tools/rtla: Remove unneeded nr_cpus arguments

nr_cpus does not change at runtime, so passing it through function
arguments is unnecessary.

Use the global nr_cpus instead of propagating it via parameters.

Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Link: https://lore.kernel.org/r/20260306194953.2511960-3-costa.shul@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>

7 files changed, 34 insertions, 51 deletions

diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index 00b8c95cbf85..f39f60d3b00e 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -62,7 +62,7 @@ static void osnoise_free_hist_tool(struct osnoise_tool *tool)
  * osnoise_alloc_histogram - alloc runtime data
  */
 static struct osnoise_hist_data
-*osnoise_alloc_histogram(int nr_cpus, int entries, int bucket_size)
+*osnoise_alloc_histogram(int entries, int bucket_size)
 {
 	struct osnoise_hist_data *data;
 	int cpu;
@@ -651,7 +651,7 @@ static struct osnoise_tool
 	if (!tool)
 		return NULL;
 
-	tool->data = osnoise_alloc_histogram(nr_cpus, params->hist.entries,
+	tool->data = osnoise_alloc_histogram(params->hist.entries,
 					     params->hist.bucket_size);
 	if (!tool->data)
 		goto out_err;
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index 9a6cd9a2470a..3a241b69f622 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -51,7 +51,7 @@ static void osnoise_free_top_tool(struct osnoise_tool *tool)
 /*
  * osnoise_alloc_histogram - alloc runtime data
  */
-static struct osnoise_top_data *osnoise_alloc_top(int nr_cpus)
+static struct osnoise_top_data *osnoise_alloc_top(void)
 {
 	struct osnoise_top_data *data;
 
@@ -495,7 +495,7 @@ struct osnoise_tool *osnoise_init_top(struct common_params *params)
 	if (!tool)
 		return NULL;
 
-	tool->data = osnoise_alloc_top(nr_cpus);
+	tool->data = osnoise_alloc_top();
 	if (!tool->data) {
 		osnoise_destroy_tool(tool);
 		return NULL;
diff --git a/tools/tracing/rtla/src/timerlat_bpf.c b/tools/tracing/rtla/src/timerlat_bpf.c
index 05adf18303df..dd3cf71d74e5 100644
--- a/tools/tracing/rtla/src/timerlat_bpf.c
+++ b/tools/tracing/rtla/src/timerlat_bpf.c
@@ -147,24 +147,23 @@ static int get_value(struct bpf_map *map_irq,
 		     int key,
 		     long long *value_irq,
 		     long long *value_thread,
-		     long long *value_user,
-		     int cpus)
+		     long long *value_user)
 {
 	int err;
 
 	err = bpf_map__lookup_elem(map_irq, &key,
 				   sizeof(unsigned int), value_irq,
-				   sizeof(long long) * cpus, 0);
+				   sizeof(long long) * nr_cpus, 0);
 	if (err)
 		return err;
 	err = bpf_map__lookup_elem(map_thread, &key,
 				   sizeof(unsigned int), value_thread,
-				   sizeof(long long) * cpus, 0);
+				   sizeof(long long) * nr_cpus, 0);
 	if (err)
 		return err;
 	err = bpf_map__lookup_elem(map_user, &key,
 				   sizeof(unsigned int), value_user,
-				   sizeof(long long) * cpus, 0);
+				   sizeof(long long) * nr_cpus, 0);
 	if (err)
 		return err;
 	return 0;
@@ -176,13 +175,12 @@ static int get_value(struct bpf_map *map_irq,
 int timerlat_bpf_get_hist_value(int key,
 				long long *value_irq,
 				long long *value_thread,
-				long long *value_user,
-				int cpus)
+				long long *value_user)
 {
 	return get_value(bpf->maps.hist_irq,
 			 bpf->maps.hist_thread,
 			 bpf->maps.hist_user,
-			 key, value_irq, value_thread, value_user, cpus);
+			 key, value_irq, value_thread, value_user);
 }
 
 /*
@@ -191,13 +189,12 @@ int timerlat_bpf_get_hist_value(int key,
 int timerlat_bpf_get_summary_value(enum summary_field key,
 				   long long *value_irq,
 				   long long *value_thread,
-				   long long *value_user,
-				   int cpus)
+				   long long *value_user)
 {
 	return get_value(bpf->maps.summary_irq,
 			 bpf->maps.summary_thread,
 			 bpf->maps.summary_user,
-			 key, value_irq, value_thread, value_user, cpus);
+			 key, value_irq, value_thread, value_user);
 }
 
 /*
diff --git a/tools/tracing/rtla/src/timerlat_bpf.h b/tools/tracing/rtla/src/timerlat_bpf.h
index 169abeaf4363..531c9ef16f51 100644
--- a/tools/tracing/rtla/src/timerlat_bpf.h
+++ b/tools/tracing/rtla/src/timerlat_bpf.h
@@ -23,13 +23,11 @@ int timerlat_bpf_restart_tracing(void);
 int timerlat_bpf_get_hist_value(int key,
 				long long *value_irq,
 				long long *value_thread,
-				long long *value_user,
-				int cpus);
+				long long *value_user);
 int timerlat_bpf_get_summary_value(enum summary_field key,
 				   long long *value_irq,
 				   long long *value_thread,
-				   long long *value_user,
-				   int cpus);
+				   long long *value_user);
 int timerlat_load_bpf_action_program(const char *program_path);
 static inline int have_libbpf_support(void) { return 1; }
 #else
@@ -45,16 +43,14 @@ static inline int timerlat_bpf_restart_tracing(void) { return -1; };
 static inline int timerlat_bpf_get_hist_value(int key,
 					      long long *value_irq,
 					      long long *value_thread,
-					      long long *value_user,
-					      int cpus)
+					      long long *value_user)
 {
 	return -1;
 }
 static inline int timerlat_bpf_get_summary_value(enum summary_field key,
 						 long long *value_irq,
 						 long long *value_thread,
-						 long long *value_user,
-						 int cpus)
+						 long long *value_user)
 {
 	return -1;
 }
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c
index 3ebe41eed9f6..7e735b62488c 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -83,7 +83,7 @@ static void timerlat_free_histogram_tool(struct osnoise_tool *tool)
  * timerlat_alloc_histogram - alloc runtime data
  */
 static struct timerlat_hist_data
-*timerlat_alloc_histogram(int nr_cpus, int entries, int bucket_size)
+*timerlat_alloc_histogram(int entries, int bucket_size)
 {
 	struct timerlat_hist_data *data;
 	int cpu;
@@ -211,7 +211,7 @@ static int timerlat_hist_bpf_pull_data(struct osnoise_tool *tool)
 	/* Pull histogram */
 	for (i = 0; i < data->entries; i++) {
 		err = timerlat_bpf_get_hist_value(i, value_irq, value_thread,
-						  value_user, data->nr_cpus);
+						  value_user);
 		if (err)
 			return err;
 		for (j = 0; j < data->nr_cpus; j++) {
@@ -223,8 +223,7 @@ static int timerlat_hist_bpf_pull_data(struct osnoise_tool *tool)
 
 	/* Pull summary */
 	err = timerlat_bpf_get_summary_value(SUMMARY_COUNT,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -234,8 +233,7 @@ static int timerlat_hist_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_MIN,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -245,8 +243,7 @@ static int timerlat_hist_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_MAX,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -256,8 +253,7 @@ static int timerlat_hist_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_SUM,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -267,8 +263,7 @@ static int timerlat_hist_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_OVERFLOW,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -1045,7 +1040,7 @@ static struct osnoise_tool
 	if (!tool)
 		return NULL;
 
-	tool->data = timerlat_alloc_histogram(nr_cpus, params->hist.entries,
+	tool->data = timerlat_alloc_histogram(params->hist.entries,
 					      params->hist.bucket_size);
 	if (!tool->data)
 		goto out_err;
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index 4105638f45c4..994e89a57cd3 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -62,7 +62,7 @@ static void timerlat_free_top_tool(struct osnoise_tool *tool)
 /*
  * timerlat_alloc_histogram - alloc runtime data
  */
-static struct timerlat_top_data *timerlat_alloc_top(int nr_cpus)
+static struct timerlat_top_data *timerlat_alloc_top(void)
 {
 	struct timerlat_top_data *data;
 	int cpu;
@@ -196,8 +196,7 @@ static int timerlat_top_bpf_pull_data(struct osnoise_tool *tool)
 
 	/* Pull summary */
 	err = timerlat_bpf_get_summary_value(SUMMARY_CURRENT,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -207,8 +206,7 @@ static int timerlat_top_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_COUNT,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -218,8 +216,7 @@ static int timerlat_top_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_MIN,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -229,8 +226,7 @@ static int timerlat_top_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_MAX,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -240,8 +236,7 @@ static int timerlat_top_bpf_pull_data(struct osnoise_tool *tool)
 	}
 
 	err = timerlat_bpf_get_summary_value(SUMMARY_SUM,
-					     value_irq, value_thread, value_user,
-					     data->nr_cpus);
+					     value_irq, value_thread, value_user);
 	if (err)
 		return err;
 	for (i = 0; i < data->nr_cpus; i++) {
@@ -791,7 +786,7 @@ static struct osnoise_tool
 	if (!top)
 		return NULL;
 
-	top->data = timerlat_alloc_top(nr_cpus);
+	top->data = timerlat_alloc_top();
 	if (!top->data)
 		goto out_err;
 
diff --git a/tools/tracing/rtla/src/timerlat_u.c b/tools/tracing/rtla/src/timerlat_u.c
index a569fe7f93aa..03b4e68e8b1e 100644
--- a/tools/tracing/rtla/src/timerlat_u.c
+++ b/tools/tracing/rtla/src/timerlat_u.c
@@ -99,7 +99,7 @@ static int timerlat_u_main(int cpu, struct timerlat_u_params *params)
  *
  * Return the number of processes that received the kill.
  */
-static int timerlat_u_send_kill(pid_t *procs, int nr_cpus)
+static int timerlat_u_send_kill(pid_t *procs)
 {
 	int killed = 0;
 	int i, retval;
@@ -169,7 +169,7 @@ void *timerlat_u_dispatcher(void *data)
 
 		/* parent */
 		if (pid == -1) {
-			timerlat_u_send_kill(procs, nr_cpus);
+			timerlat_u_send_kill(procs);
 			debug_msg("Failed to create child processes");
 			pthread_exit(&retval);
 		}
@@ -196,7 +196,7 @@ void *timerlat_u_dispatcher(void *data)
 		sleep(1);
 	}
 
-	timerlat_u_send_kill(procs, nr_cpus);
+	timerlat_u_send_kill(procs);
 
 	while (procs_count) {
 		pid = waitpid(-1, &wstatus, 0);