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/hist. Changes from V2: - Add timerlat hist -u option - Link: https://lore.kernel.org/lkml/cover.1684863094.git.bristot@xxxxxxxxxx/ 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 (11): 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 rtla: Add timerlat user-space support for Documentation: Add tools/rtla timerlat -u option documentation Documentation/tools/rtla/common_options.rst | 8 + .../tools/rtla/common_timerlat_aa.rst | 7 - .../tools/rtla/common_timerlat_options.rst | 7 + .../tools/rtla/rtla-timerlat-hist.rst | 7 +- .../tools/rtla/rtla-timerlat-top.rst | 7 + 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 | 262 ++++++++++++-- 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 + 17 files changed, 1277 insertions(+), 106 deletions(-) create mode 100644 tools/tracing/rtla/src/timerlat_u.c create mode 100644 tools/tracing/rtla/src/timerlat_u.h -- 2.38.1
