Your message dated Thu, 20 Feb 2025 12:14:32 +0100 (CET) with message-id <20250220111432.070c1be2...@eldamar.lan> and subject line Closing this bug (BTS maintenance for src:linux bugs) has caused the Debian Bug report #900461, regarding Ping latency outliers using SRIOV network card to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact ow...@bugs.debian.org immediately.) -- 900461: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900461 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
--- Begin Message ---Package: kernel Version: Host(Debian 9.4):4.9.0-6-amd64 #1 SMP Debian 4.9.82-1+deb9u3 (2018-03-02) x86_64 GNU/Linux, Guest(Debian 9.1): 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u2 (2017-06-26) x86_64 GNU/Linux We have tested in two Debian 9.3 host. Each host has one 82599 network card, we linked these card physically by wire and then passthrough them to one VM (By VFIO) in corresponding host. VM's operating system is Debian 9.1. We config the ip for each VM, one is 192.168.0.1 and the other is 192.168.0.2. On 192.168.0.1 we run below command: ping 192.168.0.2 -i 0.01 | perl -nle 'BEGIN {$|++} print scalar(localtime),"", $_'> outputfile_0530 & After a night we got several outliers from the ping results. Below shows this. As we can see, almost ping latency is 0.0xxms, but the outliers become 15/16ms. We have see this phenomenon for several combination of host and guest(all host is debian). And also guest uses the VF. Also with the x710 network card. There is no latency outliers by using centos 7.3 as the host. So I think there maybe a bug in Debian system or something wrong in our environment. So could anyone reproduce this or give some hints about this? Thanks, Li Qiang
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--- Begin Message ---Hi This bug was filed for a very old kernel or the bug is old itself without resolution. If you can reproduce it with - the current version in unstable/testing - the latest kernel from backports please reopen the bug, see https://www.debian.org/Bugs/server-control for details. Regards, Salvatore
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