[PATCH V3 00/10] perf intel-pt: Add perf event clocks to better support VM tracing

Adrian Hunter
2022-03-07T08:53:23Z

Hi

Here is V3.

These patches add 2 new perf event clocks based on TSC for use with VMs.

The first patch is a minor fix, the next 2 patches add each of the 2 new
clocks. The remaining patches add minimal tools support and are based on
top of the Intel PT Event Trace tools' patches.

The future work, to add the ability to use perf inject to inject perf
events from a VM guest perf.data file into a VM host perf.data file,
has yet to be implemented.

Changes in V3:

perf/x86: Add support for TSC as a perf event clock
perf/x86: Add support for TSC in nanoseconds as a perf event clock
Drop magic flag for non-standard clock ids
Move new clockids into clock.h
Adjust comments to warn about new clocks

perf tools: Add new perf clock IDs
perf tools: Add API probes for new clock IDs
perf tools: Add new clock IDs to "perf time to TSC" test
perf tools: Add perf_read_tsc_conv_for_clockid()
perf intel-pt: Add support for new clock IDs
perf intel-pt: Add config variables for timing parameters
perf intel-pt: Add documentation for new clock IDs
Drop magic flag for non-standard clock ids
Adjust documentation to warn about new clocks

perf intel-pt: Use CLOCK_PERF_HW_CLOCK_NS by default
Dropped patch

Changes in V2:
perf/x86: Fix native_perf_sched_clock_from_tsc() with __sched_clock_offset
Add __sched_clock_offset unconditionally

perf/x86: Add support for TSC as a perf event clock
Use an attribute bit 'ns_clockid' to identify non-standard clockids

perf/x86: Add support for TSC in nanoseconds as a perf event clock
Do not affect use of __sched_clock_offset
Adjust to use 'ns_clockid'

perf tools: Add new perf clock IDs
perf tools: Add API probes for new clock IDs
perf tools: Add new clock IDs to "perf time to TSC" test
perf tools: Add perf_read_tsc_conv_for_clockid()
perf intel-pt: Add support for new clock IDs
perf intel-pt: Use CLOCK_PERF_HW_CLOCK_NS by default
perf intel-pt: Add config variables for timing parameters
perf intel-pt: Add documentation for new clock IDs
Adjust to use 'ns_clockid'

Adrian Hunter (10):
perf/x86: Fix native_perf_sched_clock_from_tsc() with __sched_clock_offset
perf/x86: Add support for TSC as a perf event clock
perf/x86: Add support for TSC in nanoseconds as a perf event clock
perf tools: Add new perf clock IDs
perf tools: Add API probes for new clock IDs
perf tools: Add new clock IDs to "perf time to TSC" test
perf tools: Add perf_read_tsc_conv_for_clockid()
perf intel-pt: Add support for new clock IDs
perf intel-pt: Add config variables for timing parameters
perf intel-pt: Add documentation for new clock IDs

arch/x86/events/core.c | 39 +++++++++++--
arch/x86/include/asm/perf_event.h | 5 ++
arch/x86/kernel/tsc.c | 2 +-
include/uapi/linux/time.h | 17 ++++++
kernel/events/core.c | 13 +++++
tools/perf/Documentation/perf-config.txt | 18 ++++++
tools/perf/Documentation/perf-intel-pt.txt | 45 +++++++++++++++
tools/perf/Documentation/perf-record.txt | 11 +++-
tools/perf/arch/x86/util/intel-pt.c | 89 ++++++++++++++++++++++++++++--
tools/perf/builtin-record.c | 2 +-
tools/perf/tests/perf-time-to-tsc.c | 42 +++++++++++---
tools/perf/util/clockid.c | 5 ++
tools/perf/util/clockid.h | 8 +++
tools/perf/util/intel-pt.c | 30 ++++++++--
tools/perf/util/intel-pt.h | 7 ++-
tools/perf/util/perf_api_probe.c | 23 ++++++++
tools/perf/util/perf_api_probe.h | 2 +
tools/perf/util/tsc.c | 56 +++++++++++++++++++
tools/perf/util/tsc.h | 1 +
19 files changed, 387 insertions(+), 28 deletions(-)

Regards
Adrian