Created
May 1, 2023 08:46
-
-
Save haller33/c0e3dd2732050098886cf2fb1da540a6 to your computer and use it in GitHub Desktop.
A change on Schedduler of Kernel for better performance
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| diff --git a/kernel/sched/core.c b/kernel/sched/core.c | |
| index daff72f00..857577ea1 100644 | |
| --- a/kernel/sched/core.c | |
| +++ b/kernel/sched/core.c | |
| @@ -4572,7 +4572,16 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) | |
| /* | |
| * Make sure we do not leak PI boosting priority to the child. | |
| */ | |
| - p->prio = current->normal_prio; | |
| + /// Kernel Config from OS Running get config of existing linux running | |
| + // # cp /boot/config-`uname -r` .config | |
| + | |
| + // p->prio = current->normal_prio; | |
| + /* Lorenzo Nava: force policy to RR */ | |
| + if (p->policy == SCHED_NORMAL) { | |
| + p->prio = current->normal_prio - NICE_WIDTH - | |
| + PRIO_TO_NICE(current->static_prio); | |
| + p->normal_prio = p->prio; | |
| + p->rt_priority = p->prio; | |
| + p->policy = SCHED_RR; | |
| + p->static_prio = NICE_TO_PRIO(0); | |
| + } | |
| uclamp_fork(p); | |
| @@ -4607,6 +4616,8 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) | |
| init_entity_runnable_average(&p->se); | |
| + | |
| + | |
| #ifdef CONFIG_SCHED_INFO | |
| if (likely(sched_info_on())) | |
| memset(&p->sched_info, 0, sizeof(p->sched_info)); | |
| @@ -7669,6 +7680,24 @@ static int _sched_setscheduler(struct task_struct *p, int policy, | |
| attr.sched_policy = policy; | |
| } | |
| + /* Lorenzo Nava: force policy to RR */ | |
| + if (p->policy == SCHED_NORMAL) { | |
| + p->prio = current->normal_prio - NICE_WIDTH - | |
| + PRIO_TO_NICE(current->static_prio); | |
| + p->normal_prio = p->prio; | |
| + p->rt_priority = p->prio; | |
| + p->policy = SCHED_RR; | |
| + p->static_prio = NICE_TO_PRIO(0); | |
| + } | |
| + | |
| + /* Lorenzo Nava: force policy of process to RR */ | |
| + if (attr.sched_policy == SCHED_NORMAL) { | |
| + attr.sched_priority = param->sched_priority - | |
| + NICE_WIDTH - attr.sched_nice; | |
| + attr.sched_policy = SCHED_RR; | |
| + } | |
| + | |
| + | |
| return __sched_setscheduler(p, &attr, check, true); | |
| } | |
| /** |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment