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Differential D12442

Some small packet performance improvements
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Authored by shurd on Sep 21 2017, 9:56 PM.
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Reviewers
sbruno
Group Reviewers
Intel Networking
Commits
rS323941: Some small packet performance improvements
Summary
  1. If the packet is smaller than MTU, disable the TSO flags.
  2. Move TCP header parsing inside the IS_TSO?() test.
  3. Add a new IFLIB_NEED_ZERO_CSUM flag to indicate the checksums need to be zeroed before TX.
Test Plan

Test small packet throughput before/after this patch

Diff Detail

Repository
rS FreeBSD src repository - subversion
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Event Timeline

shurd created this revision.Sep 21 2017, 9:56 PM
Herald added a reviewer: Intel Networking. · View Herald TranscriptSep 21 2017, 9:56 PM
Herald added subscribers: ae, imp. · View Herald Transcript
Harbormaster completed remote builds in B11662: Diff 33284.Sep 21 2017, 9:56 PM
shurd retitled this revision from Some cache related optimizations to Some small packet performance improvements.Sep 21 2017, 9:57 PM
shurd edited the summary of this revision. (Show Details)
shurd edited the test plan for this revision. (Show Details)
sbruno accepted this revision.Sep 22 2017, 12:51 PM
This revision is now accepted and ready to land.Sep 22 2017, 12:51 PM
Closed by commit rS323941: Some small packet performance improvements (authored by shurd). · Explain WhySep 23 2017, 1:33 AM
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

PathSize
head/
sys/
dev/
e1000/
4 lines
net/
4 lines
44 lines

Diff 33347

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head/sys/dev/e1000/if_em.c

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head/sys/net/iflib.h

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head/sys/net/iflib.c

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