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omarchy-pkgs/pkgbuilds/linux-omarchy-bore/0110-bore-6.8.0.patch
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diff --git a/include/linux/sched.h b/include/linux/sched.h
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -823,6 +823,31 @@ struct kmap_ctrl {
#endif
};
+#ifdef CONFIG_SCHED_BORE
+#define BORE_BC_TIMESTAMP_SHIFT 16
+
+struct bore_bc {
+ union {
+ struct {
+ u64 timestamp: 48;
+ u64 penalty: 16;
+ };
+ u64 value;
+ };
+};
+
+struct bore_ctx {
+ u64 burst_time;
+ u16 prev_penalty;
+ u16 curr_penalty;
+ u16 penalty;
+ bool stop_update;
+ bool futex_waiting;
+ struct bore_bc subtree;
+ struct bore_bc group;
+};
+#endif /* CONFIG_SCHED_BORE */
+
struct task_struct {
#ifdef CONFIG_THREAD_INFO_IN_TASK
/*
@@ -884,6 +909,9 @@ struct task_struct {
#ifdef CONFIG_SCHED_CLASS_EXT
struct sched_ext_entity scx;
#endif
+#ifdef CONFIG_SCHED_BORE
+ struct bore_ctx bore;
+#endif /* CONFIG_SCHED_BORE */
const struct sched_class *sched_class;
#ifdef CONFIG_SCHED_CORE
diff --git a/include/linux/sched/bore.h b/include/linux/sched/bore.h
new file mode 100644
--- /dev/null
+++ b/include/linux/sched/bore.h
@@ -0,0 +1,49 @@
+#ifndef _KERNEL_SCHED_BORE_H
+#define _KERNEL_SCHED_BORE_H
+
+#include <linux/sched.h>
+#include <linux/sched/cputime.h>
+#include <linux/atomic.h>
+#include <linux/list.h>
+#include <linux/rcupdate.h>
+#include <linux/jump_label.h>
+
+#define SCHED_BORE_AUTHOR "Masahito Suzuki"
+#define SCHED_BORE_PROGNAME "BORE CPU Scheduler modification"
+
+#define SCHED_BORE_VERSION "6.8.0"
+
+extern u8 __read_mostly sched_bore;
+DECLARE_STATIC_KEY_TRUE(sched_bore_key);
+extern u8 __read_mostly sched_burst_inherit_type;
+extern u8 __read_mostly sched_burst_smoothness;
+extern u8 __read_mostly sched_burst_penalty_offset;
+extern uint __read_mostly sched_burst_penalty_scale;
+extern uint __read_mostly sched_burst_cache_lifetime;
+extern u8 __read_mostly sched_burst_protect_slice_lv;
+DECLARE_STATIC_KEY_TRUE(sched_burst_protect_slice_cond_key);
+DECLARE_STATIC_KEY_FALSE(sched_burst_protect_slice_prefer_key);
+
+static inline u8 bore_score(struct task_struct *p)
+{ return p->bore.penalty >> 8; }
+
+extern u8 effective_prio_bore(struct task_struct *p);
+extern void update_curr_bore(struct task_struct *p, u64 delta_exec);
+extern void restart_burst_bore(struct task_struct *p);
+extern void restart_burst_rescale_deadline_bore(struct task_struct *p);
+extern void task_fork_bore(struct task_struct *p, struct task_struct *parent,
+ u64 clone_flags, u64 now);
+extern void sched_init_bore(void);
+extern void reset_task_bore(struct task_struct *p);
+
+extern int sched_bore_update_handler(const struct ctl_table *table,
+ int write, void __user *buffer, size_t *lenp, loff_t *ppos);
+extern int sched_burst_inherit_type_update_handler(const struct ctl_table *table,
+ int write, void __user *buffer, size_t *lenp, loff_t *ppos);
+extern int sched_burst_protect_slice_lv_update_handler(const struct ctl_table *table,
+ int write, void __user *buffer, size_t *lenp, loff_t *ppos);
+
+extern void reweight_entity(
+ struct cfs_rq *cfs_rq, struct sched_entity *se, unsigned long weight);
+
+#endif /* _KERNEL_SCHED_BORE_H */
diff --git a/init/Kconfig b/init/Kconfig
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1480,6 +1480,23 @@ config CHECKPOINT_RESTORE
If unsure, say N here.
+config SCHED_BORE
+ bool "Burst-Oriented Response Enhancer"
+ default y
+ help
+ In Desktop and Mobile computing, one might prefer interactive
+ tasks to keep responsive no matter what they run in the background.
+
+ Enabling this kernel feature modifies the scheduler to discriminate
+ tasks by their burst time (runtime since it last went sleeping or
+ yielding state) and prioritize those that run less bursty.
+ Such tasks usually include window compositor, widgets backend,
+ terminal emulator, video playback, games and so on.
+ With a little impact to scheduling fairness, it may improve
+ responsiveness especially under heavy background workload.
+
+ If unsure, say Y here.
+
config SCHED_AUTOGROUP
bool "Automatic process group scheduling"
select CGROUPS
diff --git a/kernel/Kconfig.hz b/kernel/Kconfig.hz
--- a/kernel/Kconfig.hz
+++ b/kernel/Kconfig.hz
@@ -57,3 +57,20 @@ config HZ
config SCHED_HRTICK
def_bool HIGH_RES_TIMERS
+
+config MIN_BASE_SLICE_NS
+ int "Default value for min_base_slice_ns"
+ default 2000000
+ help
+ The BORE Scheduler automatically calculates the optimal base
+ slice for the configured HZ using the following equation:
+
+ base_slice_ns =
+ 1000000000/HZ * DIV_ROUNDUP(min_base_slice_ns, 1000000000/HZ)
+
+ This option sets the default lower bound limit of the base slice
+ to prevent the loss of task throughput due to overscheduling.
+
+ Setting this value too high can cause the system to boot with
+ an unnecessarily large base slice, resulting in high scheduling
+ latency and poor system responsiveness.
diff --git a/kernel/exit.c b/kernel/exit.c
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -147,7 +147,11 @@ static void __unhash_process(struct release_task_post *post, struct task_struct
detach_pid(post->pids, p, PIDTYPE_SID);
list_del_rcu(&p->tasks);
+#ifdef CONFIG_SCHED_BORE
+ list_del_rcu(&p->sibling);
+#else /* !CONFIG_SCHED_BORE */
list_del_init(&p->sibling);
+#endif /* CONFIG_SCHED_BORE */
__this_cpu_dec(process_counts);
}
list_del_rcu(&p->thread_node);
diff --git a/kernel/fork.c b/kernel/fork.c
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -120,6 +120,10 @@
/* For dup_mmap(). */
#include "../mm/internal.h"
+#ifdef CONFIG_SCHED_BORE
+#include <linux/sched/bore.h>
+#endif /* CONFIG_SCHED_BORE */
+
#include <trace/events/sched.h>
#define CREATE_TRACE_POINTS
@@ -2443,6 +2447,11 @@ __latent_entropy struct task_struct *copy_process(
p->start_time = ktime_get_ns();
p->start_boottime = ktime_get_boottime_ns();
+#ifdef CONFIG_SCHED_BORE
+ if (likely(p->pid))
+ task_fork_bore(p, current, clone_flags, p->start_time);
+#endif /* CONFIG_SCHED_BORE */
+
/*
* Make it visible to the rest of the system, but dont wake it up yet.
* Need tasklist lock for parent etc handling!
@@ -2528,7 +2537,11 @@ __latent_entropy struct task_struct *copy_process(
p->real_parent->signal->is_child_subreaper;
if (clone_flags & CLONE_AUTOREAP)
p->signal->autoreap = 1;
+#ifdef CONFIG_SCHED_BORE
+ list_add_tail_rcu(&p->sibling, &p->real_parent->children);
+#else /* !CONFIG_SCHED_BORE */
list_add_tail(&p->sibling, &p->real_parent->children);
+#endif /* CONFIG_SCHED_BORE */
list_add_tail_rcu(&p->tasks, &init_task.tasks);
attach_pid(p, PIDTYPE_TGID);
attach_pid(p, PIDTYPE_PGID);
diff --git a/kernel/futex/waitwake.c b/kernel/futex/waitwake.c
--- a/kernel/futex/waitwake.c
+++ b/kernel/futex/waitwake.c
@@ -4,6 +4,9 @@
#include <linux/sched/task.h>
#include <linux/sched/signal.h>
#include <linux/freezer.h>
+#ifdef CONFIG_SCHED_BORE
+#include <linux/sched/bore.h>
+#endif /* CONFIG_SCHED_BORE */
#include "futex.h"
@@ -384,7 +387,15 @@ void futex_do_wait(struct futex_q *q, struct hrtimer_sleeper *timeout)
* is no timeout, or if it has yet to expire.
*/
if (!timeout || timeout->task)
+#ifdef CONFIG_SCHED_BORE
+ {
+ current->bore.futex_waiting = true;
+#endif /* CONFIG_SCHED_BORE */
schedule();
+#ifdef CONFIG_SCHED_BORE
+ current->bore.futex_waiting = false;
+ }
+#endif /* CONFIG_SCHED_BORE */
}
__set_current_state(TASK_RUNNING);
}
diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile
--- a/kernel/sched/Makefile
+++ b/kernel/sched/Makefile
@@ -40,3 +40,4 @@ obj-y += core.o
obj-y += fair.o
obj-y += build_policy.o
obj-y += build_utility.o
+obj-$(CONFIG_SCHED_BORE) += bore.o
diff --git a/kernel/sched/bore.c b/kernel/sched/bore.c
new file mode 100644
--- /dev/null
+++ b/kernel/sched/bore.c
@@ -0,0 +1,466 @@
+/*
+ * Burst-Oriented Response Enhancer (BORE) CPU Scheduler
+ * Copyright (C) 2021-2025 Masahito Suzuki <firelzrd@gmail.com>
+ */
+#include <linux/cpuset.h>
+#include <linux/sched/task.h>
+#include <linux/sched/bore.h>
+#include "sched.h"
+
+#ifdef CONFIG_SCHED_BORE
+DEFINE_STATIC_KEY_TRUE(sched_bore_key);
+u8 __read_mostly sched_bore = 1;
+u8 __read_mostly sched_burst_inherit_type = 2;
+u8 __read_mostly sched_burst_protect_slice_lv = 1;
+u8 __read_mostly sched_burst_smoothness = 1;
+u8 __read_mostly sched_burst_penalty_offset = 24;
+uint __read_mostly sched_burst_penalty_scale = 1536;
+uint __read_mostly sched_burst_cache_lifetime = 75000000;
+static int __maybe_unused maxval_prio = 39;
+static int __maybe_unused maxval_6_bits = 63;
+static int __maybe_unused maxval_8_bits = 255;
+static int __maybe_unused maxval_12_bits = 4095;
+
+#define MAX_BURST_PENALTY ((40U << 8) - 1)
+#define BURST_CACHE_SAMPLE_LIMIT 63
+#define BURST_CACHE_SCAN_LIMIT (BURST_CACHE_SAMPLE_LIMIT * 2)
+
+static u32 bore_reciprocal_lut[BURST_CACHE_SAMPLE_LIMIT + 1];
+
+DEFINE_STATIC_KEY_TRUE(sched_burst_inherit_key);
+DEFINE_STATIC_KEY_TRUE(sched_burst_ancestor_key);
+DEFINE_STATIC_KEY_TRUE (sched_burst_protect_slice_cond_key);
+DEFINE_STATIC_KEY_FALSE(sched_burst_protect_slice_prefer_key);
+
+static inline u32 log2p1_u64_u32fp(u64 v, u8 fp) {
+ if (unlikely(!v)) return 0;
+ int clz = __builtin_clzll(v);
+ int exponent = 64 - clz;
+ u32 mantissa = (u32)((v << clz) << 1 >> (64 - fp));
+ return exponent << fp | mantissa;
+}
+
+static inline u32 calc_burst_penalty(u64 burst_time) {
+ u32 greed = log2p1_u64_u32fp(burst_time, 8),
+ tolerance = sched_burst_penalty_offset << 8;
+ s32 diff = (s32)(greed - tolerance);
+ u32 penalty = diff & ~(diff >> 31);
+ u32 scaled_penalty = penalty * sched_burst_penalty_scale >> 10;
+ s32 overflow = scaled_penalty - MAX_BURST_PENALTY;
+ return scaled_penalty - (overflow & ~(overflow >> 31));
+}
+
+static inline u64 rescale_slice(u64 delta, u8 old_prio, u8 new_prio) {
+ u64 unscaled, rescaled;
+ unscaled = mul_u64_u32_shr(delta , sched_prio_to_weight[old_prio], 10);
+ rescaled = mul_u64_u32_shr(unscaled, sched_prio_to_wmult [new_prio], 22);
+ return rescaled;
+}
+
+static inline u32 binary_smooth(u32 new, u32 old) {
+ u32 is_growing = (new > old);
+ u32 increment = (new - old) * is_growing;
+ u32 shift = sched_burst_smoothness;
+ u32 smoothed = old + ((increment + (1U << shift) - 1) >> shift);
+ return (new & ~(-is_growing)) | (smoothed & (-is_growing));
+}
+
+static void reweight_task_by_prio(struct task_struct *p, int prio) {
+ if (task_has_idle_policy(p)) return;
+
+ struct sched_entity *se = &p->se;
+ unsigned long weight = scale_load(sched_prio_to_weight[prio]);
+
+ if (se->on_rq) {
+ p->bore.stop_update = true;
+ reweight_entity(cfs_rq_of(se), se, weight);
+ p->bore.stop_update = false;
+ } else
+ se->load.weight = weight;
+ se->load.inv_weight = sched_prio_to_wmult[prio];
+}
+
+u8 effective_prio_bore(struct task_struct *p) {
+ int prio = p->static_prio - MAX_RT_PRIO;
+ if (static_branch_likely(&sched_bore_key))
+ prio += bore_score(p);
+ prio &= ~(prio >> 31);
+ s32 diff = prio - maxval_prio;
+ prio -= (diff & ~(diff >> 31));
+ return (u8)prio;
+}
+
+static void update_penalty(struct task_struct *p) {
+ struct bore_ctx *ctx = &p->bore;
+
+ u8 prev_prio = effective_prio_bore(p);
+
+ s32 diff = (s32)ctx->curr_penalty - (s32)ctx->prev_penalty;
+ u16 max_val = ctx->curr_penalty - (diff & (diff >> 31));
+ u32 is_kthread = !!(p->flags & PF_KTHREAD);
+ ctx->penalty = max_val & -(s32)(!is_kthread);
+
+ u8 new_prio = effective_prio_bore(p);
+ if (new_prio != prev_prio)
+ reweight_task_by_prio(p, new_prio);
+}
+
+void update_curr_bore(struct task_struct *p, u64 delta_exec) {
+ struct bore_ctx *ctx = &p->bore;
+ if (ctx->stop_update) return;
+
+ ctx->burst_time += delta_exec;
+ u32 curr_penalty = ctx->curr_penalty = calc_burst_penalty(ctx->burst_time);
+
+ if (curr_penalty <= ctx->prev_penalty) return;
+ update_penalty(p);
+}
+
+void restart_burst_bore(struct task_struct *p) {
+ struct bore_ctx *ctx = &p->bore;
+ u32 new_penalty = binary_smooth(ctx->curr_penalty, ctx->prev_penalty);
+ ctx->prev_penalty = new_penalty;
+ ctx->curr_penalty = 0;
+ ctx->burst_time = 0;
+ update_penalty(p);
+}
+
+void restart_burst_rescale_deadline_bore(struct task_struct *p) {
+ struct sched_entity *se = &p->se;
+ s64 vscaled, vremain = se->deadline - se->vruntime;
+
+ u8 old_prio = effective_prio_bore(p);
+ restart_burst_bore(p);
+ u8 new_prio = effective_prio_bore(p);
+
+ if (old_prio > new_prio) {
+ vscaled = rescale_slice(abs(vremain), old_prio, new_prio);
+ if (unlikely(vremain < 0))
+ vscaled = -vscaled;
+ se->deadline = se->vruntime + vscaled;
+ }
+}
+
+static inline bool task_is_bore_eligible(struct task_struct *p)
+{return p && p->sched_class == &fair_sched_class && !p->exit_state;}
+
+#ifndef for_each_child_task
+#define for_each_child_task(p, t) \
+ list_for_each_entry_rcu(t, &(p)->children, sibling)
+#endif
+
+static inline u32 count_children_upto2(struct task_struct *p) {
+ struct list_head *head = &p->children;
+ struct list_head *first = READ_ONCE(head->next);
+ struct list_head *second = READ_ONCE(first->next);
+ return (first != head) + (second != head);
+}
+
+static inline bool burst_cache_expired(struct bore_bc *bc, u64 now) {
+ struct bore_bc bc_val = { .value = READ_ONCE(bc->value) };
+ u64 timestamp = (u64)bc_val.timestamp << BORE_BC_TIMESTAMP_SHIFT;
+ return now - timestamp > (u64)sched_burst_cache_lifetime;
+}
+
+static void update_burst_cache(struct bore_bc *bc,
+ struct task_struct *p, u32 count, u32 total, u64 now) {
+ u32 average = (count == 1) ? total :
+ (u32)(((u64)total * bore_reciprocal_lut[count]) >> 32);
+
+ struct bore_bc new_bc = {
+ .penalty = max(average, p->bore.penalty),
+ .timestamp = now >> BORE_BC_TIMESTAMP_SHIFT
+ };
+ WRITE_ONCE(bc->value, new_bc.value);
+}
+
+static u32 inherit_from_parent(struct task_struct *parent,
+ u64 clone_flags, u64 now) {
+ struct bore_bc bc_val;
+
+ if (clone_flags & CLONE_PARENT)
+ parent = rcu_dereference(parent->real_parent);
+
+ struct bore_bc *bc = &parent->bore.subtree;
+
+ if (burst_cache_expired(bc, now)) {
+ struct task_struct *child;
+ u32 count = 0, total = 0, scan_count = 0;
+ for_each_child_task(parent, child) {
+ if (count >= BURST_CACHE_SAMPLE_LIMIT) break;
+ if (scan_count++ >= BURST_CACHE_SCAN_LIMIT) break;
+
+ if (!task_is_bore_eligible(child)) continue;
+ count++;
+ total += child->bore.penalty;
+ }
+
+ update_burst_cache(bc, parent, count, total, now);
+ }
+
+ bc_val.value = READ_ONCE(bc->value);
+ return (u32)bc_val.penalty;
+}
+
+static u32 inherit_from_ancestor_hub(struct task_struct *parent,
+ u64 clone_flags, u64 now) {
+ struct bore_bc bc_val;
+ struct task_struct *ancestor = parent;
+ u32 sole_child_count = 0;
+
+ if (clone_flags & CLONE_PARENT) {
+ ancestor = rcu_dereference(ancestor->real_parent);
+ sole_child_count = 1;
+ }
+
+ for (struct task_struct *next;
+ (next = rcu_dereference(ancestor->real_parent)) != ancestor &&
+ count_children_upto2(ancestor) <= sole_child_count;
+ ancestor = next, sole_child_count = 1) {}
+
+ struct bore_bc *bc = &ancestor->bore.subtree;
+
+ if (burst_cache_expired(bc, now)) {
+ struct task_struct *direct_child;
+ u32 count = 0, total = 0, scan_count = 0;
+ for_each_child_task(ancestor, direct_child) {
+ if (count >= BURST_CACHE_SAMPLE_LIMIT) break;
+ if (scan_count++ >= BURST_CACHE_SCAN_LIMIT) break;
+
+ struct task_struct *descendant = direct_child;
+ while (count_children_upto2(descendant) == 1) {
+ struct task_struct *next_descendant =
+ list_first_or_null_rcu(&descendant->children,
+ struct task_struct, sibling);
+ if (!next_descendant) break;
+ descendant = next_descendant;
+ }
+
+ if (!task_is_bore_eligible(descendant)) continue;
+ count++;
+ total += descendant->bore.penalty;
+ }
+
+ update_burst_cache(bc, ancestor, count, total, now);
+ }
+
+ bc_val.value = READ_ONCE(bc->value);
+ return (u32)bc_val.penalty;
+}
+
+static u32 inherit_from_thread_group(struct task_struct *p, u64 now) {
+ struct bore_bc bc_val;
+ struct task_struct *leader = p->group_leader;
+ struct bore_bc *bc = &leader->bore.group;
+
+ if (burst_cache_expired(bc, now)) {
+ struct task_struct *sibling;
+ u32 count = 0, total = 0, scan_count = 0;
+
+ for_each_thread(leader, sibling) {
+ if (count >= BURST_CACHE_SAMPLE_LIMIT) break;
+ if (scan_count++ >= BURST_CACHE_SCAN_LIMIT) break;
+
+ if (!task_is_bore_eligible(sibling)) continue;
+ count++;
+ total += sibling->bore.penalty;
+ }
+
+ update_burst_cache(bc, leader, count, total, now);
+ }
+
+ bc_val.value = READ_ONCE(bc->value);
+ return (u32)bc_val.penalty;
+}
+
+void task_fork_bore(struct task_struct *p,
+ struct task_struct *parent, u64 clone_flags, u64 now) {
+ if (!static_branch_likely(&sched_bore_key) || !task_is_bore_eligible(p)) return;
+
+ rcu_read_lock();
+ struct bore_ctx *ctx = &p->bore;
+ u32 inherited_penalty;
+ if (clone_flags & CLONE_THREAD)
+ inherited_penalty = inherit_from_thread_group(parent, now);
+ else if (static_branch_likely(&sched_burst_inherit_key))
+ inherited_penalty = static_branch_likely(&sched_burst_ancestor_key)?
+ inherit_from_ancestor_hub(parent, clone_flags, now):
+ inherit_from_parent(parent, clone_flags, now);
+ else
+ inherited_penalty = 0;
+
+ if (ctx->prev_penalty < inherited_penalty)
+ ctx->prev_penalty = inherited_penalty;
+ ctx->curr_penalty = 0;
+ ctx->burst_time = 0;
+ ctx->stop_update = false;
+ ctx->futex_waiting = false;
+ update_penalty(p);
+ rcu_read_unlock();
+}
+
+void reset_task_bore(struct task_struct *p)
+{ memset(&p->bore, 0, sizeof(struct bore_ctx)); }
+
+static void update_inherit_type(void) {
+ switch(sched_burst_inherit_type) {
+ case 1:
+ static_branch_enable(&sched_burst_inherit_key);
+ static_branch_disable(&sched_burst_ancestor_key);
+ break;
+ case 2:
+ static_branch_enable(&sched_burst_inherit_key);
+ static_branch_enable(&sched_burst_ancestor_key);
+ break;
+ default:
+ static_branch_disable(&sched_burst_inherit_key);
+ break;
+ }
+}
+
+void __init sched_init_bore(void) {
+ printk(KERN_INFO "%s %s by %s\n",
+ SCHED_BORE_PROGNAME, SCHED_BORE_VERSION, SCHED_BORE_AUTHOR);
+
+ for (int i = 1; i <= BURST_CACHE_SAMPLE_LIMIT; i++)
+ bore_reciprocal_lut[i] = (u32)div64_u64(0xffffffffULL + i, i);
+
+ reset_task_bore(&init_task);
+ update_inherit_type();
+}
+
+static void readjust_all_task_weights(void) {
+ struct task_struct *task;
+ struct rq *rq;
+ struct rq_flags rf;
+
+ scoped_guard(write_lock_irq, &tasklist_lock)
+ for_each_process(task) {
+ if (!task_is_bore_eligible(task)) continue;
+ rq = task_rq_lock(task, &rf);
+ update_rq_clock(rq);
+ reweight_task_by_prio(task, effective_prio_bore(task));
+ task_rq_unlock(rq, task, &rf);
+ }
+}
+
+int sched_bore_update_handler(const struct ctl_table *table,
+ int write, void __user *buffer, size_t *lenp, loff_t *ppos) {
+ int ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
+ if (ret || !write)
+ return ret;
+
+ if (sched_bore)
+ static_branch_enable(&sched_bore_key);
+ else
+ static_branch_disable(&sched_bore_key);
+
+ readjust_all_task_weights();
+
+ return 0;
+}
+
+int sched_burst_inherit_type_update_handler(const struct ctl_table *table,
+ int write, void __user *buffer, size_t *lenp, loff_t *ppos) {
+ int ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
+ if (ret || !write)
+ return ret;
+
+ update_inherit_type();
+
+ return 0;
+}
+
+int sched_burst_protect_slice_lv_update_handler(const struct ctl_table *table,
+ int write, void __user *buffer, size_t *lenp, loff_t *ppos) {
+ int ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
+ if (ret || !write)
+ return ret;
+
+ if (sched_burst_protect_slice_lv == 1 ||
+ sched_burst_protect_slice_lv == 2)
+ static_branch_enable(&sched_burst_protect_slice_cond_key);
+ else
+ static_branch_disable(&sched_burst_protect_slice_cond_key);
+
+ if (sched_burst_protect_slice_lv >= 2)
+ static_branch_enable(&sched_burst_protect_slice_prefer_key);
+ else
+ static_branch_disable(&sched_burst_protect_slice_prefer_key);
+
+ return 0;
+}
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table sched_bore_sysctls[] = {
+ {
+ .procname = "sched_bore",
+ .data = &sched_bore,
+ .maxlen = sizeof(u8),
+ .mode = 0644,
+ .proc_handler = sched_bore_update_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "sched_burst_inherit_type",
+ .data = &sched_burst_inherit_type,
+ .maxlen = sizeof(u8),
+ .mode = 0644,
+ .proc_handler = sched_burst_inherit_type_update_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_TWO,
+ },
+ {
+ .procname = "sched_burst_smoothness",
+ .data = &sched_burst_smoothness,
+ .maxlen = sizeof(u8),
+ .mode = 0644,
+ .proc_handler = proc_dou8vec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_THREE,
+ },
+ {
+ .procname = "sched_burst_penalty_offset",
+ .data = &sched_burst_penalty_offset,
+ .maxlen = sizeof(u8),
+ .mode = 0644,
+ .proc_handler = proc_dou8vec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &maxval_6_bits,
+ },
+ {
+ .procname = "sched_burst_penalty_scale",
+ .data = &sched_burst_penalty_scale,
+ .maxlen = sizeof(uint),
+ .mode = 0644,
+ .proc_handler = proc_douintvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &maxval_12_bits,
+ },
+ {
+ .procname = "sched_burst_cache_lifetime",
+ .data = &sched_burst_cache_lifetime,
+ .maxlen = sizeof(uint),
+ .mode = 0644,
+ .proc_handler = proc_douintvec,
+ },
+ {
+ .procname = "sched_burst_protect_slice_lv",
+ .data = &sched_burst_protect_slice_lv,
+ .maxlen = sizeof(u8),
+ .mode = 0644,
+ .proc_handler = sched_burst_protect_slice_lv_update_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_THREE,
+ },
+};
+
+static int __init sched_bore_sysctl_init(void) {
+ register_sysctl_init("kernel", sched_bore_sysctls);
+ return 0;
+}
+late_initcall(sched_bore_sysctl_init);
+
+#endif // CONFIG_SYSCTL
+#endif /* CONFIG_SCHED_BORE */
diff --git a/kernel/sched/build_utility.c b/kernel/sched/build_utility.c
--- a/kernel/sched/build_utility.c
+++ b/kernel/sched/build_utility.c
@@ -54,6 +54,10 @@
#include "stats.h"
#include "autogroup.h"
+#ifdef CONFIG_SCHED_BORE
+#include <linux/sched/bore.h>
+#endif /* CONFIG_SCHED_BORE */
+
#include "clock.c"
#ifdef CONFIG_CGROUP_CPUACCT
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -100,6 +100,10 @@
#include "../smpboot.h"
#include "../locking/mutex.h"
+#ifdef CONFIG_SCHED_BORE
+#include <linux/sched/bore.h>
+#endif /* CONFIG_SCHED_BORE */
+
EXPORT_TRACEPOINT_SYMBOL_GPL(ipi_send_cpu);
EXPORT_TRACEPOINT_SYMBOL_GPL(ipi_send_cpumask);
@@ -1534,7 +1538,11 @@ int tg_nop(struct task_group *tg, void *data)
void set_load_weight(struct task_struct *p, bool update_load)
{
+#ifdef CONFIG_SCHED_BORE
+ int prio = effective_prio_bore(p);
+#else /* !CONFIG_SCHED_BORE */
int prio = p->static_prio - MAX_RT_PRIO;
+#endif /* CONFIG_SCHED_BORE */
struct load_weight lw;
if (task_has_idle_policy(p)) {
@@ -8989,6 +8997,10 @@ void __init sched_init(void)
BUG_ON(!sched_class_above(&ext_sched_class, &idle_sched_class));
#endif
+#ifdef CONFIG_SCHED_BORE
+ sched_init_bore();
+#endif /* CONFIG_SCHED_BORE */
+
wait_bit_init();
#ifdef CONFIG_FAIR_GROUP_SCHED
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -170,6 +170,53 @@ static const struct file_operations sched_feat_fops = {
.release = single_release,
};
+#ifdef CONFIG_SCHED_BORE
+#define DEFINE_SYSCTL_SCHED_FUNC(name, update_func) \
+static ssize_t sched_##name##_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos) \
+{ \
+ char buf[16]; \
+ unsigned int value; \
+\
+ if (cnt > 15) \
+ cnt = 15; \
+\
+ if (copy_from_user(&buf, ubuf, cnt)) \
+ return -EFAULT; \
+ buf[cnt] = '\0'; \
+\
+ if (kstrtouint(buf, 10, &value)) \
+ return -EINVAL; \
+\
+ sysctl_sched_##name = value; \
+ sched_update_##update_func(); \
+\
+ *ppos += cnt; \
+ return cnt; \
+} \
+\
+static int sched_##name##_show(struct seq_file *m, void *v) \
+{ \
+ seq_printf(m, "%d\n", sysctl_sched_##name); \
+ return 0; \
+} \
+\
+static int sched_##name##_open(struct inode *inode, struct file *filp) \
+{ \
+ return single_open(filp, sched_##name##_show, NULL); \
+} \
+\
+static const struct file_operations sched_##name##_fops = { \
+ .open = sched_##name##_open, \
+ .write = sched_##name##_write, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+};
+
+DEFINE_SYSCTL_SCHED_FUNC(min_base_slice, min_base_slice)
+
+#undef DEFINE_SYSCTL_SCHED_FUNC
+#else /* !CONFIG_SCHED_BORE */
static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
@@ -209,6 +256,7 @@ static const struct file_operations sched_scaling_fops = {
.llseek = seq_lseek,
.release = single_release,
};
+#endif /* CONFIG_SCHED_BORE */
#ifdef CONFIG_SCHED_CACHE
static ssize_t
@@ -645,12 +693,19 @@ static __init int sched_init_debug(void)
debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops);
#endif
+#ifdef CONFIG_SCHED_BORE
+ debugfs_create_file("min_base_slice_ns", 0644, debugfs_sched, NULL, &sched_min_base_slice_fops);
+ debugfs_create_u32("base_slice_ns", 0444, debugfs_sched, &sysctl_sched_base_slice);
+#else /* !CONFIG_SCHED_BORE */
debugfs_create_u32("base_slice_ns", 0644, debugfs_sched, &sysctl_sched_base_slice);
+#endif /* CONFIG_SCHED_BORE */
debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms);
debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once);
+#if !defined(CONFIG_SCHED_BORE)
debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops);
+#endif /* CONFIG_SCHED_BORE */
debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost);
debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate);
@@ -911,6 +966,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)),
SPLIT_NS(schedstat_val_or_zero(p->stats.sum_block_runtime)));
+#ifdef CONFIG_SCHED_BORE
+ SEQ_printf(m, " %2d", bore_score(p));
+#endif /* CONFIG_SCHED_BORE */
#ifdef CONFIG_NUMA_BALANCING
SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));
#endif
@@ -1401,6 +1459,9 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
__PS("nr_involuntary_switches", p->nivcsw);
P(se.load.weight);
+#ifdef CONFIG_SCHED_BORE
+ __PS("bore.score", bore_score(p));
+#endif /* CONFIG_SCHED_BORE */
P(se.avg.load_sum);
P(se.avg.runnable_sum);
P(se.avg.util_sum);
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -58,6 +58,10 @@
#include "stats.h"
#include "autogroup.h"
+#ifdef CONFIG_SCHED_BORE
+#include <linux/sched/bore.h>
+#endif /* CONFIG_SCHED_BORE */
+
/*
* The initial- and re-scaling of tunables is configurable
*
@@ -67,17 +71,30 @@
* SCHED_TUNABLESCALING_LOG - scaled logarithmically, *1+ilog(ncpus)
* SCHED_TUNABLESCALING_LINEAR - scaled linear, *ncpus
*
- * (default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
+ * BORE : default SCHED_TUNABLESCALING_NONE = *1 constant
+ * EEVDF: default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
*/
+#ifdef CONFIG_SCHED_BORE
+unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
+#else /* !CONFIG_SCHED_BORE */
unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_LOG;
+#endif /* CONFIG_SCHED_BORE */
/*
* Minimal preemption granularity for CPU-bound tasks:
*
- * (default: 0.70 msec * (1 + ilog(ncpus)), units: nanoseconds)
+ * BORE : base_slice = minimum multiple of nsecs_per_tick >= min_base_slice
+ * (default min_base_slice = 2000000 constant, units: nanoseconds)
+ * EEVDF: default 0.70 msec * (1 + ilog(ncpus)), units: nanoseconds
*/
+#ifdef CONFIG_SCHED_BORE
+static const unsigned int nsecs_per_tick = 1000000000ULL / HZ;
+unsigned int sysctl_sched_min_base_slice = CONFIG_MIN_BASE_SLICE_NS;
+__read_mostly uint sysctl_sched_base_slice = nsecs_per_tick;
+#else /* !CONFIG_SCHED_BORE */
unsigned int sysctl_sched_base_slice = 700000ULL;
static unsigned int normalized_sysctl_sched_base_slice = 700000ULL;
+#endif /* CONFIG_SCHED_BORE */
__read_mostly unsigned int sysctl_sched_migration_cost = 500000UL;
@@ -189,6 +206,13 @@ static inline void update_load_set(struct load_weight *lw, unsigned long w)
*
* This idea comes from the SD scheduler of Con Kolivas:
*/
+#ifdef CONFIG_SCHED_BORE
+static void update_sysctl(void) {
+ sysctl_sched_base_slice = nsecs_per_tick *
+ max(1UL, DIV_ROUND_UP(sysctl_sched_min_base_slice, nsecs_per_tick));
+}
+void sched_update_min_base_slice(void) { update_sysctl(); }
+#else /* !CONFIG_SCHED_BORE */
static unsigned int get_update_sysctl_factor(void)
{
unsigned int cpus = min_t(unsigned int, num_online_cpus(), 8);
@@ -219,6 +243,7 @@ static void update_sysctl(void)
SET_SYSCTL(sched_base_slice);
#undef SET_SYSCTL
}
+#endif /* CONFIG_SCHED_BORE */
void __init sched_init_granularity(void)
{
@@ -1093,7 +1118,11 @@ struct sched_entity *__pick_first_entity(struct cfs_rq *cfs_rq)
*/
static inline void set_protect_slice(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
+#ifdef CONFIG_SCHED_BORE
+ u64 slice = sysctl_sched_base_slice;
+#else /* CONFIG_SCHED_BORE */
u64 slice = normalized_sysctl_sched_base_slice;
+#endif /* CONFIG_SCHED_BORE */
u64 vprot = se->deadline;
if (sched_feat(RUN_TO_PARITY))
@@ -1170,8 +1199,17 @@ static struct sched_entity *pick_eevdf(struct cfs_rq *cfs_rq, bool protect)
if (curr && (!curr->on_rq || !entity_eligible(cfs_rq, curr)))
curr = NULL;
- if (curr && protect && protect_slice(curr))
- return curr;
+ if (curr && protect && protect_slice(curr)) {
+#ifdef CONFIG_SCHED_BORE
+ if (static_branch_likely(&sched_bore_key)) {
+ if ((static_branch_likely(&sched_burst_protect_slice_cond_key) ||
+ static_branch_unlikely(&sched_burst_protect_slice_prefer_key)) &&
+ (!entity_is_task(curr) || !task_of(curr)->bore.futex_waiting))
+ return curr;
+ } else
+#endif /* CONFIG_SCHED_BORE */
+ return curr;
+ }
/* Pick the leftmost entity if it's eligible */
if (se && entity_eligible(cfs_rq, se)) {
@@ -1227,6 +1265,7 @@ struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
/**************************************************************
* Scheduling class statistics methods:
*/
+#if !defined(CONFIG_SCHED_BORE)
int sched_update_scaling(void)
{
unsigned int factor = get_update_sysctl_factor();
@@ -1238,6 +1277,7 @@ int sched_update_scaling(void)
return 0;
}
+#endif /* CONFIG_SCHED_BORE */
static void clear_buddies(struct cfs_rq *cfs_rq, struct sched_entity *se);
@@ -1979,6 +2019,38 @@ static void account_llc_dequeue(struct rq *rq, struct task_struct *p) {}
#endif /* CONFIG_SCHED_CACHE */
+#ifdef CONFIG_SCHED_BORE
+static inline bool do_preempt_weight(struct cfs_rq *cfs_rq,
+ struct sched_entity *pse, struct sched_entity *se)
+{
+ /*
+ * Companion to the PREEMPT_SHORT path: where that lets a shorter-slice
+ * waker cancel current's slice protection, this lets a heavier (under
+ * BORE: more interactive) waker do so. No RUN_TO_PARITY gate -- in 7.0
+ * the slice protection (vprot) exists regardless of RUN_TO_PARITY, so
+ * the weight bypass must apply either way.
+ */
+ if (!static_branch_likely(&sched_burst_protect_slice_cond_key))
+ return false;
+
+ if (static_branch_unlikely(&sched_burst_protect_slice_prefer_key)
+ ? (pse->load.weight <= se->load.weight)
+ : (pse->load.weight < se->load.weight))
+ return false;
+
+ if (!entity_eligible(cfs_rq, pse))
+ return false;
+
+ if (entity_before(pse, se))
+ return true;
+
+ if (!entity_eligible(cfs_rq, se))
+ return true;
+
+ return false;
+}
+#endif /* CONFIG_SCHED_BORE */
+
/*
* Used by other classes to account runtime.
*/
@@ -2014,6 +2086,11 @@ static void update_curr(struct cfs_rq *cfs_rq)
resched = update_deadline(cfs_rq, curr);
if (entity_is_task(curr)) {
+#ifdef CONFIG_SCHED_BORE
+ struct task_struct *p = task_of(curr);
+ update_curr_bore(p, delta_exec);
+#endif /* CONFIG_SCHED_BORE */
+
/*
* If the fair_server is active, we need to account for the
* fair_server time whether or not the task is running on
@@ -4671,8 +4748,8 @@ rescale_entity(struct sched_entity *se, unsigned long weight, bool rel_vprot)
se->vprot = div64_long(se->vprot * old_weight, weight);
}
-static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
- unsigned long weight)
+void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
+ unsigned long weight)
{
bool curr = cfs_rq->curr == se;
bool rel_vprot = false;
@@ -5976,13 +6053,12 @@ void __setparam_fair(struct task_struct *p, const struct sched_attr *attr)
static void
place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
{
- u64 vslice, vruntime = avg_vruntime(cfs_rq);
+ u64 vslice = 0, vruntime = avg_vruntime(cfs_rq);
bool update_zero = false;
s64 lag = 0;
if (!se->custom_slice)
se->slice = sysctl_sched_base_slice;
- vslice = calc_delta_fair(se->slice, se);
/*
* Due to how V is constructed as the weighted average of entities,
@@ -6094,7 +6170,18 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
se->rel_deadline = 0;
return;
}
-
+#ifdef CONFIG_SCHED_BORE
+ if (static_branch_likely(&sched_bore_key) &&
+ entity_is_task(se) &&
+ task_of(se)->bore.futex_waiting)
+ goto vslice_found;
+#endif /* !CONFIG_SCHED_BORE */
+ vslice = calc_delta_fair(se->slice, se);
+#ifdef CONFIG_SCHED_BORE
+ if (static_branch_likely(&sched_bore_key))
+ vslice >>= !!(flags & (ENQUEUE_INITIAL | ENQUEUE_WAKEUP));
+ else
+#endif /* CONFIG_SCHED_BORE */
/*
* When joining the competition; the existing tasks will be,
* on average, halfway through their slice, as such start tasks
@@ -6103,6 +6190,9 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
if (sched_feat(PLACE_DEADLINE_INITIAL) && (flags & ENQUEUE_INITIAL))
vslice /= 2;
+#ifdef CONFIG_SCHED_BORE
+vslice_found:
+#endif /* CONFIG_SCHED_BORE */
/*
* EEVDF: vd_i = ve_i + r_i/w_i
*/
@@ -6113,7 +6203,7 @@ static void check_enqueue_throttle(struct cfs_rq *cfs_rq);
static inline int cfs_rq_throttled(struct cfs_rq *cfs_rq);
static void
-requeue_delayed_entity(struct sched_entity *se);
+requeue_delayed_entity(struct sched_entity *se, int flags);
static void
enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
@@ -7776,7 +7866,7 @@ static int choose_idle_cpu(int cpu, struct task_struct *p)
}
static void
-requeue_delayed_entity(struct sched_entity *se)
+requeue_delayed_entity(struct sched_entity *se, int flags)
{
struct cfs_rq *cfs_rq = cfs_rq_of(se);
@@ -7794,7 +7884,13 @@ requeue_delayed_entity(struct sched_entity *se)
cfs_rq->nr_queued--;
if (se != cfs_rq->curr)
__dequeue_entity(cfs_rq, se);
- place_entity(cfs_rq, se, 0);
+#ifdef CONFIG_SCHED_BORE
+ if (static_branch_likely(&sched_bore_key))
+ flags |= ENQUEUE_WAKEUP;
+ else
+#endif /* CONFIG_SCHED_BORE */
+ flags = 0;
+ place_entity(cfs_rq, se, flags);
if (se != cfs_rq->curr)
__enqueue_entity(cfs_rq, se);
cfs_rq->nr_queued++;
@@ -7833,7 +7929,7 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags)
util_est_enqueue(&rq->cfs, p);
if (flags & ENQUEUE_DELAYED) {
- requeue_delayed_entity(se);
+ requeue_delayed_entity(se, flags);
return;
}
@@ -7851,7 +7947,7 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags)
for_each_sched_entity(se) {
if (se->on_rq) {
if (se->sched_delayed)
- requeue_delayed_entity(se);
+ requeue_delayed_entity(se, flags);
break;
}
cfs_rq = cfs_rq_of(se);
@@ -8054,6 +8150,15 @@ static bool dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)
if (!p->se.sched_delayed)
util_est_dequeue(&rq->cfs, p);
+#ifdef CONFIG_SCHED_BORE
+ struct cfs_rq *cfs_rq = cfs_rq_of(&p->se);
+ struct sched_entity *se = &p->se;
+ if ((flags & DEQUEUE_SLEEP) && entity_is_task(se)) {
+ if (cfs_rq->curr == se)
+ update_curr(cfs_rq);
+ restart_burst_bore(p);
+ }
+#endif /* CONFIG_SCHED_BORE */
if (dequeue_entities(rq, &p->se, flags) < 0)
return false;
@@ -9860,6 +9965,18 @@ static void wakeup_preempt_fair(struct rq *rq, struct task_struct *p, int wake_f
goto pick;
}
+#ifdef CONFIG_SCHED_BORE
+ /*
+ * Likewise, if @p is heavier than current (under BORE: more
+ * interactive), per kernel.sched_burst_protect_slice_lv, override
+ * current's slice protection to allow preemption.
+ */
+ if (do_preempt_weight(cfs_rq, pse, se)) {
+ preempt_action = PREEMPT_WAKEUP_SHORT;
+ goto pick;
+ }
+#endif
+
/*
* Ignore wakee preemption on WF_FORK as it is less likely that
* there is shared data as exec often follow fork. Do not
@@ -10030,16 +10147,25 @@ static void yield_task_fair(struct rq *rq)
/*
* Are we the only task in the tree?
*/
+#if !defined(CONFIG_SCHED_BORE)
if (unlikely(rq->nr_running == 1))
return;
clear_buddies(cfs_rq, se);
+#endif /* CONFIG_SCHED_BORE */
update_rq_clock(rq);
/*
* Update run-time statistics of the 'current'.
*/
update_curr(cfs_rq);
+#ifdef CONFIG_SCHED_BORE
+ restart_burst_rescale_deadline_bore(curr);
+ if (unlikely(rq->nr_running == 1))
+ return;
+
+ clear_buddies(cfs_rq, se);
+#endif /* CONFIG_SCHED_BORE */
/*
* Tell update_rq_clock() that we've just updated,
* so we don't do microscopic update in schedule()
@@ -15022,6 +15148,9 @@ static void switched_to_fair(struct rq *rq, struct task_struct *p)
WARN_ON_ONCE(p->se.sched_delayed);
attach_task_cfs_rq(p);
+#ifdef CONFIG_SCHED_BORE
+ reset_task_bore(p);
+#endif /* CONFIG_SCHED_BORE */
set_task_max_allowed_capacity(p);
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -2267,7 +2267,11 @@ extern int group_balance_cpu(struct sched_group *sg);
extern void update_sched_domain_debugfs(void);
extern void dirty_sched_domain_sysctl(int cpu);
+#ifdef CONFIG_SCHED_BORE
+extern void sched_update_min_base_slice(void);
+#else /* !CONFIG_SCHED_BORE */
extern int sched_update_scaling(void);
+#endif /* CONFIG_SCHED_BORE */
static inline const struct cpumask *task_user_cpus(struct task_struct *p)
{
@@ -3112,7 +3116,12 @@ static inline void attach_one_task(struct rq *rq, struct task_struct *p)
extern __read_mostly unsigned int sysctl_sched_nr_migrate;
extern __read_mostly unsigned int sysctl_sched_migration_cost;
+#ifdef CONFIG_SCHED_BORE
+extern unsigned int sysctl_sched_min_base_slice;
+extern __read_mostly uint sysctl_sched_base_slice;
+#else /* !CONFIG_SCHED_BORE */
extern unsigned int sysctl_sched_base_slice;
+#endif /* CONFIG_SCHED_BORE */
extern int sysctl_resched_latency_warn_ms;
extern int sysctl_resched_latency_warn_once;
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