hwpmc/amd: add LBR v2 sampling on the PerfMonV2 path
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Authored by afscoelho_gmail.com on Sat, Oct 10, 1:22 AM.

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Reviewers

mhorne
gnn
ali_mashtizadeh.com

Group Reviewers

pmc

Summary

Read the branch records in the PMC interrupt and log them with the
sample. Clear the records on context switch and exec. Advertise
PMC_CAP_LBR.

Depends on D60569

Test Plan

Built amd64 GENERIC + hwpmc.ko, GENERIC without HWPMC_HOOKS, and arm64.
Ran tests/sys/pmc on AMD Zen 6 (LBR v2).

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Repository

rG FreeBSD src repository

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Unit

Tests Skipped

Build Status

Buildable 77943
Build 74826: arc lint + arc unit

Event Timeline

afscoelho_gmail.com created this revision.Sat, Oct 10, 1:22 AM

Herald added a subscriber: imp. · View Herald TranscriptSat, Oct 10, 1:22 AM

Harbormaster completed remote builds in B77943: Diff 189325.Sat, Oct 10, 1:22 AM

afscoelho_gmail.com requested review of this revision.Sat, Oct 10, 1:22 AM

afscoelho_gmail.com added a child revision: D60571: libpmc, pmcstat: add the lbr qualifier and decode LBR records.

Revision Contents
Changeset List

Path

Size

sys/

dev/

hwpmc/

hwpmc_amd.c

217 lines

hwpmc_amd_lbr.h

47 lines

tests/

sys/

pmc/

pmc_lbr_test.c

109 lines

Diff 189325

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sys/dev/hwpmc/hwpmc_amd.c

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sys/dev/hwpmc/hwpmc_amd_lbr.h

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tests/sys/pmc/pmc_lbr_test.c

hwpmc/amd: add LBR v2 sampling on the PerfMonV2 pathNeeds ReviewPublicActions

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Revision ContentsChangeset List

Diff 189325

sys/dev/hwpmc/hwpmc_amd.c

sys/dev/hwpmc/hwpmc_amd_lbr.h

tests/sys/pmc/pmc_lbr_test.c

hwpmc/amd: add LBR v2 sampling on the PerfMonV2 path
Needs ReviewPublic
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Revision Contents
Changeset List