdisc = fq_codel halves@noble-vm:~$ tc qdisc show qdisc noqueue 0: dev lo root refcnt 2 qdisc mq 0: dev enp5s0 root qdisc fq_codel 0: dev enp5s0 parent :1 limit 10240p flows 1024 quantum 1514 target 5ms interval 100ms memory_limit 32Mb ecn drop_batch 64 [ Where Problems Could Occur ] Users relying on the default pfifo_fast qdisc could see different networking behavior. Although fq_codel should be an across-the-board improvement over pfifo_fast, we could monitor network latency stats and throughput to make sure no weird regressions arise from the qdisc scheduler. [ Other Info ] Instead of adding a sysctl.conf file, Debian has decided to change their default kernel configs to use fq_codel. This has the disadvantage of being "hidden" from end users, instead of being a queryable setting in e.g. /etc/sysctl.d/, and all kernel documentation still refers to pfifo_fast as being the default. Systemd's /usr/lib/50-default.conf file includes a lot of other settings that are either overruled elsewhere (e.g. from procps) or are entirely missing from our stable releases. Introducing a diff from Debian to ship this file only for the net.core.default_qdisc changes seems excessive, so having a dedicated place under procps where other similar toggles are already present seems like the more appropriate solution. -- [ Original Description ] fq_codel has been the default in ubuntu since #1436945 It is also now the default in debian. Somewhere between 22.04 and 22.10 though, it stopped being enabled by systemd? (it used to be enabled there via a sysctl), and thus 22.10 (I tried both ubuntu server and ubuntu studio) doesn't have it on. I rather *immediately* noticed this huge regression (I run my ethernet at 100Mbit, and thus immediately saw 400+ms latency) - and I hope it can be fixed in the next release? it can also be made the default via compiling it into the kernel as a kernel default. Aggh! death to fifos! root@localhost:~# sysctl -a | grep qdisc net.core.default_qdisc = pfifo_fast disc pfifo_fast 0: dev eth0 parent :1 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 Sent 5250 bytes 53 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2003027/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
