This is a series of improvements for rtla, mainly as a result of our
daily usage of the tool debugging problems at red hat.
The cgroup support and house keeping options are from our usage
of the tool debugging containers.
The auto-analysis overhead reduction is needed when we go to
large boxes - but it is really hand in practice, as it gives an idea
of the problem without having to look at the trace.
Running hwnoise 100 % of CPU time might cause some systems
to slow down too much. Reduce its utilization to 75% by default to
avoid problems for people using it for the first time.
Finally, it adds support for running timerlat user-space threads,
and to collect the additional field via rtla timerlat top.
Changes from V1:
- Add the user-space thread support to rtla timerlat top
Link: https://lore.kernel.org/lkml/cover.1683827510.git.bristot@xxxxxxxxxx/
Daniel Bristot de Oliveira (9):
rtla: Add -C cgroup support
rtla: Add --house-keeping option
rtla: Change monitored_cpus from char * to cpu_set_t
rtla: Automatically move rtla to a house-keeping cpu
rtla/timerlat: Give timerlat auto analysis its own instance
rtla/timerlat_hist: Add auto-analysis support
rtla: Start the tracers after creating all instances
rtla/hwnoise: Reduce runtime to 75%
rtla: Add timerlat user-space support for timerlat top
Documentation/tools/rtla/common_options.rst | 8 +
.../tools/rtla/common_timerlat_aa.rst | 7 -
.../tools/rtla/rtla-timerlat-hist.rst | 7 +-
.../tools/rtla/rtla-timerlat-top.rst | 14 +
tools/tracing/rtla/src/osnoise.c | 65 ++++
tools/tracing/rtla/src/osnoise.h | 5 +
tools/tracing/rtla/src/osnoise_hist.c | 90 ++++-
tools/tracing/rtla/src/osnoise_top.c | 83 ++++-
tools/tracing/rtla/src/timerlat_aa.c | 35 +-
tools/tracing/rtla/src/timerlat_aa.h | 5 +-
tools/tracing/rtla/src/timerlat_hist.c | 139 +++++++-
tools/tracing/rtla/src/timerlat_top.c | 229 +++++++++++--
tools/tracing/rtla/src/timerlat_u.c | 224 ++++++++++++
tools/tracing/rtla/src/timerlat_u.h | 18 +
tools/tracing/rtla/src/utils.c | 324 +++++++++++++++++-
tools/tracing/rtla/src/utils.h | 7 +
16 files changed, 1162 insertions(+), 98 deletions(-)
create mode 100644 tools/tracing/rtla/src/timerlat_u.c
create mode 100644 tools/tracing/rtla/src/timerlat_u.h
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2.38.1
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