2024-02-07 06:52:00

by limingming3

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 <[email protected]>
---
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

2024-02-08 13:22:47

by Daniel Bristot de Oliveira

Subject: Re: [PATCH] tools/rtla: Replace setting prio with nice for SCHED_OTHER

On 2/7/24 07:51, limingming3 wrote:
> 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.

Thanks!

This is actually a fix, I meant to set nice since the beginning.

-- Daniel