[PATCH v3 0/4] add support for self monitoring

[Tomasz Duszynski]

This series adds self monitoring support i.e allows to configure and
read performance measurement unit (PMU) counters in runtime without
using perf utility. This has certain adventages when application runs on
isolated cores with nohz_full kernel parameter.

Events can be read directly using rte_pmu_read() or using dedicated
tracepoint rte_eal_trace_pmu_read(). The latter will cause events to be
stored inside CTF file.

By design, all enabled events are grouped together and the same group
is attached to lcores that use self monitoring funtionality.

Events are enabled by names, which need to be read from standard
location under sysfs i.e

/sys/bus/event_source/devices/PMU/events

where PMU is a core pmu i.e one measuring cpu events. As of today
raw events are not supported.

v3:
- fix shared build
v2:
- fix problems reported by test build infra

Tomasz Duszynski (4):
  eal: add generic support for reading PMU events
  eal/arm: support reading ARM PMU events in runtime
  eal/x86: support reading Intel PMU events in runtime
  eal: add PMU support to tracing library

 app/test/meson.build                     |   1 +
 app/test/test_pmu.c                      |  47 ++
 app/test/test_trace_perf.c               |   4 +
 doc/guides/prog_guide/profile_app.rst    |  13 +
 doc/guides/prog_guide/trace_lib.rst      |  32 ++
 lib/eal/arm/include/meson.build          |   1 +
 lib/eal/arm/include/rte_pmu_pmc.h        |  39 ++
 lib/eal/arm/meson.build                  |   4 +
 lib/eal/arm/rte_pmu.c                    | 104 +++++
 lib/eal/common/eal_common_trace_points.c |   3 +
 lib/eal/common/meson.build               |   3 +
 lib/eal/common/pmu_private.h             |  41 ++
 lib/eal/common/rte_pmu.c                 | 520 +++++++++++++++++++++++
 lib/eal/include/meson.build              |   1 +
 lib/eal/include/rte_eal_trace.h          |  11 +
 lib/eal/include/rte_pmu.h                | 207 +++++++++
 lib/eal/linux/eal.c                      |   4 +
 lib/eal/version.map                      |   7 +
 lib/eal/x86/include/meson.build          |   1 +
 lib/eal/x86/include/rte_pmu_pmc.h        |  33 ++
 20 files changed, 1076 insertions(+)
 create mode 100644 app/test/test_pmu.c
 create mode 100644 lib/eal/arm/include/rte_pmu_pmc.h
 create mode 100644 lib/eal/arm/rte_pmu.c
 create mode 100644 lib/eal/common/pmu_private.h
 create mode 100644 lib/eal/common/rte_pmu.c
 create mode 100644 lib/eal/include/rte_pmu.h
 create mode 100644 lib/eal/x86/include/rte_pmu_pmc.h

--
2.25.1