kernel.git/tools/tracing/rtla/src/osnoise.h, branch master

rtla: Set stop threshold after all instances are enabled

2026-01-07T14:57:15Z

This avoids startup races where one of the instances hit a threshold before all instances were enabled, and thus tracing stops without the relevant event. In particular, this is not uncommon with the tests that set a very tight threshold and then complain if there's no analysis. This also ensures that we don't stop tracing during a warmup. The downside is a small chance of having an event over the threshold early in the output, without stopping on it, which could cause user confusion. This should be less likely if the warmup feature is used, but that doesn't eliminate the race window, just the odds of an unusual spike right at that moment. Signed-off-by: Crystal Wood Link: https://lore.kernel.org/r/20251112152529.956778-6-crwood@redhat.com Signed-off-by: Tomas Glozar

tools/rtla: Remove unused function declarations

2026-01-06T09:11:59Z

Historically four function declarations remain orphaned or duplicated. Remove them to keep the source clean. Signed-off-by: Costa Shulyupin Link: https://lore.kernel.org/r/20251012071133.290225-1-costa.shul@redhat.com Signed-off-by: Tomas Glozar

tools/rtla: Consolidate code between osnoise/timerlat and hist/top

2025-09-27T08:52:57Z

Currently a lot of code is duplicated between the different rtla tools, making maintenance more difficult, and encouraging divergence such as features that are only implemented for certain tools even though they could be more broadly applicable. Merge the various main() functions into a common run_tool() with an ops struct for tool-specific details. Implement enough support for actions on osnoise to not need to keep the old params->trace_output path. Cc: John Kacur Cc: Costa Shulyupin Link: https://lore.kernel.org/20250907022325.243930-5-crwood@redhat.com Reviewed-by: Tomas Glozar Signed-off-by: Crystal Wood Signed-off-by: Steven Rostedt (Google)

tools/rtla: Create common_apply_config()

2025-09-27T08:52:46Z

Merge the common bits of osnoise_apply_config() and timerlat_apply_config(). Put the result in a new common.c, and move enough things to common.h so that common.c does not need to include osnoise.h. Cc: John Kacur Cc: Costa Shulyupin Link: https://lore.kernel.org/20250907022325.243930-4-crwood@redhat.com Reviewed-by: Tomas Glozar Signed-off-by: Crystal Wood Signed-off-by: Steven Rostedt (Google)

tools/rtla: Move top/hist params into common struct

2025-09-27T08:52:17Z

The hist members were very similar between timerlat and top, so just use one common hist struct. output_divisor, quiet, and pretty printing are pretty generic concepts that can go in the main struct even if not every specific tool (currently) uses them. Cc: John Kacur Cc: Costa Shulyupin Link: https://lore.kernel.org/20250907022325.243930-3-crwood@redhat.com Reviewed-by: Tomas Glozar Signed-off-by: Crystal Wood Signed-off-by: Steven Rostedt (Google)

tools/rtla: Consolidate common parameters into shared structure

2025-09-27T08:51:18Z

timerlat_params and osnoise_params structures contain 15 identical fields. Introduce a new header common.h and define a common_params structure to consolidate shared fields, reduce code duplication, and enhance maintainability. Cc: John Kacur Link: https://lore.kernel.org/20250907022325.243930-2-crwood@redhat.com Reviewed-by: Tomas Glozar Signed-off-by: Costa Shulyupin Signed-off-by: Crystal Wood Signed-off-by: Steven Rostedt (Google)

rtla: Unify apply_config between top and hist

2025-03-26T14:36:39Z

The functions osnoise_top_apply_config and osnoise_hist_apply_config, as well as timerlat_top_apply_config and timerlat_hist_apply_config, are mostly the same. Move common part from them into separate functions osnoise_apply_config and timerlat_apply_config. For rtla-timerlat, also unify params->user_hist and params->user_top into one field called params->user_data, and move several fields used only by timerlat-top into the top-only section of struct timerlat_params. Cc: Luis Goncalves Link: https://lore.kernel.org/20250320092500.101385-3-tglozar@redhat.com Signed-off-by: Tomas Glozar Reviewed-by: John Kacur Signed-off-by: Steven Rostedt (Google)

rtla/osnoise: Unify params struct

2025-03-26T14:36:39Z

Instead of having separate structs osnoise_top_params and osnoise_hist_params, use one struct osnoise_params for both. This allows code using the structs to be shared between osnoise-top and osnoise-hist. Cc: Luis Goncalves Link: https://lore.kernel.org/20250320092500.101385-2-tglozar@redhat.com Signed-off-by: Tomas Glozar Reviewed-by: John Kacur Signed-off-by: Steven Rostedt (Google)

rtla/timerlat: Unify params struct

2025-03-04T17:35:17Z

Instead of having separate structs timerlat_top_params and timerlat_hist_params, use one struct timerlat_params for both. This allows code using the structs to be shared between timerlat-top and timerlat-hist. Cc: John Kacur Cc: Luis Goncalves Cc: Gabriele Monaco Cc: Clark Williams Link: https://lore.kernel.org/20250218145859.27762-2-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google)

rtla: Add function to report missed events

2025-01-24T18:46:43Z

Add osnoise_report_missed_events to be used to report the number of missed events either during or after an osnoise or timerlat run. Also, display the percentage of missed events compared to the total number of received events. If an unknown number of missed events was reported during the run, the entire number of missed events is reported as unknown. Cc: John Kacur Cc: Luis Goncalves Cc: Gabriele Monaco Link: https://lore.kernel.org/20250123142339.990300-4-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google)