[for-next][PATCH 0/9] rtla: Updates for 6.15

[for-next][PATCH 0/9] rtla: Updates for 6.15

[Steven Rostedt]

  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
tools/for-next

Head SHA1: 732032692f6ae311bc35159b18e5b7c5e64010fc


John Kacur (1):
      rtla: Add the ability to create ctags and etags

Tomas Glozar (8):
      tools/build: Use SYSTEM_BPFTOOL for system bpftool
      rtla: Fix segfault in save_trace_to_file call
      rtla/osnoise: Unify params struct
      rtla: Unify apply_config between top and hist
      rtla/osnoise: Set OSNOISE_WORKLOAD to true
      rtla: Always set all tracer options
      rtla/tests: Reset osnoise options before check
      rtla/tests: Test setting default options

----
 tools/build/feature/Makefile           |   2 +-
 tools/scripts/Makefile.include         |   2 +-
 tools/tracing/rtla/Makefile            |   2 +-
 tools/tracing/rtla/Makefile.rtla       |  17 ++++-
 tools/tracing/rtla/src/osnoise.c       |  86 ++++++++++++++++++++++-
 tools/tracing/rtla/src/osnoise.h       |  48 +++++++++++++
 tools/tracing/rtla/src/osnoise_hist.c  | 121 +++++---------------------------
 tools/tracing/rtla/src/osnoise_top.c   | 123 ++++-----------------------------
 tools/tracing/rtla/src/timerlat.c      | 106 ++++++++++++++++++++++++++++
 tools/tracing/rtla/src/timerlat.h      |  12 ++--
 tools/tracing/rtla/src/timerlat_hist.c | 122 +++++---------------------------
 tools/tracing/rtla/src/timerlat_top.c  | 113 ++++--------------------------
 tools/tracing/rtla/src/trace.c         |   2 +-
 tools/tracing/rtla/tests/engine.sh     |  66 ++++++++++++++++++
 tools/tracing/rtla/tests/osnoise.t     |   6 ++
 15 files changed, 397 insertions(+), 431 deletions(-)

[for-next][PATCH 1/9] tools/build: Use SYSTEM_BPFTOOL for system bpftool

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

The feature test for system bpftool uses BPFTOOL as the variable to set
its path, defaulting to just "bpftool" if not set by the user.

This conflicts with selftests and a few other utilities, which expect
BPFTOOL to be set to the in-tree bpftool path by default. For example,
bpftool selftests fail to build:

$ make -C tools/testing/selftests/bpf/
make: Entering directory '/home/tglozar/dev/linux/tools/testing/selftests/bpf'

make: *** No rule to make target 'bpftool', needed by '/home/tglozar/dev/linux/tools/testing/selftests/bpf/tools/include/vmlinux.h'.  Stop.
make: Leaving directory '/home/tglozar/dev/linux/tools/testing/selftests/bpf'

Fix the problem by renaming the variable used for system bpftool from
BPFTOOL to SYSTEM_BPFTOOL, so that the new usage does not conflict with
the existing one of BPFTOOL.

Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250326004018.248357-1-tglozar@redhat.com
Fixes: 8a635c3856dd ("tools/build: Add bpftool-skeletons feature test")
Closes: https://lore.kernel.org/linux-kernel/5df6968a-2e5f-468e-b457-fc201535dd4c@linux.ibm.com/
Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Suggested-by: Quentin Monnet <qmo@kernel.org>
Acked-by: Quentin Monnet <qmo@kernel.org>
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/build/feature/Makefile   | 2 +-
 tools/scripts/Makefile.include | 2 +-
 tools/tracing/rtla/Makefile    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 4f9c1d950f5d..b8b5fb183dd4 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -419,7 +419,7 @@ $(OUTPUT)test-libpfm4.bin:
 	$(BUILD) -lpfm
 
 $(OUTPUT)test-bpftool-skeletons.bin:
-	$(BPFTOOL) version | grep '^features:.*skeletons' \
+	$(SYSTEM_BPFTOOL) version | grep '^features:.*skeletons' \
 		> $(@:.bin=.make.output) 2>&1
 ###############################
 
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index 71bbe52721b3..34a33c1ad96c 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -92,7 +92,7 @@ LLVM_OBJCOPY	?= llvm-objcopy
 LLVM_STRIP	?= llvm-strip
 
 # Some tools require bpftool
-BPFTOOL		?= bpftool
+SYSTEM_BPFTOOL	?= bpftool
 
 ifeq ($(CC_NO_CLANG), 1)
 EXTRA_WARNINGS += -Wstrict-aliasing=3
diff --git a/tools/tracing/rtla/Makefile b/tools/tracing/rtla/Makefile
index 557af322be61..3dc050317b9d 100644
--- a/tools/tracing/rtla/Makefile
+++ b/tools/tracing/rtla/Makefile
@@ -78,7 +78,7 @@ src/timerlat.bpf.o: src/timerlat.bpf.c
 	$(QUIET_CLANG)$(CLANG) -g -O2 -target bpf -c $(filter %.c,$^) -o $@
 
 src/timerlat.skel.h: src/timerlat.bpf.o
-	$(QUIET_GENSKEL)$(BPFTOOL) gen skeleton $< > $@
+	$(QUIET_GENSKEL)$(SYSTEM_BPFTOOL) gen skeleton $< > $@
 else
 src/timerlat.skel.h:
 	$(Q)echo '/* BPF skeleton is disabled */' > src/timerlat.skel.h
-- 
2.47.2

[for-next][PATCH 2/9] rtla: Fix segfault in save_trace_to_file call

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

Running rtla with exit on threshold, but without saving trace leads to a
segmenetation fault:

$ rtla timerlat hist -T 10
...
Max timerlat IRQ latency from idle: 4.29 us in cpu 0
Segmentation fault

This is caused by null pointer deference in the call of
save_trace_to_file, which attempts to dereference an uninitialized
osnoise_tool variable:

save_trace_to_file(record->trace.inst, params->trace_output);
                   ^ this is uninitialized if params->trace_output is
                     not set

Fix this by not attempting to dereference "record" if it is NULL and
passing NULL instead. As a safety measure, the first field is also
checked for NULL inside save_trace_to_file.

Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Cc: Costa Shulyupin <costa.shul@redhat.com>
Link: https://lore.kernel.org/20250313141034.299117-1-tglozar@redhat.com
Fixes: dc4d4e7c72d1 ("rtla: Refactor save_trace_to_file")
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/src/osnoise_hist.c  | 3 ++-
 tools/tracing/rtla/src/osnoise_top.c   | 3 ++-
 tools/tracing/rtla/src/timerlat_hist.c | 3 ++-
 tools/tracing/rtla/src/timerlat_top.c  | 3 ++-
 tools/tracing/rtla/src/trace.c         | 2 +-
 5 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index 7c6ef67ef3e6..f4c9051c33c4 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -983,7 +983,8 @@ int osnoise_hist_main(int argc, char *argv[])
 
 	if (osnoise_trace_is_off(tool, record)) {
 		printf("rtla osnoise hit stop tracing\n");
-		save_trace_to_file(record->trace.inst, params->trace_output);
+		save_trace_to_file(record ? record->trace.inst : NULL,
+				   params->trace_output);
 	}
 
 out_hist:
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index 0eeefbbbf317..dacec2f99017 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -813,7 +813,8 @@ int osnoise_top_main(int argc, char **argv)
 
 	if (osnoise_trace_is_off(tool, record)) {
 		printf("osnoise hit stop tracing\n");
-		save_trace_to_file(record->trace.inst, params->trace_output);
+		save_trace_to_file(record ? record->trace.inst : NULL,
+				   params->trace_output);
 	}
 
 out_top:
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c
index 93d0c9e45020..822c068b4776 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -1473,7 +1473,8 @@ int timerlat_hist_main(int argc, char *argv[])
 		if (!params->no_aa)
 			timerlat_auto_analysis(params->stop_us, params->stop_total_us);
 
-		save_trace_to_file(record->trace.inst, params->trace_output);
+		save_trace_to_file(record ? record->trace.inst : NULL,
+				   params->trace_output);
 	}
 
 out_hist:
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index 3894ac37d81c..c3196a0bb585 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -1295,7 +1295,8 @@ int timerlat_top_main(int argc, char *argv[])
 		if (!params->no_aa)
 			timerlat_auto_analysis(params->stop_us, params->stop_total_us);
 
-		save_trace_to_file(record->trace.inst, params->trace_output);
+		save_trace_to_file(record ? record->trace.inst : NULL,
+				   params->trace_output);
 	} else if (params->aa_only) {
 		/*
 		 * If the trace did not stop with --aa-only, at least print the
diff --git a/tools/tracing/rtla/src/trace.c b/tools/tracing/rtla/src/trace.c
index 74ed2f6208ba..69cbc48d53d3 100644
--- a/tools/tracing/rtla/src/trace.c
+++ b/tools/tracing/rtla/src/trace.c
@@ -75,7 +75,7 @@ int save_trace_to_file(struct tracefs_instance *inst, const char *filename)
 	int out_fd, in_fd;
 	int retval = -1;
 
-	if (!filename)
+	if (!inst || !filename)
 		return 0;
 
 	in_fd = tracefs_instance_file_open(inst, file, O_RDONLY);
-- 
2.47.2

[for-next][PATCH 3/9] rtla/osnoise: Unify params struct

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

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 <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-2-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/src/osnoise.c      |  1 -
 tools/tracing/rtla/src/osnoise.h      | 47 +++++++++++++++++++++++
 tools/tracing/rtla/src/osnoise_hist.c | 52 ++++++--------------------
 tools/tracing/rtla/src/osnoise_top.c  | 54 +++++----------------------
 tools/tracing/rtla/src/timerlat.h     |  1 -
 5 files changed, 68 insertions(+), 87 deletions(-)

diff --git a/tools/tracing/rtla/src/osnoise.c b/tools/tracing/rtla/src/osnoise.c
index 85f398b89597..93d485c0e949 100644
--- a/tools/tracing/rtla/src/osnoise.c
+++ b/tools/tracing/rtla/src/osnoise.c
@@ -14,7 +14,6 @@
 #include <stdio.h>
 
 #include "osnoise.h"
-#include "utils.h"
 
 /*
  * osnoise_get_cpus - return the original "osnoise/cpus" content
diff --git a/tools/tracing/rtla/src/osnoise.h b/tools/tracing/rtla/src/osnoise.h
index 056c8b113dee..f78ffbdc8c8d 100644
--- a/tools/tracing/rtla/src/osnoise.h
+++ b/tools/tracing/rtla/src/osnoise.h
@@ -1,8 +1,55 @@
 // SPDX-License-Identifier: GPL-2.0
 #pragma once
 
+#include "utils.h"
 #include "trace.h"
 
+enum osnoise_mode {
+	MODE_OSNOISE = 0,
+	MODE_HWNOISE
+};
+
+struct osnoise_params {
+	/* Common params */
+	char			*cpus;
+	cpu_set_t		monitored_cpus;
+	char			*trace_output;
+	char			*cgroup_name;
+	unsigned long long	runtime;
+	unsigned long long	period;
+	long long		threshold;
+	long long		stop_us;
+	long long		stop_total_us;
+	int			sleep_time;
+	int			duration;
+	int			set_sched;
+	int			cgroup;
+	int			hk_cpus;
+	cpu_set_t		hk_cpu_set;
+	struct sched_attr	sched_param;
+	struct trace_events	*events;
+	int			warmup;
+	int			buffer_size;
+	union {
+		struct {
+			/* top only */
+			int			quiet;
+			int			pretty_output;
+			enum osnoise_mode	mode;
+		};
+		struct {
+			/* hist only */
+			int			output_divisor;
+			char			no_header;
+			char			no_summary;
+			char			no_index;
+			char			with_zeros;
+			int			bucket_size;
+			int			entries;
+		};
+	};
+};
+
 /*
  * osnoise_context - read, store, write, restore osnoise configs.
  */
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index f4c9051c33c4..4721f15f77cd 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -14,38 +14,8 @@
 #include <time.h>
 #include <sched.h>
 
-#include "utils.h"
 #include "osnoise.h"
 
-struct osnoise_hist_params {
-	char			*cpus;
-	cpu_set_t		monitored_cpus;
-	char			*trace_output;
-	char			*cgroup_name;
-	unsigned long long	runtime;
-	unsigned long long	period;
-	long long		threshold;
-	long long		stop_us;
-	long long		stop_total_us;
-	int			sleep_time;
-	int			duration;
-	int			set_sched;
-	int			output_divisor;
-	int			cgroup;
-	int			hk_cpus;
-	cpu_set_t		hk_cpu_set;
-	struct sched_attr	sched_param;
-	struct trace_events	*events;
-	char			no_header;
-	char			no_summary;
-	char			no_index;
-	char			with_zeros;
-	int			bucket_size;
-	int			entries;
-	int			warmup;
-	int			buffer_size;
-};
-
 struct osnoise_hist_cpu {
 	int			*samples;
 	int			count;
@@ -126,7 +96,7 @@ static struct osnoise_hist_data
 static void osnoise_hist_update_multiple(struct osnoise_tool *tool, int cpu,
 					 unsigned long long duration, int count)
 {
-	struct osnoise_hist_params *params = tool->params;
+	struct osnoise_params *params = tool->params;
 	struct osnoise_hist_data *data = tool->data;
 	unsigned long long total_duration;
 	int entries = data->entries;
@@ -168,7 +138,7 @@ static void osnoise_destroy_trace_hist(struct osnoise_tool *tool)
  */
 static int osnoise_init_trace_hist(struct osnoise_tool *tool)
 {
-	struct osnoise_hist_params *params = tool->params;
+	struct osnoise_params *params = tool->params;
 	struct osnoise_hist_data *data = tool->data;
 	int bucket_size;
 	char buff[128];
@@ -253,7 +223,7 @@ static void osnoise_read_trace_hist(struct osnoise_tool *tool)
  */
 static void osnoise_hist_header(struct osnoise_tool *tool)
 {
-	struct osnoise_hist_params *params = tool->params;
+	struct osnoise_params *params = tool->params;
 	struct osnoise_hist_data *data = tool->data;
 	struct trace_seq *s = tool->trace.seq;
 	char duration[26];
@@ -292,7 +262,7 @@ static void osnoise_hist_header(struct osnoise_tool *tool)
  * osnoise_print_summary - print the summary of the hist data to the output
  */
 static void
-osnoise_print_summary(struct osnoise_hist_params *params,
+osnoise_print_summary(struct osnoise_params *params,
 		       struct trace_instance *trace,
 		       struct osnoise_hist_data *data)
 {
@@ -370,7 +340,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
  * osnoise_print_stats - print data for all CPUs
  */
 static void
-osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *tool)
+osnoise_print_stats(struct osnoise_params *params, struct osnoise_tool *tool)
 {
 	struct osnoise_hist_data *data = tool->data;
 	struct trace_instance *trace = &tool->trace;
@@ -508,10 +478,10 @@ static void osnoise_hist_usage(char *usage)
 /*
  * osnoise_hist_parse_args - allocs, parse and fill the cmd line parameters
  */
-static struct osnoise_hist_params
+static struct osnoise_params
 *osnoise_hist_parse_args(int argc, char *argv[])
 {
-	struct osnoise_hist_params *params;
+	struct osnoise_params *params;
 	struct trace_events *tevent;
 	int retval;
 	int c;
@@ -731,7 +701,7 @@ static struct osnoise_hist_params
  * osnoise_hist_apply_config - apply the hist configs to the initialized tool
  */
 static int
-osnoise_hist_apply_config(struct osnoise_tool *tool, struct osnoise_hist_params *params)
+osnoise_hist_apply_config(struct osnoise_tool *tool, struct osnoise_params *params)
 {
 	int retval;
 
@@ -808,7 +778,7 @@ osnoise_hist_apply_config(struct osnoise_tool *tool, struct osnoise_hist_params
  * osnoise_init_hist - initialize a osnoise hist tool with parameters
  */
 static struct osnoise_tool
-*osnoise_init_hist(struct osnoise_hist_params *params)
+*osnoise_init_hist(struct osnoise_params *params)
 {
 	struct osnoise_tool *tool;
 	int nr_cpus;
@@ -842,7 +812,7 @@ static void stop_hist(int sig)
  * osnoise_hist_set_signals - handles the signal to stop the tool
  */
 static void
-osnoise_hist_set_signals(struct osnoise_hist_params *params)
+osnoise_hist_set_signals(struct osnoise_params *params)
 {
 	signal(SIGINT, stop_hist);
 	if (params->duration) {
@@ -853,7 +823,7 @@ osnoise_hist_set_signals(struct osnoise_hist_params *params)
 
 int osnoise_hist_main(int argc, char *argv[])
 {
-	struct osnoise_hist_params *params;
+	struct osnoise_params *params;
 	struct osnoise_tool *record = NULL;
 	struct osnoise_tool *tool = NULL;
 	struct trace_instance *trace;
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index dacec2f99017..7f393019bbf5 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -14,40 +14,6 @@
 #include <sched.h>
 
 #include "osnoise.h"
-#include "utils.h"
-
-enum osnoise_mode {
-	MODE_OSNOISE = 0,
-	MODE_HWNOISE
-};
-
-/*
- * osnoise top parameters
- */
-struct osnoise_top_params {
-	char			*cpus;
-	cpu_set_t		monitored_cpus;
-	char			*trace_output;
-	char			*cgroup_name;
-	unsigned long long	runtime;
-	unsigned long long	period;
-	long long		threshold;
-	long long		stop_us;
-	long long		stop_total_us;
-	int			sleep_time;
-	int			duration;
-	int			quiet;
-	int			set_sched;
-	int			cgroup;
-	int			hk_cpus;
-	int			warmup;
-	int			buffer_size;
-	int			pretty_output;
-	cpu_set_t		hk_cpu_set;
-	struct sched_attr	sched_param;
-	struct trace_events	*events;
-	enum osnoise_mode	mode;
-};
 
 struct osnoise_top_cpu {
 	unsigned long long	sum_runtime;
@@ -158,7 +124,7 @@ osnoise_top_handler(struct trace_seq *s, struct tep_record *record,
  */
 static void osnoise_top_header(struct osnoise_tool *top)
 {
-	struct osnoise_top_params *params = top->params;
+	struct osnoise_params *params = top->params;
 	struct trace_seq *s = top->trace.seq;
 	char duration[26];
 
@@ -218,7 +184,7 @@ static void clear_terminal(struct trace_seq *seq)
  */
 static void osnoise_top_print(struct osnoise_tool *tool, int cpu)
 {
-	struct osnoise_top_params *params = tool->params;
+	struct osnoise_params *params = tool->params;
 	struct trace_seq *s = tool->trace.seq;
 	struct osnoise_top_cpu *cpu_data;
 	struct osnoise_top_data *data;
@@ -258,7 +224,7 @@ static void osnoise_top_print(struct osnoise_tool *tool, int cpu)
  * osnoise_print_stats - print data for all cpus
  */
 static void
-osnoise_print_stats(struct osnoise_top_params *params, struct osnoise_tool *top)
+osnoise_print_stats(struct osnoise_params *params, struct osnoise_tool *top)
 {
 	struct trace_instance *trace = &top->trace;
 	static int nr_cpus = -1;
@@ -286,7 +252,7 @@ osnoise_print_stats(struct osnoise_top_params *params, struct osnoise_tool *top)
 /*
  * osnoise_top_usage - prints osnoise top usage message
  */
-static void osnoise_top_usage(struct osnoise_top_params *params, char *usage)
+static void osnoise_top_usage(struct osnoise_params *params, char *usage)
 {
 	int i;
 
@@ -354,9 +320,9 @@ static void osnoise_top_usage(struct osnoise_top_params *params, char *usage)
 /*
  * osnoise_top_parse_args - allocs, parse and fill the cmd line parameters
  */
-struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv)
+struct osnoise_params *osnoise_top_parse_args(int argc, char **argv)
 {
-	struct osnoise_top_params *params;
+	struct osnoise_params *params;
 	struct trace_events *tevent;
 	int retval;
 	int c;
@@ -553,7 +519,7 @@ struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv)
  * osnoise_top_apply_config - apply the top configs to the initialized tool
  */
 static int
-osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_top_params *params)
+osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_params *params)
 {
 	int retval;
 
@@ -640,7 +606,7 @@ osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_top_params *p
 /*
  * osnoise_init_top - initialize a osnoise top tool with parameters
  */
-struct osnoise_tool *osnoise_init_top(struct osnoise_top_params *params)
+struct osnoise_tool *osnoise_init_top(struct osnoise_params *params)
 {
 	struct osnoise_tool *tool;
 	int nr_cpus;
@@ -674,7 +640,7 @@ static void stop_top(int sig)
 /*
  * osnoise_top_set_signals - handles the signal to stop the tool
  */
-static void osnoise_top_set_signals(struct osnoise_top_params *params)
+static void osnoise_top_set_signals(struct osnoise_params *params)
 {
 	signal(SIGINT, stop_top);
 	if (params->duration) {
@@ -685,7 +651,7 @@ static void osnoise_top_set_signals(struct osnoise_top_params *params)
 
 int osnoise_top_main(int argc, char **argv)
 {
-	struct osnoise_top_params *params;
+	struct osnoise_params *params;
 	struct osnoise_tool *record = NULL;
 	struct osnoise_tool *tool = NULL;
 	struct trace_instance *trace;
diff --git a/tools/tracing/rtla/src/timerlat.h b/tools/tracing/rtla/src/timerlat.h
index e452d385cb0f..cadc613dc82e 100644
--- a/tools/tracing/rtla/src/timerlat.h
+++ b/tools/tracing/rtla/src/timerlat.h
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#include "utils.h"
 #include "osnoise.h"
 
 struct timerlat_params {
-- 
2.47.2

[for-next][PATCH 4/9] rtla: Unify apply_config between top and hist

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

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 <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-3-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/src/osnoise.c       |  79 ++++++++++++++++
 tools/tracing/rtla/src/osnoise.h       |   1 +
 tools/tracing/rtla/src/osnoise_hist.c  |  66 +-------------
 tools/tracing/rtla/src/osnoise_top.c   |  66 +-------------
 tools/tracing/rtla/src/timerlat.c      | 109 ++++++++++++++++++++++
 tools/tracing/rtla/src/timerlat.h      |  11 +--
 tools/tracing/rtla/src/timerlat_hist.c | 119 ++++---------------------
 tools/tracing/rtla/src/timerlat_top.c  | 110 +++--------------------
 8 files changed, 227 insertions(+), 334 deletions(-)

diff --git a/tools/tracing/rtla/src/osnoise.c b/tools/tracing/rtla/src/osnoise.c
index 93d485c0e949..1735a36466c4 100644
--- a/tools/tracing/rtla/src/osnoise.c
+++ b/tools/tracing/rtla/src/osnoise.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org>
  */
 
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <pthread.h>
@@ -12,6 +13,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
+#include <sched.h>
 
 #include "osnoise.h"
 
@@ -1114,6 +1116,83 @@ osnoise_report_missed_events(struct osnoise_tool *tool)
 	}
 }
 
+/*
+ * osnoise_apply_config - apply common configs to the initialized tool
+ */
+int
+osnoise_apply_config(struct osnoise_tool *tool, struct osnoise_params *params)
+{
+	int retval;
+
+	if (!params->sleep_time)
+		params->sleep_time = 1;
+
+	if (params->cpus) {
+		retval = osnoise_set_cpus(tool->context, params->cpus);
+		if (retval) {
+			err_msg("Failed to apply CPUs config\n");
+			goto out_err;
+		}
+	}
+
+	if (params->runtime || params->period) {
+		retval = osnoise_set_runtime_period(tool->context,
+						    params->runtime,
+						    params->period);
+		if (retval) {
+			err_msg("Failed to set runtime and/or period\n");
+			goto out_err;
+		}
+	}
+
+	if (params->stop_us) {
+		retval = osnoise_set_stop_us(tool->context, params->stop_us);
+		if (retval) {
+			err_msg("Failed to set stop us\n");
+			goto out_err;
+		}
+	}
+
+	if (params->stop_total_us) {
+		retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
+		if (retval) {
+			err_msg("Failed to set stop total us\n");
+			goto out_err;
+		}
+	}
+
+	if (params->threshold) {
+		retval = osnoise_set_tracing_thresh(tool->context, params->threshold);
+		if (retval) {
+			err_msg("Failed to set tracing_thresh\n");
+			goto out_err;
+		}
+	}
+
+	if (params->hk_cpus) {
+		retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
+					   &params->hk_cpu_set);
+		if (retval == -1) {
+			err_msg("Failed to set rtla to the house keeping CPUs\n");
+			goto out_err;
+		}
+	} else if (params->cpus) {
+		/*
+		 * Even if the user do not set a house-keeping CPU, try to
+		 * move rtla to a CPU set different to the one where the user
+		 * set the workload to run.
+		 *
+		 * No need to check results as this is an automatic attempt.
+		 */
+		auto_house_keeping(&params->monitored_cpus);
+	}
+
+	return 0;
+
+out_err:
+	return -1;
+}
+
 static void osnoise_usage(int err)
 {
 	int i;
diff --git a/tools/tracing/rtla/src/osnoise.h b/tools/tracing/rtla/src/osnoise.h
index f78ffbdc8c8d..ac1c99910744 100644
--- a/tools/tracing/rtla/src/osnoise.h
+++ b/tools/tracing/rtla/src/osnoise.h
@@ -155,6 +155,7 @@ struct osnoise_tool *osnoise_init_tool(char *tool_name);
 struct osnoise_tool *osnoise_init_trace_tool(char *tracer);
 void osnoise_report_missed_events(struct osnoise_tool *tool);
 bool osnoise_trace_is_off(struct osnoise_tool *tool, struct osnoise_tool *record);
+int osnoise_apply_config(struct osnoise_tool *tool, struct osnoise_params *params);
 
 int osnoise_hist_main(int argc, char *argv[]);
 int osnoise_top_main(int argc, char **argv);
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index 4721f15f77cd..d9d15c8f27c7 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -12,7 +12,6 @@
 #include <errno.h>
 #include <stdio.h>
 #include <time.h>
-#include <sched.h>
 
 #include "osnoise.h"
 
@@ -705,68 +704,9 @@ osnoise_hist_apply_config(struct osnoise_tool *tool, struct osnoise_params *para
 {
 	int retval;
 
-	if (!params->sleep_time)
-		params->sleep_time = 1;
-
-	if (params->cpus) {
-		retval = osnoise_set_cpus(tool->context, params->cpus);
-		if (retval) {
-			err_msg("Failed to apply CPUs config\n");
-			goto out_err;
-		}
-	}
-
-	if (params->runtime || params->period) {
-		retval = osnoise_set_runtime_period(tool->context,
-						    params->runtime,
-						    params->period);
-		if (retval) {
-			err_msg("Failed to set runtime and/or period\n");
-			goto out_err;
-		}
-	}
-
-	if (params->stop_us) {
-		retval = osnoise_set_stop_us(tool->context, params->stop_us);
-		if (retval) {
-			err_msg("Failed to set stop us\n");
-			goto out_err;
-		}
-	}
-
-	if (params->stop_total_us) {
-		retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
-		if (retval) {
-			err_msg("Failed to set stop total us\n");
-			goto out_err;
-		}
-	}
-
-	if (params->threshold) {
-		retval = osnoise_set_tracing_thresh(tool->context, params->threshold);
-		if (retval) {
-			err_msg("Failed to set tracing_thresh\n");
-			goto out_err;
-		}
-	}
-
-	if (params->hk_cpus) {
-		retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
-					   &params->hk_cpu_set);
-		if (retval == -1) {
-			err_msg("Failed to set rtla to the house keeping CPUs\n");
-			goto out_err;
-		}
-	} else if (params->cpus) {
-		/*
-		 * Even if the user do not set a house-keeping CPU, try to
-		 * move rtla to a CPU set different to the one where the user
-		 * set the workload to run.
-		 *
-		 * No need to check results as this is an automatic attempt.
-		 */
-		auto_house_keeping(&params->monitored_cpus);
-	}
+	retval = osnoise_apply_config(tool, params);
+	if (retval)
+		goto out_err;
 
 	return 0;
 
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index 7f393019bbf5..3455ee73e2e6 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -11,7 +11,6 @@
 #include <unistd.h>
 #include <stdio.h>
 #include <time.h>
-#include <sched.h>
 
 #include "osnoise.h"
 
@@ -523,50 +522,9 @@ osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_params *param
 {
 	int retval;
 
-	if (!params->sleep_time)
-		params->sleep_time = 1;
-
-	if (params->cpus) {
-		retval = osnoise_set_cpus(tool->context, params->cpus);
-		if (retval) {
-			err_msg("Failed to apply CPUs config\n");
-			goto out_err;
-		}
-	}
-
-	if (params->runtime || params->period) {
-		retval = osnoise_set_runtime_period(tool->context,
-						    params->runtime,
-						    params->period);
-		if (retval) {
-			err_msg("Failed to set runtime and/or period\n");
-			goto out_err;
-		}
-	}
-
-	if (params->stop_us) {
-		retval = osnoise_set_stop_us(tool->context, params->stop_us);
-		if (retval) {
-			err_msg("Failed to set stop us\n");
-			goto out_err;
-		}
-	}
-
-	if (params->stop_total_us) {
-		retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
-		if (retval) {
-			err_msg("Failed to set stop total us\n");
-			goto out_err;
-		}
-	}
-
-	if (params->threshold) {
-		retval = osnoise_set_tracing_thresh(tool->context, params->threshold);
-		if (retval) {
-			err_msg("Failed to set tracing_thresh\n");
-			goto out_err;
-		}
-	}
+	retval = osnoise_apply_config(tool, params);
+	if (retval)
+		goto out_err;
 
 	if (params->mode == MODE_HWNOISE) {
 		retval = osnoise_set_irq_disable(tool->context, 1);
@@ -576,24 +534,6 @@ osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_params *param
 		}
 	}
 
-	if (params->hk_cpus) {
-		retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
-					   &params->hk_cpu_set);
-		if (retval == -1) {
-			err_msg("Failed to set rtla to the house keeping CPUs\n");
-			goto out_err;
-		}
-	} else if (params->cpus) {
-		/*
-		 * Even if the user do not set a house-keeping CPU, try to
-		 * move rtla to a CPU set different to the one where the user
-		 * set the workload to run.
-		 *
-		 * No need to check results as this is an automatic attempt.
-		 */
-		auto_house_keeping(&params->monitored_cpus);
-	}
-
 	if (isatty(STDOUT_FILENO) && !params->quiet)
 		params->pretty_output = 1;
 
diff --git a/tools/tracing/rtla/src/timerlat.c b/tools/tracing/rtla/src/timerlat.c
index 21cdcc5c4a29..448fb1f7d3a6 100644
--- a/tools/tracing/rtla/src/timerlat.c
+++ b/tools/tracing/rtla/src/timerlat.c
@@ -2,6 +2,7 @@
 /*
  * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org>
  */
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <pthread.h>
@@ -11,9 +12,117 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
+#include <sched.h>
 
 #include "timerlat.h"
 
+/*
+ * timerlat_apply_config - apply common configs to the initialized tool
+ */
+int
+timerlat_apply_config(struct osnoise_tool *tool, struct timerlat_params *params)
+{
+	int retval, i;
+
+	if (!params->sleep_time)
+		params->sleep_time = 1;
+
+	if (params->cpus) {
+		retval = osnoise_set_cpus(tool->context, params->cpus);
+		if (retval) {
+			err_msg("Failed to apply CPUs config\n");
+			goto out_err;
+		}
+	} else {
+		for (i = 0; i < sysconf(_SC_NPROCESSORS_CONF); i++)
+			CPU_SET(i, &params->monitored_cpus);
+	}
+
+	if (params->stop_us) {
+		retval = osnoise_set_stop_us(tool->context, params->stop_us);
+		if (retval) {
+			err_msg("Failed to set stop us\n");
+			goto out_err;
+		}
+	}
+
+	if (params->stop_total_us) {
+		retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
+		if (retval) {
+			err_msg("Failed to set stop total us\n");
+			goto out_err;
+		}
+	}
+
+
+	if (params->timerlat_period_us) {
+		retval = osnoise_set_timerlat_period_us(tool->context, params->timerlat_period_us);
+		if (retval) {
+			err_msg("Failed to set timerlat period\n");
+			goto out_err;
+		}
+	}
+
+
+	if (params->print_stack) {
+		retval = osnoise_set_print_stack(tool->context, params->print_stack);
+		if (retval) {
+			err_msg("Failed to set print stack\n");
+			goto out_err;
+		}
+	}
+
+	if (params->hk_cpus) {
+		retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
+					   &params->hk_cpu_set);
+		if (retval == -1) {
+			err_msg("Failed to set rtla to the house keeping CPUs\n");
+			goto out_err;
+		}
+	} else if (params->cpus) {
+		/*
+		 * Even if the user do not set a house-keeping CPU, try to
+		 * move rtla to a CPU set different to the one where the user
+		 * set the workload to run.
+		 *
+		 * No need to check results as this is an automatic attempt.
+		 */
+		auto_house_keeping(&params->monitored_cpus);
+	}
+
+	/*
+	 * If the user did not specify a type of thread, try user-threads first.
+	 * Fall back to kernel threads otherwise.
+	 */
+	if (!params->kernel_workload && !params->user_data) {
+		retval = tracefs_file_exists(NULL, "osnoise/per_cpu/cpu0/timerlat_fd");
+		if (retval) {
+			debug_msg("User-space interface detected, setting user-threads\n");
+			params->user_workload = 1;
+			params->user_data = 1;
+		} else {
+			debug_msg("User-space interface not detected, setting kernel-threads\n");
+			params->kernel_workload = 1;
+		}
+	}
+
+	/*
+	 * Set workload according to type of thread if the kernel supports it.
+	 * On kernels without support, user threads will have already failed
+	 * on missing timerlat_fd, and kernel threads do not need it.
+	 */
+	retval = osnoise_set_workload(tool->context, params->kernel_workload);
+	if (retval < -1) {
+		err_msg("Failed to set OSNOISE_WORKLOAD option\n");
+		goto out_err;
+	}
+
+	return 0;
+
+out_err:
+	return -1;
+}
+
 static void timerlat_usage(int err)
 {
 	int i;
diff --git a/tools/tracing/rtla/src/timerlat.h b/tools/tracing/rtla/src/timerlat.h
index cadc613dc82e..73045aef23fa 100644
--- a/tools/tracing/rtla/src/timerlat.h
+++ b/tools/tracing/rtla/src/timerlat.h
@@ -15,17 +15,15 @@ struct timerlat_params {
 	int			sleep_time;
 	int			output_divisor;
 	int			duration;
-	int			quiet;
 	int			set_sched;
 	int			dma_latency;
 	int			no_aa;
-	int			aa_only;
 	int			dump_tasks;
 	int			cgroup;
 	int			hk_cpus;
 	int			user_workload;
 	int			kernel_workload;
-	int			pretty_output;
+	int			user_data;
 	int			warmup;
 	int			buffer_size;
 	int			deepest_idle_state;
@@ -35,11 +33,12 @@ struct timerlat_params {
 	union {
 		struct {
 			/* top only */
-			int			user_top;
+			int			quiet;
+			int			aa_only;
+			int			pretty_output;
 		};
 		struct {
 			/* hist only */
-			int			user_hist;
 			char			no_irq;
 			char			no_thread;
 			char			no_header;
@@ -52,6 +51,8 @@ struct timerlat_params {
 	};
 };
 
+int timerlat_apply_config(struct osnoise_tool *tool, struct timerlat_params *params);
+
 int timerlat_hist_main(int argc, char *argv[]);
 int timerlat_top_main(int argc, char *argv[]);
 int timerlat_main(int argc, char *argv[]);
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c
index 822c068b4776..9d9efeedc4c2 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -315,7 +315,7 @@ static void timerlat_hist_header(struct osnoise_tool *tool)
 		if (!params->no_thread)
 			trace_seq_printf(s, "   Thr-%03d", cpu);
 
-		if (params->user_hist)
+		if (params->user_data)
 			trace_seq_printf(s, "   Usr-%03d", cpu);
 	}
 	trace_seq_printf(s, "\n");
@@ -371,7 +371,7 @@ timerlat_print_summary(struct timerlat_params *params,
 			trace_seq_printf(trace->seq, "%9llu ",
 					data->hist[cpu].thread_count);
 
-		if (params->user_hist)
+		if (params->user_data)
 			trace_seq_printf(trace->seq, "%9llu ",
 					 data->hist[cpu].user_count);
 	}
@@ -399,7 +399,7 @@ timerlat_print_summary(struct timerlat_params *params,
 					     data->hist[cpu].min_thread,
 					     false);
 
-		if (params->user_hist)
+		if (params->user_data)
 			format_summary_value(trace->seq,
 					     data->hist[cpu].user_count,
 					     data->hist[cpu].min_user,
@@ -429,7 +429,7 @@ timerlat_print_summary(struct timerlat_params *params,
 					     data->hist[cpu].sum_thread,
 					     true);
 
-		if (params->user_hist)
+		if (params->user_data)
 			format_summary_value(trace->seq,
 					     data->hist[cpu].user_count,
 					     data->hist[cpu].sum_user,
@@ -459,7 +459,7 @@ timerlat_print_summary(struct timerlat_params *params,
 					     data->hist[cpu].max_thread,
 					     false);
 
-		if (params->user_hist)
+		if (params->user_data)
 			format_summary_value(trace->seq,
 					     data->hist[cpu].user_count,
 					     data->hist[cpu].max_user,
@@ -521,7 +521,7 @@ timerlat_print_stats_all(struct timerlat_params *params,
 	if (!params->no_thread)
 		trace_seq_printf(trace->seq, "       Thr");
 
-	if (params->user_hist)
+	if (params->user_data)
 		trace_seq_printf(trace->seq, "       Usr");
 
 	trace_seq_printf(trace->seq, "\n");
@@ -537,7 +537,7 @@ timerlat_print_stats_all(struct timerlat_params *params,
 		trace_seq_printf(trace->seq, "%9llu ",
 				 sum.thread_count);
 
-	if (params->user_hist)
+	if (params->user_data)
 		trace_seq_printf(trace->seq, "%9llu ",
 				 sum.user_count);
 
@@ -558,7 +558,7 @@ timerlat_print_stats_all(struct timerlat_params *params,
 				     sum.min_thread,
 				     false);
 
-	if (params->user_hist)
+	if (params->user_data)
 		format_summary_value(trace->seq,
 				     sum.user_count,
 				     sum.min_user,
@@ -581,7 +581,7 @@ timerlat_print_stats_all(struct timerlat_params *params,
 				     sum.sum_thread,
 				     true);
 
-	if (params->user_hist)
+	if (params->user_data)
 		format_summary_value(trace->seq,
 				     sum.user_count,
 				     sum.sum_user,
@@ -604,7 +604,7 @@ timerlat_print_stats_all(struct timerlat_params *params,
 				     sum.max_thread,
 				     false);
 
-	if (params->user_hist)
+	if (params->user_data)
 		format_summary_value(trace->seq,
 				     sum.user_count,
 				     sum.max_user,
@@ -654,7 +654,7 @@ timerlat_print_stats(struct timerlat_params *params, struct osnoise_tool *tool)
 						data->hist[cpu].thread[bucket]);
 			}
 
-			if (params->user_hist) {
+			if (params->user_data) {
 				total += data->hist[cpu].user[bucket];
 				trace_seq_printf(trace->seq, "%9d ",
 						data->hist[cpu].user[bucket]);
@@ -690,7 +690,7 @@ timerlat_print_stats(struct timerlat_params *params, struct osnoise_tool *tool)
 			trace_seq_printf(trace->seq, "%9d ",
 					 data->hist[cpu].thread[data->entries]);
 
-		if (params->user_hist)
+		if (params->user_data)
 			trace_seq_printf(trace->seq, "%9d ",
 					 data->hist[cpu].user[data->entries]);
 	}
@@ -965,7 +965,7 @@ static struct timerlat_params
 			params->user_workload = 1;
 			/* fallback: -u implies in -U */
 		case 'U':
-			params->user_hist = 1;
+			params->user_data = 1;
 			break;
 		case '0': /* no irq */
 			params->no_irq = 1;
@@ -1063,98 +1063,11 @@ static struct timerlat_params
 static int
 timerlat_hist_apply_config(struct osnoise_tool *tool, struct timerlat_params *params)
 {
-	int retval, i;
-
-	if (!params->sleep_time)
-		params->sleep_time = 1;
-
-	if (params->cpus) {
-		retval = osnoise_set_cpus(tool->context, params->cpus);
-		if (retval) {
-			err_msg("Failed to apply CPUs config\n");
-			goto out_err;
-		}
-	} else {
-		for (i = 0; i < sysconf(_SC_NPROCESSORS_CONF); i++)
-			CPU_SET(i, &params->monitored_cpus);
-	}
-
-	if (params->stop_us) {
-		retval = osnoise_set_stop_us(tool->context, params->stop_us);
-		if (retval) {
-			err_msg("Failed to set stop us\n");
-			goto out_err;
-		}
-	}
-
-	if (params->stop_total_us) {
-		retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
-		if (retval) {
-			err_msg("Failed to set stop total us\n");
-			goto out_err;
-		}
-	}
-
-	if (params->timerlat_period_us) {
-		retval = osnoise_set_timerlat_period_us(tool->context, params->timerlat_period_us);
-		if (retval) {
-			err_msg("Failed to set timerlat period\n");
-			goto out_err;
-		}
-	}
-
-	if (params->print_stack) {
-		retval = osnoise_set_print_stack(tool->context, params->print_stack);
-		if (retval) {
-			err_msg("Failed to set print stack\n");
-			goto out_err;
-		}
-	}
-
-	if (params->hk_cpus) {
-		retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
-					   &params->hk_cpu_set);
-		if (retval == -1) {
-			err_msg("Failed to set rtla to the house keeping CPUs\n");
-			goto out_err;
-		}
-	} else if (params->cpus) {
-		/*
-		 * Even if the user do not set a house-keeping CPU, try to
-		 * move rtla to a CPU set different to the one where the user
-		 * set the workload to run.
-		 *
-		 * No need to check results as this is an automatic attempt.
-		 */
-		auto_house_keeping(&params->monitored_cpus);
-	}
-
-	/*
-	 * If the user did not specify a type of thread, try user-threads first.
-	 * Fall back to kernel threads otherwise.
-	 */
-	if (!params->kernel_workload && !params->user_hist) {
-		retval = tracefs_file_exists(NULL, "osnoise/per_cpu/cpu0/timerlat_fd");
-		if (retval) {
-			debug_msg("User-space interface detected, setting user-threads\n");
-			params->user_workload = 1;
-			params->user_hist = 1;
-		} else {
-			debug_msg("User-space interface not detected, setting kernel-threads\n");
-			params->kernel_workload = 1;
-		}
-	}
+	int retval;
 
-	/*
-	* Set workload according to type of thread if the kernel supports it.
-	* On kernels without support, user threads will have already failed
-	* on missing timerlat_fd, and kernel threads do not need it.
-	*/
-	retval = osnoise_set_workload(tool->context, params->kernel_workload);
-	if (retval < -1) {
-		err_msg("Failed to set OSNOISE_WORKLOAD option\n");
+	retval = timerlat_apply_config(tool, params);
+	if (retval)
 		goto out_err;
-	}
 
 	return 0;
 
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index c3196a0bb585..79cb6f28967f 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -266,7 +266,7 @@ static void timerlat_top_header(struct timerlat_params *params, struct osnoise_t
 		trace_seq_printf(s, "\033[2;37;40m");
 
 	trace_seq_printf(s, "                                     Timer Latency                                              ");
-	if (params->user_top)
+	if (params->user_data)
 		trace_seq_printf(s, "                                         ");
 
 	if (params->pretty_output)
@@ -277,7 +277,7 @@ static void timerlat_top_header(struct timerlat_params *params, struct osnoise_t
 			params->output_divisor == 1 ? "ns" : "us",
 			params->output_divisor == 1 ? "ns" : "us");
 
-	if (params->user_top) {
+	if (params->user_data) {
 		trace_seq_printf(s, "      |    Ret user Timer Latency (%s)",
 				params->output_divisor == 1 ? "ns" : "us");
 	}
@@ -287,7 +287,7 @@ static void timerlat_top_header(struct timerlat_params *params, struct osnoise_t
 		trace_seq_printf(s, "\033[2;30;47m");
 
 	trace_seq_printf(s, "CPU COUNT      |      cur       min       avg       max |      cur       min       avg       max");
-	if (params->user_top)
+	if (params->user_data)
 		trace_seq_printf(s, " |      cur       min       avg       max");
 
 	if (params->pretty_output)
@@ -338,7 +338,7 @@ static void timerlat_top_print(struct osnoise_tool *top, int cpu)
 		trace_seq_printf(s, "%9llu", cpu_data->max_thread);
 	}
 
-	if (!params->user_top) {
+	if (!params->user_data) {
 		trace_seq_printf(s, "\n");
 		return;
 	}
@@ -380,7 +380,7 @@ timerlat_top_print_sum(struct osnoise_tool *top, struct timerlat_top_cpu *summar
 	}
 
 	trace_seq_printf(s, "%.*s|%.*s|%.*s", 15, split, 40, split, 39, split);
-	if (params->user_top)
+	if (params->user_data)
 		trace_seq_printf(s, "-|%.*s", 39, split);
 	trace_seq_printf(s, "\n");
 
@@ -405,7 +405,7 @@ timerlat_top_print_sum(struct osnoise_tool *top, struct timerlat_top_cpu *summar
 		trace_seq_printf(s, "%9llu", summary->max_thread);
 	}
 
-	if (!params->user_top) {
+	if (!params->user_data) {
 		trace_seq_printf(s, "\n");
 		return;
 	}
@@ -722,7 +722,7 @@ static struct timerlat_params
 			params->user_workload = true;
 			/* fallback: -u implies -U */
 		case 'U':
-			params->user_top = true;
+			params->user_data = true;
 			break;
 		case '0': /* trigger */
 			if (params->events) {
@@ -800,100 +800,10 @@ static int
 timerlat_top_apply_config(struct osnoise_tool *top, struct timerlat_params *params)
 {
 	int retval;
-	int i;
-
-	if (!params->sleep_time)
-		params->sleep_time = 1;
-
-	if (params->cpus) {
-		retval = osnoise_set_cpus(top->context, params->cpus);
-		if (retval) {
-			err_msg("Failed to apply CPUs config\n");
-			goto out_err;
-		}
-	} else {
-		for (i = 0; i < sysconf(_SC_NPROCESSORS_CONF); i++)
-			CPU_SET(i, &params->monitored_cpus);
-	}
-
-	if (params->stop_us) {
-		retval = osnoise_set_stop_us(top->context, params->stop_us);
-		if (retval) {
-			err_msg("Failed to set stop us\n");
-			goto out_err;
-		}
-	}
-
-	if (params->stop_total_us) {
-		retval = osnoise_set_stop_total_us(top->context, params->stop_total_us);
-		if (retval) {
-			err_msg("Failed to set stop total us\n");
-			goto out_err;
-		}
-	}
-
-
-	if (params->timerlat_period_us) {
-		retval = osnoise_set_timerlat_period_us(top->context, params->timerlat_period_us);
-		if (retval) {
-			err_msg("Failed to set timerlat period\n");
-			goto out_err;
-		}
-	}
 
-
-	if (params->print_stack) {
-		retval = osnoise_set_print_stack(top->context, params->print_stack);
-		if (retval) {
-			err_msg("Failed to set print stack\n");
-			goto out_err;
-		}
-	}
-
-	if (params->hk_cpus) {
-		retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
-					   &params->hk_cpu_set);
-		if (retval == -1) {
-			err_msg("Failed to set rtla to the house keeping CPUs\n");
-			goto out_err;
-		}
-	} else if (params->cpus) {
-		/*
-		 * Even if the user do not set a house-keeping CPU, try to
-		 * move rtla to a CPU set different to the one where the user
-		 * set the workload to run.
-		 *
-		 * No need to check results as this is an automatic attempt.
-		 */
-		auto_house_keeping(&params->monitored_cpus);
-	}
-
-	/*
-	 * If the user did not specify a type of thread, try user-threads first.
-	 * Fall back to kernel threads otherwise.
-	 */
-	if (!params->kernel_workload && !params->user_top) {
-		retval = tracefs_file_exists(NULL, "osnoise/per_cpu/cpu0/timerlat_fd");
-		if (retval) {
-			debug_msg("User-space interface detected, setting user-threads\n");
-			params->user_workload = 1;
-			params->user_top = 1;
-		} else {
-			debug_msg("User-space interface not detected, setting kernel-threads\n");
-			params->kernel_workload = 1;
-		}
-	}
-
-	/*
-	* Set workload according to type of thread if the kernel supports it.
-	* On kernels without support, user threads will have already failed
-	* on missing timerlat_fd, and kernel threads do not need it.
-	*/
-	retval = osnoise_set_workload(top->context, params->kernel_workload);
-	if (retval < -1) {
-		err_msg("Failed to set OSNOISE_WORKLOAD option\n");
+	retval = timerlat_apply_config(top, params);
+	if (retval)
 		goto out_err;
-	}
 
 	if (isatty(STDOUT_FILENO) && !params->quiet)
 		params->pretty_output = 1;
@@ -1142,7 +1052,7 @@ int timerlat_top_main(int argc, char *argv[])
 		}
 	}
 
-	if (params->cgroup && !params->user_top) {
+	if (params->cgroup && !params->user_data) {
 		retval = set_comm_cgroup("timerlat/", params->cgroup_name);
 		if (!retval) {
 			err_msg("Failed to move threads to cgroup\n");
-- 
2.47.2

[for-next][PATCH 5/9] rtla/osnoise: Set OSNOISE_WORKLOAD to true

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

If running rtla osnoise with NO_OSNOISE_WORKLOAD, it reports no samples:

$ echo NO_OSNOISE_WORKLOAD > /sys/kernel/tracing/osnoise/options
$ rtla osnoise hist -d 10s
Index
over: 0
count: 0
min: 0
avg: 0
max: 0

This situation can also happen when running rtla-osnoise after an
improperly exited rtla-timerlat run.

Set OSNOISE_WORKLOAD in rtla-osnoise, too, similarly to what we
already did for timerlat in commit 217f0b1e990e ("rtla/timerlat_top: Set
OSNOISE_WORKLOAD for kernel threads") and commit d8d866171a41
("rtla/timerlat_hist: Set OSNOISE_WORKLOAD for kernel threads").

Note that there is no user workload mode for rtla-osnoise yet, so
OSNOISE_WORKLOAD is always set to true.

Cc: Luis Goncalves <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-4-tglozar@redhat.com
Fixes: 1eceb2fc2ca5 ("rtla/osnoise: Add osnoise top mode")
Fixes: 829a6c0b5698 ("rtla/osnoise: Add the hist mode")
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/src/osnoise.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/tracing/rtla/src/osnoise.c b/tools/tracing/rtla/src/osnoise.c
index 1735a36466c4..a71618d876e9 100644
--- a/tools/tracing/rtla/src/osnoise.c
+++ b/tools/tracing/rtla/src/osnoise.c
@@ -1187,6 +1187,12 @@ osnoise_apply_config(struct osnoise_tool *tool, struct osnoise_params *params)
 		auto_house_keeping(&params->monitored_cpus);
 	}
 
+	retval = osnoise_set_workload(tool->context, true);
+	if (retval < -1) {
+		err_msg("Failed to set OSNOISE_WORKLOAD option\n");
+		goto out_err;
+	}
+
 	return 0;
 
 out_err:
-- 
2.47.2

[for-next][PATCH 6/9] rtla: Always set all tracer options

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

rtla currently only sets tracer options that are explicitly set by the
user, with the exception of OSNOISE_WORKLOAD.

This leads to improper behavior in case rtla is run with those options
not set to the default value. rtla does reset them to the original
value upon exiting, but that does not protect it from starting with
non-default values set either by an improperly exited rtla or by another
user of the tracers.

For example, after running this command:

$ echo 1 > /sys/kernel/tracing/osnoise/stop_tracing_us

all runs of rtla will stop at the 1us threshold, even if not requested
by the user:

$ rtla osnoise hist
Index   CPU-000   CPU-001
1             8         5
2             5         9
3             1         2
4             6         1
5             2         1
6             0         1
8             1         1
12            0         1
14            1         0
15            1         0
over:         0         0
count:       25        21
min:          1         1
avg:       3.68      3.05
max:         15        12
rtla osnoise hit stop tracing

Fix the problem by setting the default value for all tracer options if
the user has not provided their own value.

For most of the options, it's enough to just drop the if clause checking
for the value being set. For cpus, "all" is used as the default value,
and for osnoise default period and runtime, default values of
the osnoise_data variable in trace_osnoise.c are used.

Cc: Luis Goncalves <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-5-tglozar@redhat.com
Fixes: 1eceb2fc2ca5 ("rtla/osnoise: Add osnoise top mode")
Fixes: 829a6c0b5698 ("rtla/osnoise: Add the hist mode")
Fixes: a828cd18bc4a ("rtla: Add timerlat tool and timelart top mode")
Fixes: 1eeb6328e8b3 ("rtla/timerlat: Add timerlat hist mode")
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/src/osnoise.c  | 56 ++++++++++++++---------------
 tools/tracing/rtla/src/timerlat.c | 59 +++++++++++++++----------------
 2 files changed, 56 insertions(+), 59 deletions(-)

diff --git a/tools/tracing/rtla/src/osnoise.c b/tools/tracing/rtla/src/osnoise.c
index a71618d876e9..2dc3e4539e99 100644
--- a/tools/tracing/rtla/src/osnoise.c
+++ b/tools/tracing/rtla/src/osnoise.c
@@ -17,6 +17,9 @@
 
 #include "osnoise.h"
 
+#define DEFAULT_SAMPLE_PERIOD	1000000			/* 1s */
+#define DEFAULT_SAMPLE_RUNTIME	1000000			/* 1s */
+
 /*
  * osnoise_get_cpus - return the original "osnoise/cpus" content
  *
@@ -1127,46 +1130,43 @@ osnoise_apply_config(struct osnoise_tool *tool, struct osnoise_params *params)
 	if (!params->sleep_time)
 		params->sleep_time = 1;
 
-	if (params->cpus) {
-		retval = osnoise_set_cpus(tool->context, params->cpus);
-		if (retval) {
-			err_msg("Failed to apply CPUs config\n");
-			goto out_err;
-		}
+	retval = osnoise_set_cpus(tool->context, params->cpus ? params->cpus : "all");
+	if (retval) {
+		err_msg("Failed to apply CPUs config\n");
+		goto out_err;
 	}
 
 	if (params->runtime || params->period) {
 		retval = osnoise_set_runtime_period(tool->context,
 						    params->runtime,
 						    params->period);
-		if (retval) {
-			err_msg("Failed to set runtime and/or period\n");
-			goto out_err;
-		}
+	} else {
+		retval = osnoise_set_runtime_period(tool->context,
+						    DEFAULT_SAMPLE_PERIOD,
+						    DEFAULT_SAMPLE_RUNTIME);
 	}
 
-	if (params->stop_us) {
-		retval = osnoise_set_stop_us(tool->context, params->stop_us);
-		if (retval) {
-			err_msg("Failed to set stop us\n");
-			goto out_err;
-		}
+	if (retval) {
+		err_msg("Failed to set runtime and/or period\n");
+		goto out_err;
 	}
 
-	if (params->stop_total_us) {
-		retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
-		if (retval) {
-			err_msg("Failed to set stop total us\n");
-			goto out_err;
-		}
+	retval = osnoise_set_stop_us(tool->context, params->stop_us);
+	if (retval) {
+		err_msg("Failed to set stop us\n");
+		goto out_err;
 	}
 
-	if (params->threshold) {
-		retval = osnoise_set_tracing_thresh(tool->context, params->threshold);
-		if (retval) {
-			err_msg("Failed to set tracing_thresh\n");
-			goto out_err;
-		}
+	retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
+	if (retval) {
+		err_msg("Failed to set stop total us\n");
+		goto out_err;
+	}
+
+	retval = osnoise_set_tracing_thresh(tool->context, params->threshold);
+	if (retval) {
+		err_msg("Failed to set tracing_thresh\n");
+		goto out_err;
 	}
 
 	if (params->hk_cpus) {
diff --git a/tools/tracing/rtla/src/timerlat.c b/tools/tracing/rtla/src/timerlat.c
index 448fb1f7d3a6..c29e2ba2d7d8 100644
--- a/tools/tracing/rtla/src/timerlat.c
+++ b/tools/tracing/rtla/src/timerlat.c
@@ -16,6 +16,8 @@
 
 #include "timerlat.h"
 
+#define DEFAULT_TIMERLAT_PERIOD	1000			/* 1ms */
+
 /*
  * timerlat_apply_config - apply common configs to the initialized tool
  */
@@ -27,49 +29,44 @@ timerlat_apply_config(struct osnoise_tool *tool, struct timerlat_params *params)
 	if (!params->sleep_time)
 		params->sleep_time = 1;
 
-	if (params->cpus) {
-		retval = osnoise_set_cpus(tool->context, params->cpus);
-		if (retval) {
-			err_msg("Failed to apply CPUs config\n");
-			goto out_err;
-		}
-	} else {
+	retval = osnoise_set_cpus(tool->context, params->cpus ? params->cpus : "all");
+	if (retval) {
+		err_msg("Failed to apply CPUs config\n");
+		goto out_err;
+	}
+
+	if (!params->cpus) {
 		for (i = 0; i < sysconf(_SC_NPROCESSORS_CONF); i++)
 			CPU_SET(i, &params->monitored_cpus);
 	}
 
-	if (params->stop_us) {
-		retval = osnoise_set_stop_us(tool->context, params->stop_us);
-		if (retval) {
-			err_msg("Failed to set stop us\n");
-			goto out_err;
-		}
+	retval = osnoise_set_stop_us(tool->context, params->stop_us);
+	if (retval) {
+		err_msg("Failed to set stop us\n");
+		goto out_err;
 	}
 
-	if (params->stop_total_us) {
-		retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
-		if (retval) {
-			err_msg("Failed to set stop total us\n");
-			goto out_err;
-		}
+	retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us);
+	if (retval) {
+		err_msg("Failed to set stop total us\n");
+		goto out_err;
 	}
 
 
-	if (params->timerlat_period_us) {
-		retval = osnoise_set_timerlat_period_us(tool->context, params->timerlat_period_us);
-		if (retval) {
-			err_msg("Failed to set timerlat period\n");
-			goto out_err;
-		}
+	retval = osnoise_set_timerlat_period_us(tool->context,
+						params->timerlat_period_us ?
+						params->timerlat_period_us :
+						DEFAULT_TIMERLAT_PERIOD);
+	if (retval) {
+		err_msg("Failed to set timerlat period\n");
+		goto out_err;
 	}
 
 
-	if (params->print_stack) {
-		retval = osnoise_set_print_stack(tool->context, params->print_stack);
-		if (retval) {
-			err_msg("Failed to set print stack\n");
-			goto out_err;
-		}
+	retval = osnoise_set_print_stack(tool->context, params->print_stack);
+	if (retval) {
+		err_msg("Failed to set print stack\n");
+		goto out_err;
 	}
 
 	if (params->hk_cpus) {
-- 
2.47.2

[for-next][PATCH 7/9] rtla/tests: Reset osnoise options before check

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

Remove any dangling tracing instances from previous improperly exited
runs of rtla, and reset osnoise options to default before running a test
case.

This ensures that the test results are deterministic. Specific test
cases checked that rtla behaves correctly even when the tracer state is
not clean will be added later.

Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-6-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/tests/engine.sh | 40 ++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/tools/tracing/rtla/tests/engine.sh b/tools/tracing/rtla/tests/engine.sh
index 64d0446dc28e..5db8aa4bc031 100644
--- a/tools/tracing/rtla/tests/engine.sh
+++ b/tools/tracing/rtla/tests/engine.sh
@@ -8,12 +8,44 @@ test_begin() {
 	[ -n "$TEST_COUNT" ] && echo "1..$TEST_COUNT"
 }
 
+reset_osnoise() {
+	# Reset osnoise options to default and remove any dangling instances created
+	# by improperly exited rtla runs.
+	pushd /sys/kernel/tracing || return 1
+
+	# Remove dangling instances created by previous rtla run
+	echo 0 > tracing_thresh
+	cd instances
+	for i in osnoise_top osnoise_hist timerlat_top timerlat_hist
+	do
+		[ ! -d "$i" ] && continue
+		rmdir "$i"
+	done
+
+	# Reset options to default
+	# Note: those are copied from the default values of osnoise_data
+	# in kernel/trace/trace_osnoise.c
+	cd ../osnoise
+	echo all > cpus
+	echo DEFAULTS > options
+	echo 1000000 > period_us
+	echo 0 > print_stack
+	echo 1000000 > runtime_us
+	echo 0 > stop_tracing_total_us
+	echo 0 > stop_tracing_us
+	echo 1000 > timerlat_period_us
+
+	popd
+}
+
 check() {
 	# Simple check: run rtla with given arguments and test exit code.
 	# If TEST_COUNT is set, run the test. Otherwise, just count.
 	ctr=$(($ctr + 1))
 	if [ -n "$TEST_COUNT" ]
 	then
+		# Reset osnoise options before running test.
+		[ "$NO_RESET_OSNOISE" == 1 ] || reset_osnoise
 		# Run rtla; in case of failure, include its output as comment
 		# in the test results.
 		result=$(stdbuf -oL $TIMEOUT "$RTLA" $2 2>&1); exitcode=$?
@@ -37,6 +69,14 @@ unset_timeout() {
 	unset TIMEOUT
 }
 
+set_no_reset_osnoise() {
+	NO_RESET_OSNOISE=1
+}
+
+unset_no_reset_osnoise() {
+	unset NO_RESET_OSNOISE
+}
+
 test_end() {
 	# If running without TEST_COUNT, tests are not actually run, just
 	# counted. In that case, re-run the test with the correct count.
-- 
2.47.2

[for-next][PATCH 8/9] rtla/tests: Test setting default options

[Steven Rostedt]

From: Tomas Glozar <tglozar@redhat.com>

Add function to test engine to test with pre-set osnoise options, and
use it to test whether osnoise period (as an example) is set correctly.

The test works by pre-setting a high period of 10 minutes and stop on
threshold. Thus, it is easy to check whether rtla is properly resetting
the period to default: if it is, the test will complete on time, since
the first sample will overflow the threshold. If not, it will time out.

Cc: Luis Goncalves <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-7-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/tests/engine.sh | 26 ++++++++++++++++++++++++++
 tools/tracing/rtla/tests/osnoise.t |  6 ++++++
 2 files changed, 32 insertions(+)

diff --git a/tools/tracing/rtla/tests/engine.sh b/tools/tracing/rtla/tests/engine.sh
index 5db8aa4bc031..b1697b3e3f52 100644
--- a/tools/tracing/rtla/tests/engine.sh
+++ b/tools/tracing/rtla/tests/engine.sh
@@ -61,6 +61,32 @@ check() {
 	fi
 }
 
+check_with_osnoise_options() {
+	# Do the same as "check", but with pre-set osnoise options.
+	# Note: rtla should reset the osnoise options, this is used to test
+	# if it indeed does so.
+	# Save original arguments
+	arg1=$1
+	arg2=$2
+
+	# Apply osnoise options (if not dry run)
+	if [ -n "$TEST_COUNT" ]
+	then
+		[ "$NO_RESET_OSNOISE" == 1 ] || reset_osnoise
+		shift
+		while shift
+		do
+			[ "$1" == "" ] && continue
+			option=$(echo $1 | cut -d '=' -f 1)
+			value=$(echo $1 | cut -d '=' -f 2)
+			echo "option: $option, value: $value"
+			echo "$value" > "/sys/kernel/tracing/osnoise/$option" || return 1
+		done
+	fi
+
+	NO_RESET_OSNOISE=1 check "$arg1" "$arg2"
+}
+
 set_timeout() {
 	TIMEOUT="timeout -v -k 15s $1"
 }
diff --git a/tools/tracing/rtla/tests/osnoise.t b/tools/tracing/rtla/tests/osnoise.t
index 86596e547893..e5995c03c790 100644
--- a/tools/tracing/rtla/tests/osnoise.t
+++ b/tools/tracing/rtla/tests/osnoise.t
@@ -16,4 +16,10 @@ check "verify the  --trace param" \
 check "verify the --entries/-E param" \
 	"osnoise hist -P F:1 -c 0 -r 900000 -d 1M -b 10 -E 25"
 
+# Test setting default period by putting an absurdly high period
+# and stopping on threshold.
+# If default period is not set, this will time out.
+check_with_osnoise_options "apply default period" \
+	"osnoise hist -s 1" period_us=600000000
+
 test_end
-- 
2.47.2

[for-next][PATCH 9/9] rtla: Add the ability to create ctags and etags

[Steven Rostedt]

From: John Kacur <jkacur@redhat.com>

- Add the ability to create and remove ctags and etags, using the following
make tags
make TAGS
make tags_clean

- fix a comment in Makefile.rtla with the correct spelling and don't
  imply that the ability to create an rtla tarball will be removed

Cc: Tomas Glozar <tglozar@redhat.com>
Cc: "Luis Claudio R . Goncalves" <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250321175053.29048-1-jkacur@redhat.com
Signed-off-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 tools/tracing/rtla/Makefile.rtla | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/tools/tracing/rtla/Makefile.rtla b/tools/tracing/rtla/Makefile.rtla
index cc1d6b615475..08c1b40883d3 100644
--- a/tools/tracing/rtla/Makefile.rtla
+++ b/tools/tracing/rtla/Makefile.rtla
@@ -34,6 +34,8 @@ INSTALL		:= install
 MKDIR		:= mkdir
 STRIP		:= strip
 BINDIR		:= /usr/bin
+CTAGS		:= ctags
+ETAGS		:= ctags -e
 
 .PHONY: install
 install: doc_install
@@ -47,6 +49,18 @@ install: doc_install
 	@test ! -f $(DESTDIR)$(BINDIR)/timerlat || $(RM) $(DESTDIR)$(BINDIR)/timerlat
 	@$(LN) -s rtla $(DESTDIR)$(BINDIR)/timerlat
 
+.PHONY: tags
+tags:
+	$(CTAGS) -R --extras=+f --c-kinds=+p src
+
+.PHONY: TAGS
+TAGS:
+	$(ETAGS) -R --extras=+f --c-kinds=+p src
+
+.PHONY: tags_clean
+tags_clean:
+	$(RM) tags TAGS
+
 .PHONY: doc doc_clean doc_install
 doc:
 	$(MAKE) -C $(DOCSRC)
@@ -57,8 +71,7 @@ doc_clean:
 doc_install:
 	$(MAKE) -C $(DOCSRC) install
 
-# This section is neesary for the tarball, when the tarball
-# support is removed, we can delete these entries.
+# This section is necessary to make the rtla tarball
 NAME		:= rtla
 DIRS		:= src
 FILES		:= Makefile README.txt
-- 
2.47.2