This series present a new tool inside rtla. It is named hwnoise.
hwnoise dispatches the osnoise tracer and displays a summary of the noise.
The difference is that it runs the tracer with the OSNOISE_IRQ_DISABLE
option set, thus only allowing only hardware-related noise, resulting in
a simplified output. hwnoise has the same features of osnoise.
An example of the tool's output:
# rtla hwnoise -c 1-5 -T 1 -d 10m -q
Hardware-related Noise
duration: 0 00:10:00 | time is in us
CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI
1 #599 599000000 138 99.99997 3 3 4 74
2 #599 599000000 85 99.99998 3 3 4 75
3 #599 599000000 86 99.99998 4 3 6 75
4 #599 599000000 81 99.99998 4 4 2 75
5 #599 599000000 85 99.99998 2 2 2 75
Changes from v2:
Consolidate patches 1/5 into a single one (Steven)
Change the osnoise option macro to code (Steven)
Changes from v1:
Add rtla-hwnoise to the rtla documentation index
(kernel test robot/Bagas Sanjaya)
Daniel Bristot de Oliveira (2):
rtla: Add hwnoise tool
Documentation/rtla: Add hwnoise man page
Documentation/tools/rtla/index.rst | 1 +
Documentation/tools/rtla/rtla-hwnoise.rst | 107 ++++++++++++++++++++
tools/tracing/rtla/Makefile | 2 +
tools/tracing/rtla/src/osnoise.c | 117 ++++++++++++++++++++++
tools/tracing/rtla/src/osnoise.h | 7 ++
tools/tracing/rtla/src/osnoise_top.c | 84 +++++++++++++---
tools/tracing/rtla/src/rtla.c | 4 +
7 files changed, 306 insertions(+), 16 deletions(-)
create mode 100644 Documentation/tools/rtla/rtla-hwnoise.rst
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2.38.1
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