linux-kernel - [PATCH] tools/rtla: Replace setting prio with nice for SCHED

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Date: Wed,  7 Feb 2024 14:51:42 +0800
From: limingming3 <limingming890315@...il.com>
To: bristot@...nel.org,
	rostedt@...dmis.org,
	colin.i.king@...il.com,
	corbet@....net
Cc: juri.lelli@...hat.com,
	williams@...hat.com,
	bagasdotme@...il.com,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	limingming3@...iang.com
Subject: [PATCH] tools/rtla: Replace setting prio with nice for SCHED_OTHER

Since the sched_priority for SCHED_OTHER is always 0, it makes no
sence to set it.
Setting nice for SCHED_OTHER seems more meaningful.

Signed-off-by: limingming3 <limingming3@...iang.com>
---
 tools/tracing/rtla/src/utils.c | 6 +++---
 tools/tracing/rtla/src/utils.h | 2 ++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/tracing/rtla/src/utils.c b/tools/tracing/rtla/src/utils.c
index c769d7b3842c..159de175ebcc 100644
--- a/tools/tracing/rtla/src/utils.c
+++ b/tools/tracing/rtla/src/utils.c
@@ -479,13 +479,13 @@ int parse_prio(char *arg, struct sched_attr *sched_param)
 		if (prio == INVALID_VAL)
 			return -1;
 
-		if (prio < sched_get_priority_min(SCHED_OTHER))
+		if (prio < MIN_NICE)
 			return -1;
-		if (prio > sched_get_priority_max(SCHED_OTHER))
+		if (prio > MAX_NICE)
 			return -1;
 
 		sched_param->sched_policy   = SCHED_OTHER;
-		sched_param->sched_priority = prio;
+		sched_param->sched_nice = prio;
 		break;
 	default:
 		return -1;
diff --git a/tools/tracing/rtla/src/utils.h b/tools/tracing/rtla/src/utils.h
index 04ed1e650495..d44513e6c66a 100644
--- a/tools/tracing/rtla/src/utils.h
+++ b/tools/tracing/rtla/src/utils.h
@@ -9,6 +9,8 @@
  */
 #define BUFF_U64_STR_SIZE	24
 #define MAX_PATH		1024
+#define MAX_NICE		20
+#define MIN_NICE		-19
 
 #define container_of(ptr, type, member)({			\
 	const typeof(((type *)0)->member) *__mptr = (ptr);	\
-- 
2.25.1