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tracing(7): Add hwt(4)
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Authored by 0mp on Jul 12 2025, 9:43 AM.
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bnovkov
br
zachary.leaf_arm.com
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rG10d336114d48: tracing(7): Add hwt(4)
Summary

Also, add reference tracing(7) from hwt(4).

Event: Berlin 2025 Hackathon

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rG FreeBSD src repository
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Buildable 65374
Build 62257: arc lint + arc unit

Event Timeline

0mp created this revision.Jul 12 2025, 9:43 AM
Herald added subscribers: ziaee, imp. · View Herald TranscriptJul 12 2025, 9:43 AM
0mp requested review of this revision.Jul 12 2025, 9:43 AM
Harbormaster completed remote builds in B65374: Diff 158361.Jul 12 2025, 9:43 AM
0mp added reviewers: bnovkov, br, zachary.leaf_arm.com.Jul 12 2025, 9:43 AM
bnovkov added inline comments.Jul 12 2025, 12:11 PM
share/man/man7/tracing.7
76

I think that we should either place this into a new "Hardware-accelerated tracing" subsection or rename the "Hardware Counters" subsection in a way that covers both techonolgies. Hardware tracing units and performance counters work in different ways and have different use cases (i.e., profiling vs tracing), so we should definitely make a distinction here.

78
0mp updated this revision to Diff 158368.Jul 12 2025, 2:09 PM
0mp marked 2 inline comments as done.
  • Address feedback
Harbormaster completed remote builds in B65376: Diff 158368.Jul 12 2025, 2:09 PM
0mp added a comment.Jul 12 2025, 2:10 PM

Thanks, Bojan!

share/man/man7/tracing.7
76

I'll add a new section. Thanks!

78

That's a copy from hwt(4), so we might want to update that manual as well if desired.

ziaee added inline comments.Jul 12 2025, 2:31 PM
share/man/man7/tracing.7
11

Okay. So if you're running current, look at apropos freebsd. I've spent a ton of effort over the last two years to try and scope it to broad concept overview manuals. This one should get on there.

0mp marked an inline comment as done.Jul 12 2025, 4:02 PM
0mp added inline comments.
share/man/man7/tracing.7
11

Committed: 47ffc24fbb6476676c0d40b28e43c83dbc8fac9d

0mp marked an inline comment as done.Jul 12 2025, 4:03 PM
bnovkov accepted this revision.Jul 13 2025, 3:08 PM
This revision is now accepted and ready to land.Jul 13 2025, 3:08 PM
Closed by commit rG10d336114d48: tracing(7): Add hwt(4) (authored by 0mp). · Explain WhyJul 13 2025, 3:36 PM
This revision was automatically updated to reflect the committed changes.
0mp added a commit: rG10d336114d48: tracing(7): Add hwt(4).

Revision Contents
Changeset List

PathSize
share/
man/
man4/
3 lines
man7/
5 lines

Diff 158361

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share/man/man4/hwt.4

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share/man/man7/tracing.7

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