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Differential D35486

make iommu_gas_lowermatch non-recursive
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Authored by dougm on Jun 14 2022, 6:31 PM.
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alc
kib
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rG3a33ebe65fce: iommu_gas: make iommu_gas_lowermatch non-recursive
rGf979ad003065: iommu_gas: make iommu_gas_lowermatch non-recursive
Summary

make iommu_gas_lowermatch non-recursive, and still first-fitting.

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rG FreeBSD src repository
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Event Timeline

dougm requested review of this revision.Jun 14 2022, 6:31 PM
dougm created this revision.
alc added inline comments.Jun 14 2022, 10:39 PM
sys/dev/iommu/iommu_gas.c
411

Deindent this line by 4 spaces.

dougm updated this revision to Diff 106938.Jun 15 2022, 1:51 AM
dougm marked an inline comment as done.

Fix indent.

alc added a comment.Jun 15 2022, 5:33 AM

I'd estimate that this change increases the achieved bandwidth by netperf TCP_MAERTS from about 3500-3550Mbps to 3650-3700MBps.

dougm updated this revision to Diff 106941.Jun 15 2022, 5:59 AM

Enhance comments.

dougm updated this revision to Diff 106942.Jun 15 2022, 6:18 AM

Add braces.

alc accepted this revision.Jun 15 2022, 6:20 AM
This revision is now accepted and ready to land.Jun 15 2022, 6:20 AM
dougm added a reviewer: kib.Jun 15 2022, 6:22 AM
kib accepted this revision.Jun 15 2022, 2:36 PM
Closed by commit rGf979ad003065: iommu_gas: make iommu_gas_lowermatch non-recursive (authored by dougm). · Explain WhyJun 15 2022, 4:37 PM
This revision was automatically updated to reflect the committed changes.
dougm added a commit: rGf979ad003065: iommu_gas: make iommu_gas_lowermatch non-recursive.
Herald added a subscriber: imp. · View Herald TranscriptJun 15 2022, 4:37 PM
dougm added a commit: rG3a33ebe65fce: iommu_gas: make iommu_gas_lowermatch non-recursive.Jul 6 2022, 5:05 PM

Revision Contents
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PathSize
sys/
dev/
iommu/
76 lines

Diff 106954

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sys/dev/iommu/iommu_gas.c

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