Hello Jana, I see the same message with BIRD 3.1.2, however on Red Hat Enterprise Linux 9.5:
Jun 2 15:42:09 bird[72494]: I/O loop cycle took 28009.143 ms for 10 events The message unfortunately leaves open for me whether this is bad or good or if I even need to worry. I did not see this in BIRD 2.16 before. I already provided my BIRD configuration related to the segmentation fault in 3.1.1 on Tue, 20 May 2025 17:14:33 +0200 (the segmentation fault from 3.1.1 seems to be gone with 3.1.2, even don't know which changelog entry is related to that - but thank you for fixing this!). Regards, Robert On Mon, 02 Jun 2025, Jana Babovakova via Bird-users wrote: > Hi Zhang, > > could you please provide us with more information about your situation? > Could you send us your configuration file? What does your routing table look > like? Are there any specific network events when BIRD complains? > > Happy routing, > Jana > > Jana Babovakova (she/her) | BIRD Tech Support | CZ.NIC, z.s.p.o. > > On 02. 06. 25 11:31, [email protected] wrote: > >bird 3.1.2 seems to be far better, but still about half minutes high CPU > >usage: > >6月 02 17:27:52 zx-router bird[2232668]: I/O loop cycle took 7108.812 ms for > >26 events > >6月 02 17:28:11 zx-router bird[2232668]: I/O loop cycle took 5419.657 ms for > >15 events > >6月 02 17:28:17 zx-router bird[2232668]: I/O loop cycle took 5445.657 ms for > >80 events > > > >it's still worse comparing with 2.16.2. > > > > > > > >Zhang Xun > > > >发件人：[email protected] > >发送时间： 2025-06-02 17:11 > >收件人： bird-users > >主题： [3.1.1 on EL8] CPU 100% with NetworkManager > >Hi there, > > > >When I upgrade bird from 2.16.2 to 3.1.1 today, it became unstable that it > >often causes CPU usage to 100% for bird, > >and later also for NetworkManager, and there are some notable syslogs: > > > >6月 02 16:04:28 zx-router bird[2197971]: I/O loop cycle took 14046.255 ms for > >43 events > >6月 02 16:04:48 zx-router bird[2197971]: I/O loop cycle took 15307.277 ms for > >42 events > >6月 02 16:04:57 zx-router bird[2197971]: I/O loop cycle took 8562.921 ms for > >43 events > >6月 02 16:05:16 zx-router bird[2197971]: I/O loop cycle took 9799.271 ms for > >85 events > >6月 02 16:05:25 zx-router bird[2197971]: I/O loop cycle took 9330.265 ms for > >80 events > >6月 02 16:05:30 zx-router bird[2197971]: I/O loop cycle took 5004.867 ms for > >44 events > >6月 02 16:06:09 zx-router bird[2197971]: I/O loop cycle took 38759.438 ms for > >84 events > >6月 02 16:06:17 zx-router bird[2197971]: I/O loop cycle took 5465.396 ms for > >6 events > >6月 02 16:06:23 zx-router bird[2197971]: I/O loop cycle took 5906.858 ms for > >44 events > >6月 02 16:06:37 zx-router bird[2197971]: I/O loop cycle took 12896.032 ms for > >9 events > >6月 02 16:06:56 zx-router bird[2197971]: I/O loop cycle took 8217.969 ms for > >81 events > >6月 02 16:07:08 zx-router bird[2197971]: I/O loop cycle took 9012.775 ms for > >25 events > >6月 02 16:07:26 zx-router bird[2197971]: I/O loop cycle took 11506.570 ms for > >45 events > >6月 02 16:07:56 zx-router bird[2197971]: I/O loop cycle took 30014.580 ms for > >85 events > >6月 02 16:08:05 zx-router bird[2197971]: I/O loop cycle took 6333.289 ms for > >6 events > >6月 02 16:08:14 zx-router bird[2197971]: I/O loop cycle took 8751.816 ms for > >42 events > >6月 02 16:08:29 zx-router bird[2197971]: I/O loop cycle took 13017.064 ms for > >46 events > >6月 02 16:08:51 zx-router bird[2197971]: I/O loop cycle took 13223.357 ms for > >80 events > >6月 02 16:09:44 zx-router bird[2197971]: I/O loop cycle took 17730.328 ms for > >5 events > >6月 02 16:10:37 zx-router bird[2197971]: I/O loop cycle took 8061.950 ms for > >8 events > >6月 02 16:10:46 zx-router bird[2197971]: I/O loop cycle took 9008.065 ms for > >65 events > >6月 02 16:10:54 zx-router bird[2197971]: I/O loop cycle took 6035.965 ms for > >4 events > >6月 02 16:11:03 zx-router bird[2197971]: I/O loop cycle took 9959.243 ms for > >67 events > > > >I'm exporting full table to kernel with NetworkManager running on RHEL8 > >related systems (CentOS/Alma/Rocky 8). > >There is no problem before upgrading.
