src/lib/libpmc, branch main

pmc: Fix copyright in previous commits

2026-03-25T21:24:18Z

Fix the copyright attribution to Netflix and the date and missing SPDX line in pmc.ibs man page. Sponsored by: Netflix Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/2094

libpmc/pmu-events: Add support for new json fields

2026-03-24T10:34:12Z

This change adds support for three new Intel fields to jevents.c: - MetricThreshold - MetricgroupNoGroup - DefaultMetricgroupName Reviewed by: ali_mashtizadeh.com, mhorne Differential Revision: https://reviews.freebsd.org/D56017 MFC after: 1 week

pmc: Import Intel Meteor Lake events

2026-03-24T10:33:01Z

Obtained from: Intel perfmon (JSON event definitions) Tested by: bms, olivier MFC after: 1 week Reviewed by: ali_mashtizadeh.com, mhorne Differential Revision: https://reviews.freebsd.org/D55641

libpmc: Add support for IBS qualifiers

2026-03-23T20:21:28Z

Add support to libpmc for parsing the IBS qualifiers and computing the ctl register value as a function of the qualifiers and the sample rate. This includes all of the flags available up to AMD Zen 5. Along side these user facing changes I included the documentation for AMD IBS. Reviewed by: mhorne Sponsored by: Netflix Pull Request: https://github.com/freebsd/freebsd-src/pull/2081

libpmc: Query hwpmc for caps

2026-03-16T23:31:15Z

This change allows for fine-grained capabilities per counter index. This is particularly useful for AMD where subclasses are not exposed to the general PMC code, but other architectures also have asymmetric behaviors when it comes to specific counter indices. A new PMC_OP_GETCAPS op is added to the hwpmc(4) ioctl interface. Reviewed by: mhorne Sponsored by: Netflix Pull Request: https://github.com/freebsd/freebsd-src/pull/2058

jevents: include file path in whitelist error message

2026-03-16T23:25:46Z

A small enhancement. Reviewed by: Ali Mashtizadeh Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D55830

libpmc: Explicitly whitelist json fields

2026-03-10T22:20:17Z

Adds all missing Intel fields and turns jevents.c into an explicit white list mechanism so that we no longer ignore important fields that often invalidate the counter. The json event parser must now parse every field on each architecture that we support. This has been tested by running tinderbox and manually running jevent against our current json repository. As a bonus I fixed spelling errors in the AMD JSON definitions. Sponsored by: Netflix Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/2055

libpmc: Import AMD Zen 6 PMU events.

2026-02-27T21:27:35Z

Sponsored by: Netflix Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/2049

libpmc: Update event definitions for AMD Zen

2026-02-27T21:26:34Z

The pmu event definitions for AMD Zen 5 was updated since it was imported into the tree. As a bonus I also updated the recommended json counters for Zen 1-3 even though we do not use that file yet. Sponsored by: Netflix Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/2048

hwpmc: Initial support for AMD IBS

2026-02-27T21:22:16Z

This patch adds support for AMD IBS. It adds a new class of performance counter that cotains two events: ibs-fetch and ibs-op events. Unlike most existing sampled events, IBS events provide a number of values containing extra information regarding the sample. To support this we use the existing callchain event, and introduce a new flag for multipart payloads. The first 8 bytes of the pc_sample contains a header that defines up to four payloads. Sponsored by: Netflix Reviewed by: imp,mhorne Pull Request: https://github.com/freebsd/freebsd-src/pull/2022