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Subject[PATCH V2 0/2] perf/x86: Add ability to sample TSC
Date
Hi

TSC is needed to synchronize Intel Processor Trace (Intel PT)
with perf event samples. Refer to patch 1 for more details.

There is a description of Intel PT in the Intel Architecture
manuals:

http://www.intel.com/content/www/us/en/processors/architectures-software-developer-manuals.html

With the advent of switching perf_clock to CLOCK_MONOTONIC,
it will not be possible to convert perf_clock directly to/from
TSC. So add the ability to sample TSC instead.

Changes in V2:
perf: Sample additional clock value
Rename "Architecture specific clock" to
"Processor trace clock"
Rename PERF_SAMPLE_CLOCK_ARCH -> PERF_SAMPLE_CLOCK_PT etc
Expand commit message

perf/x86: Provide TSC for PERF_SAMPLE_CLOCK_PT
Rename PERF_SAMPLE_CLOCK_ARCH -> PERF_SAMPLE_CLOCK_PT etc
Expand commit message


Adrian Hunter (2):
perf: Sample additional clock value
perf/x86: Provide TSC for PERF_SAMPLE_CLOCK_PT

arch/x86/include/asm/perf_event.h | 6 ++++++
arch/x86/kernel/cpu/perf_event.c | 10 ++++++++++
include/linux/perf_event.h | 3 ++-
include/uapi/linux/perf_event.h | 19 +++++++++++++++++--
kernel/events/core.c | 30 ++++++++++++++++++++++++++++++
kernel/events/internal.h | 4 ++++
6 files changed, 69 insertions(+), 3 deletions(-)


Regards
Adrian


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