Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.debian.kernel > #63838
| Path | csiph.com!weretis.net!feeder7.news.weretis.net!news.mixmin.net!aioe.org!bofh.it!news.nic.it!robomod |
|---|---|
| From | Bastian Blank <waldi@debian.org> |
| Newsgroups | linux.debian.bugs.dist, linux.debian.kernel |
| Subject | Bug#926967: Don't recommend irqbalance (was: Re: Handling irqbalance in virtual environments) |
| Date | Fri, 12 Apr 2019 23:10:02 +0200 |
| Message-ID | <xMbAS-KD-11@gated-at.bofh.it> (permalink) |
| References | <xMaOt-ce-5@gated-at.bofh.it> |
| X-Mailbox-Line | From debian-bugs-dist-request@lists.debian.org Fri Apr 12 21:00:10 2019 |
| Old-Return-Path | <debbugs@buxtehude.debian.org> |
| X-Spam-Flag | NO |
| X-Spam-Score | -4.2 |
| Reply-To | Bastian Blank <waldi@debian.org>, 926967@bugs.debian.org |
| Resent-To | debian-bugs-dist@lists.debian.org |
| Resent-Cc | debian-cloud@lists.debian.org, debian-kernel@lists.debian.org, Debian Kernel Team <debian-kernel@lists.debian.org> |
| X-Debian-Pr-Message | report 926967 |
| X-Debian-Pr-Package | src:linux |
| X-Debian-Pr-Source | linux |
| X-Spam-Bayes | score:0.0000 Tokens: new, 41; hammy, 150; neutral, 60; spammy, 0. spammytokens: hammytokens:0.000-+--H*UA:NeoMutt, 0.000-+--H*u:NeoMutt, 0.000-+--H*UA:1.7.2, 0.000-+--H*u:1.7.2, 0.000-+--H*UA:20170113 |
| MIME-Version | 1.0 |
| Content-Type | text/plain; charset=utf-8 |
| Content-Disposition | inline |
| User-Agent | NeoMutt/20170113 (1.7.2) |
| X-Greylist | delayed 108711 seconds by postgrey-1.36 at buxtehude; Fri, 12 Apr 2019 20:56:34 UTC |
| X-Debian-Message | from BTS |
| X-Mailing-List | <debian-bugs-dist@lists.debian.org> archive/latest/1532434 |
| List-ID | <debian-bugs-dist.lists.debian.org> |
| List-URL | <https://lists.debian.org/debian-bugs-dist/> |
| Approved | robomod@news.nic.it |
| Lines | 39 |
| Organization | linux.* mail to news gateway |
| Sender | robomod@news.nic.it |
| X-Original-Date | Fri, 12 Apr 2019 22:56:29 +0200 |
| X-Original-Message-ID | <20190412205629.unlrvsht2rpbsdqi@shell.thinkmo.de> |
| X-Original-References | <b4bf0b7cf7156696fa77ce1ec4004bfb97ffce60.camel@decadent.org.uk> |
| Xref | csiph.com linux.debian.bugs.dist:954120 linux.debian.kernel:63838 |
Cross-posted to 2 groups.
Show key headers only | View raw
Package: src:linux Version: 4.19.28-2 Severity: important On Fri, Apr 12, 2019 at 09:10:32PM +0100, Ben Hutchings wrote: > On Fri, 2019-04-12 at 10:53 +0200, Bastian Blank wrote: > > It turns out we got again problems with irqbalance. > > > > It was added as recommends of the main image in 3.16, as it was reported > > that older kernels move all interrupts to CPU 0 without help.[1] > > > > In the meantime the kernel can do balancing on it's own. In 4.9, I've > > seen it working with aacraid, each queue gets hard pinned to it's own > > CPU from 0 to $NRCPUS. In 4.19 I've seen the same working properly with > > virtio-net. > > > > With 4.19, even on real hardware, where interrupts have an affinity for > > all cpus, each interrupt is actually delivered to different cpu. > > > > Random example for this, it even selects only one thread of each core: > > > > > 26: 0 0 0 0 92 0 0 0 IR-PCI-MSI 3670017-edge eno1-TxRx-0 > > > 27: 0 0 0 0 0 167 0 0 IR-PCI-MSI 3670018-edge eno1-TxRx-1 > > > 28: 0 0 0 0 0 0 467 0 IR-PCI-MSI 3670019-edge eno1-TxRx-2 > > > 29: 0 0 0 0 0 0 0 454 IR-PCI-MSI 3670020-edge eno1-TxRx-3 > > > > Now irqbalance comes to re-do the existing pinning, and the result is not > > longer correct but $RANDOM for the hard queue-to-cpu case of virtio. > > Then let's drop the recommendation. Okay. Regards, Bastian -- I'm a soldier, not a diplomat. I can only tell the truth. -- Kirk, "Errand of Mercy", stardate 3198.9
Back to linux.debian.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Handling irqbalance in virtual environments Bastian Blank <waldi@debian.org> - 2019-04-12 11:10 +0200
Re: Handling irqbalance in virtual environments Bastian Blank <waldi@debian.org> - 2019-04-12 11:40 +0200
Re: Handling irqbalance in virtual environments Ben Hutchings <ben@decadent.org.uk> - 2019-04-12 22:20 +0200
Bug#926967: Don't recommend irqbalance (was: Re: Handling irqbalance in virtual environments) Bastian Blank <waldi@debian.org> - 2019-04-12 23:10 +0200
Bug#926967: Don't recommend irqbalance (was: Re: Handling irqbalance in virtual environments) Nicholas D Steeves <nsteeves@gmail.com> - 2019-04-15 01:00 +0200
Bug#926967: Don't recommend irqbalance (was: Re: Handling irqbalance in virtual environments) Bastian Blank <waldi@debian.org> - 2019-04-23 21:50 +0200
Processed: Re: Bug#926967: Don't recommend irqbalance (was: Re: Handling irqbalance in virtual environments) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2019-04-23 21:50 +0200
csiph-web