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.

Link: https://lkml.kernel.org/r/20240207065142.1753909-1-limingming3@lixiang.com
Cc: stable@vger.kernel.org
Fixes: b1696371d865 ("rtla: Helper functions for rtla")
Signed-off-by: limingming3 <limingming3@lixiang.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>

diff --git a/tools/tracing/rtla/src/utils.c b/tools/tracing/rtla/src/utils.c
index 5fcd6495ff058fcfdca5d3af75dc23aae1453ee4..9ac71a66840c1bec2e944f3a9db0f427f3c7edfb 100644 (file)
--- a/tools/tracing/rtla/src/utils.c
+++ b/tools/tracing/rtla/src/utils.c
@@ -473,13 +473,13 @@ 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 04ed1e650495a357daabfe40653c1eab5e89b005..d44513e6c66a01a5fc75f472dcfb9ebbfbd57bfb 100644 (file)
--- 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);      \