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Differential D26567

Reorder struct sysentvec
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Authored by trasz on Sep 27 2020, 6:56 PM.
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imp

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kib
Summary

Reorder struct sysentvec so that commonly accessed fields are close
together.

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Repository
rS FreeBSD src repository - subversion
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Lint Passed
Unit
No Test Coverage
Build Status
Buildable 33843
Build 31060: arc lint + arc unit

Event Timeline

trasz created this revision.Sep 27 2020, 6:56 PM
Herald added a subscriber: imp. · View Herald TranscriptSep 27 2020, 6:56 PM
trasz requested review of this revision.Sep 27 2020, 6:56 PM
Harbormaster completed remote builds in B33843: Diff 77575.Sep 27 2020, 6:56 PM
kib added a comment.Sep 29 2020, 1:12 PM

What is the point ? Is this based on any measurements ? I see it as an arbitrary tweaking that does not serve any obvious purpose.

trasz added a comment.Sep 30 2020, 11:00 AM

The point is to avoid unnecessary cache misses. No measurements yet; syscall overhead is still to big to make stuff like that noticeable. I'm not in a hurry with this patch though, so let's wait until I can show that it makes a difference (or show that it doesn't).

trasz abandoned this revision.Mar 22 2024, 9:28 AM

Revision Contents
Changeset List

PathSize
sys/
sys/
12 lines

Diff 77575

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sys/sys/sysent.h

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