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Regression #12873
closed
Hyper-V RSC support in ``hn(4)`` driver is enabled by default and results in very low throughput
Start date:
Due date:
% Done:
0%
Estimated time:
Plus Target Version:
22.05
Release Notes:
Default
Affected Version:
2.6.0
Affected Architecture:
amd64
Description
RSC support was added to FreeBSD in 12.3 and is included in pfSense 22.01/2.6.
When run in Hyper-V it can create very low throughput in some conditions. That can be mitigated in some setups by disabling RSC in the vSwitches but not all.
RSC should be disabled when the system is routing but is not automatically and the current driver implementation provides no way to disable it manually.
Updated by Steve Wheeler over 2 years ago
This looks to have been addressed by this: https://reviews.freebsd.org/D34507
Only in FreeBSD/main currently.
Updated by Steve Wheeler over 2 years ago
- Status changed from New to Feedback
This patch is now in 2.7 and 22.05-beta snapshots.
Updated by Steve Wheeler over 2 years ago
This seems to work as expected.
[22.05-BETA][admin@azure10.stevew.lan]/root: sysctl dev.hn.0.rsc_switch dev.hn.0.rsc_switch: 0 [22.05-BETA][admin@azure10.stevew.lan]/root: sysctl -d dev.hn.0.rsc_switch dev.hn.0.rsc_switch: switch to rsc
RSC support is now disabled by default.
Updated by Jim Pingle over 2 years ago
- Subject changed from Hyper-V: RSC support in hn(4) creates very low thoughput to Hyper-V RSC support in ``hn(4)`` driver is enabled by default and results in very low throughput
Updating subject for release notes.
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