<![CDATA[Weird things that happen when you have a 100GbE pipe to your desk.]]>Weird things that happen when you have a 100GbE pipe to your desk. 8 Gbps of sustained network traffic and the network monitor is like "yeah you're not using much bandwidth"

Also I think there's a 32-bit overflow or something in xfce4-netload-plugin because the rate shows 0.00 Mbps when I get above some threshold (not sure what it is exactly but it's in the 15-40 Gbps range)

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]]>https://board.circlewithadot.net/topic/86f58403-9425-40ba-9be8-85f0a4aa518b/weird-things-that-happen-when-you-have-a-100gbe-pipe-to-your-desk.RSS for NodeFri, 15 May 2026 08:26:24 GMTFri, 01 May 2026 03:44:30 GMT60<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 14:03:16 GMT]]>@BenHM3 the future would be if that was internet bandwidth not LAN

]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116499690047883112https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116499690047883112Fri, 01 May 2026 14:03:16 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 13:55:53 GMT]]>@azonenberg

[That stable rate]: Proof we're living in the future.

]]>https://board.circlewithadot.net/post/https://saint-paul.us/ap/users/115736849857800684/statuses/116499661039295341https://board.circlewithadot.net/post/https://saint-paul.us/ap/users/115736849857800684/statuses/116499661039295341Fri, 01 May 2026 13:55:53 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 04:35:44 GMT]]>yep that's exactly what it was... backported the upstream fix (from only 8 months ago) to the debian packaged version and it's happy now even when saturating 100G

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]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497458397857717https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497458397857717Fri, 01 May 2026 04:35:44 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 04:27:17 GMT]]>@pikhq And it's fixed upstream 8 months ago https://gitlab.xfce.org/panel-plugins/xfce4-netload-plugin/-/commit/89a1e888f6664826e3a2f2bcdf366fd39fcfa001

Guess i'll see if i can backport that diff to the debian packaged version that's probably the easiest

]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497425200055520https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497425200055520Fri, 01 May 2026 04:27:17 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 04:23:27 GMT]]>@pikhq ok yeah I'm certain now. played around with bandwidth limited iperf3 and the bug kicks in almost exactly at 17.1 Gbps which is 2^31 bytes per second

]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497410149392528https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497410149392528Fri, 01 May 2026 04:23:27 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 04:07:34 GMT]]>@pikhq i suspect running an ultra-lightweight DE on a machine with 128 CPU cores, half a TB of RAM, and a 100G NIC is not a common use case 😛

]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497347644637161https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497347644637161Fri, 01 May 2026 04:07:34 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 04:07:02 GMT]]>@pikhq i'm pretty sure what is happening (not having dug into the code yet) is that it looks at ifconfig stats each update interval, default 4 Hz, and subtracts to calculate bits per second.

and probably uses an int32 temporary somewhere in the process

]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497345569070732https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497345569070732Fri, 01 May 2026 04:07:02 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 04:04:26 GMT]]>@azonenberg that sounds like it'd make for a fun bug report for the xfce folks 😛

]]>https://board.circlewithadot.net/post/https://social.treehouse.systems/users/pikhq/statuses/116497335332131969https://board.circlewithadot.net/post/https://social.treehouse.systems/users/pikhq/statuses/116497335332131969Fri, 01 May 2026 04:04:26 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 04:01:14 GMT]]>@DeweyOxberger They're in good company I have two 100G and five 40G links lit up in my LAN at the moment (and six 10G... no 25G at the moment and more 1G than I feel like counting right now)

]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497322792683416https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116497322792683416Fri, 01 May 2026 04:01:14 GMT<![CDATA[Reply to Weird things that happen when you have a 100GbE pipe to your desk. on Fri, 01 May 2026 03:58:27 GMT]]>@azonenberg 100Gb? That's like the entire world's supply of trained electrons. Better get more of em trained up!

]]>https://board.circlewithadot.net/post/https://techhub.social/users/DeweyOxberger/statuses/116497311793361797https://board.circlewithadot.net/post/https://techhub.social/users/DeweyOxberger/statuses/116497311793361797Fri, 01 May 2026 03:58:27 GMT