So it turns out this is a related to the following reported issue, and it affects both 7.2 and 7.3 stable.
https://marc.info/?l=openbsd-bugs&m=167322442003896&w=2 I have a Protectli FW4B and used it as my home router/firewall, so there is no monitor connected to the HDMI port. When I connect an HDMI cable from the FW4B to my monitor, these network delays disappear. Oddly, when this issue was present, I could see pflogd CPU hovering at over 8% CPU constantly. After connecting the HDMI cable, pflogd is not breaking a sweat. Cheers, -Chris On Thu, Apr 13, 2023, at 4:36 PM, Chris Jones wrote: > Sorry, I forgot to add a subject to my initial sendbug. Hopefully this > updates the thread to give some insight as to what the bug report is about. > > > Cheers, > -C > > On 12 Apr 2023, at 18:00, Chris Jones wrote: > >>> >>> Synopsis: Experiencing frequent but intermittent network delays for host >>> bound and transit traffic on my OpenBSD router/firewall after upgrading >>> from 7.2 to 7.3 >>> Category: system kernel amd64 Environment: >>> >> >> System : OpenBSD 7.3 >> Details : OpenBSD 7.3 (GENERIC.MP) #1125: Sat Mar 25 10:36:29 MDT 2023 >> dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP >> >> `Architecture: OpenBSD.amd64 >> Machine : amd64 ` >>> Description: >>> >> I noticed that after upgrading from 7.2 to 7.3, frequent but intermittent >> network delays. These delays are very brief but when they happen they >> typically last from 500 - 900 ms. If I ping my gateway, I generally get sub >> millisecond pings (0.400 - 0.700 ms) but intermittently I'll get an echo >> replies (typically 1 echo reply) that can range from 200 - 900ms. Then it >> returns to the sub millisecond echo responses for a period of time (no >> pattern). Because these "delays" are noticable for both host bound traffic >> (eg. SSH to the OpenBSD router) and transit traffic, it affects persistent >> connections destined to the router or passing through it. >> >> `It's noticible for things like SSH sessions to the OpenBSD router, video >> and voice calls, or any other persistent connection. I've looked at the >> system processes to see if there are any noticable spikes in CPU usage, but >> I'm not seeing anything that stands out. >> >> I'm not noticing these same symptoms for other layer2 traffic. I can ping >> other hosts on my LAN and my switch and do not notice this behaviour, so >> it's only for connections to or transiting through the router. `
