diff options
Diffstat (limited to 'sys-kernel/linux-image-redcore-lts/files/5.15-0001-linux5.15.y-bore5.1.0.patch')
-rw-r--r-- | sys-kernel/linux-image-redcore-lts/files/5.15-0001-linux5.15.y-bore5.1.0.patch | 530 |
1 files changed, 0 insertions, 530 deletions
diff --git a/sys-kernel/linux-image-redcore-lts/files/5.15-0001-linux5.15.y-bore5.1.0.patch b/sys-kernel/linux-image-redcore-lts/files/5.15-0001-linux5.15.y-bore5.1.0.patch deleted file mode 100644 index 365ef1f2..00000000 --- a/sys-kernel/linux-image-redcore-lts/files/5.15-0001-linux5.15.y-bore5.1.0.patch +++ /dev/null @@ -1,530 +0,0 @@ -From 60a78397ed1cce95e3d1b22b0ea4adf9f2141de7 Mon Sep 17 00:00:00 2001 -From: Masahito S <firelzrd@gmail.com> -Date: Thu, 28 Mar 2024 00:47:09 +0900 -Subject: [PATCH] linux5.15.y-bore5.1.0 - ---- - include/linux/sched.h | 10 +++ - init/Kconfig | 17 +++++ - kernel/sched/core.c | 143 ++++++++++++++++++++++++++++++++++++++++++ - kernel/sched/debug.c | 3 + - kernel/sched/fair.c | 122 ++++++++++++++++++++++++++++++----- - kernel/sysctl.c | 76 ++++++++++++++++++++++ - 6 files changed, 357 insertions(+), 14 deletions(-) - -diff --git a/include/linux/sched.h b/include/linux/sched.h -index 7bfc2b45cd..7058ceab13 100644 ---- a/include/linux/sched.h -+++ b/include/linux/sched.h -@@ -535,6 +535,16 @@ struct sched_entity { - u64 sum_exec_runtime; - u64 vruntime; - u64 prev_sum_exec_runtime; -+#ifdef CONFIG_SCHED_BORE -+ u64 burst_time; -+ u8 prev_burst_penalty; -+ u8 curr_burst_penalty; -+ u8 burst_penalty; -+ u8 burst_score; -+ u8 child_burst; -+ u32 child_burst_cnt; -+ u64 child_burst_last_cached; -+#endif // CONFIG_SCHED_BORE - - u64 nr_migrations; - -diff --git a/init/Kconfig b/init/Kconfig -index dafc3ba6fa..64bcc7e6e5 100644 ---- a/init/Kconfig -+++ b/init/Kconfig -@@ -1266,6 +1266,23 @@ 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/sched/core.c b/kernel/sched/core.c -index 25b8ea9116..937c0abb86 100644 ---- a/kernel/sched/core.c -+++ b/kernel/sched/core.c -@@ -4221,6 +4221,138 @@ int wake_up_state(struct task_struct *p, unsigned int state) - return try_to_wake_up(p, state, 0); - } - -+#ifdef CONFIG_SCHED_BORE -+extern u8 sched_burst_fork_atavistic; -+extern uint sched_burst_cache_lifetime; -+ -+static void __init sched_init_bore(void) { -+ init_task.se.burst_time = 0; -+ init_task.se.prev_burst_penalty = 0; -+ init_task.se.curr_burst_penalty = 0; -+ init_task.se.burst_penalty = 0; -+ init_task.se.burst_score = 0; -+ init_task.se.child_burst_last_cached = 0; -+} -+ -+void inline sched_fork_bore(struct task_struct *p) { -+ p->se.burst_time = 0; -+ p->se.curr_burst_penalty = 0; -+ p->se.burst_score = 0; -+ p->se.child_burst_last_cached = 0; -+} -+ -+static u32 count_child_tasks(struct task_struct *p) { -+ struct task_struct *child; -+ u32 cnt = 0; -+ list_for_each_entry(child, &p->children, sibling) {cnt++;} -+ return cnt; -+} -+ -+static inline bool task_is_inheritable(struct task_struct *p) { -+ return (p->sched_class == &fair_sched_class); -+} -+ -+static inline bool child_burst_cache_expired(struct task_struct *p, u64 now) { -+ u64 expiration_time = -+ p->se.child_burst_last_cached + sched_burst_cache_lifetime; -+ return ((s64)(expiration_time - now) < 0); -+} -+ -+static void __update_child_burst_cache( -+ struct task_struct *p, u32 cnt, u32 sum, u64 now) { -+ u8 avg = 0; -+ if (cnt) avg = sum / cnt; -+ p->se.child_burst = max(avg, p->se.burst_penalty); -+ p->se.child_burst_cnt = cnt; -+ p->se.child_burst_last_cached = now; -+} -+ -+static inline void update_child_burst_direct(struct task_struct *p, u64 now) { -+ struct task_struct *child; -+ u32 cnt = 0; -+ u32 sum = 0; -+ -+ list_for_each_entry(child, &p->children, sibling) { -+ if (!task_is_inheritable(child)) continue; -+ cnt++; -+ sum += child->se.burst_penalty; -+ } -+ -+ __update_child_burst_cache(p, cnt, sum, now); -+} -+ -+static inline u8 __inherit_burst_direct(struct task_struct *p, u64 now) { -+ struct task_struct *parent = p->real_parent; -+ if (child_burst_cache_expired(parent, now)) -+ update_child_burst_direct(parent, now); -+ -+ return parent->se.child_burst; -+} -+ -+static void update_child_burst_topological( -+ struct task_struct *p, u64 now, u32 depth, u32 *acnt, u32 *asum) { -+ struct task_struct *child, *dec; -+ u32 cnt = 0, dcnt = 0; -+ u32 sum = 0; -+ -+ list_for_each_entry(child, &p->children, sibling) { -+ dec = child; -+ while ((dcnt = count_child_tasks(dec)) == 1) -+ dec = list_first_entry(&dec->children, struct task_struct, sibling); -+ -+ if (!dcnt || !depth) { -+ if (!task_is_inheritable(dec)) continue; -+ cnt++; -+ sum += dec->se.burst_penalty; -+ continue; -+ } -+ if (!child_burst_cache_expired(dec, now)) { -+ cnt += dec->se.child_burst_cnt; -+ sum += (u32)dec->se.child_burst * dec->se.child_burst_cnt; -+ continue; -+ } -+ update_child_burst_topological(dec, now, depth - 1, &cnt, &sum); -+ } -+ -+ __update_child_burst_cache(p, cnt, sum, now); -+ *acnt += cnt; -+ *asum += sum; -+} -+ -+static inline u8 __inherit_burst_topological(struct task_struct *p, u64 now) { -+ struct task_struct *anc = p->real_parent; -+ u32 cnt = 0, sum = 0; -+ -+ while (anc->real_parent != anc && count_child_tasks(anc) == 1) -+ anc = anc->real_parent; -+ -+ if (child_burst_cache_expired(anc, now)) -+ update_child_burst_topological( -+ anc, now, sched_burst_fork_atavistic - 1, &cnt, &sum); -+ -+ return anc->se.child_burst; -+} -+ -+static inline void inherit_burst(struct task_struct *p) { -+ u8 burst_cache; -+ u64 now = ktime_get_ns(); -+ -+ read_lock(&tasklist_lock); -+ burst_cache = likely(sched_burst_fork_atavistic)? -+ __inherit_burst_topological(p, now): -+ __inherit_burst_direct(p, now); -+ read_unlock(&tasklist_lock); -+ -+ p->se.prev_burst_penalty = max(p->se.prev_burst_penalty, burst_cache); -+} -+ -+static void sched_post_fork_bore(struct task_struct *p) { -+ if (p->sched_class == &fair_sched_class) -+ inherit_burst(p); -+ p->se.burst_penalty = p->se.prev_burst_penalty; -+} -+#endif // CONFIG_SCHED_BORE -+ - /* - * Perform scheduler related setup for a newly forked process p. - * p is forked by current. -@@ -4237,6 +4369,9 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p) - p->se.prev_sum_exec_runtime = 0; - p->se.nr_migrations = 0; - p->se.vruntime = 0; -+#ifdef CONFIG_SCHED_BORE -+ sched_fork_bore(p); -+#endif // CONFIG_SCHED_BORE - INIT_LIST_HEAD(&p->se.group_node); - - #ifdef CONFIG_FAIR_GROUP_SCHED -@@ -4469,6 +4604,9 @@ void sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs) - - void sched_post_fork(struct task_struct *p) - { -+#ifdef CONFIG_SCHED_BORE -+ sched_post_fork_bore(p); -+#endif // CONFIG_SCHED_BORE - uclamp_post_fork(p); - } - -@@ -9381,6 +9519,11 @@ void __init sched_init(void) - BUG_ON(&dl_sched_class + 1 != &stop_sched_class); - #endif - -+#ifdef CONFIG_SCHED_BORE -+ sched_init_bore(); -+ printk(KERN_INFO "BORE (Burst-Oriented Response Enhancer) CPU Scheduler modification 5.1.0 by Masahito Suzuki"); -+#endif // CONFIG_SCHED_BORE -+ - wait_bit_init(); - - #ifdef CONFIG_FAIR_GROUP_SCHED -diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c -index 5ffe16ff03..de5345d03b 100644 ---- a/kernel/sched/debug.c -+++ b/kernel/sched/debug.c -@@ -545,6 +545,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) - SPLIT_NS(p->se.sum_exec_runtime), - SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime))); - -+#ifdef CONFIG_SCHED_BORE -+ SEQ_printf(m, " %2d", p->se.burst_score); -+#endif // CONFIG_SCHED_BORE - #ifdef CONFIG_NUMA_BALANCING - SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p)); - #endif -diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c -index fd8b565664..8c4c060510 100644 ---- a/kernel/sched/fair.c -+++ b/kernel/sched/fair.c -@@ -19,6 +19,9 @@ - * - * Adaptive scheduling granularity, math enhancements by Peter Zijlstra - * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra -+ * -+ * Burst-Oriented Response Enhancer (BORE) CPU Scheduler -+ * Copyright (C) 2021-2024 Masahito Suzuki <firelzrd@gmail.com> - */ - #include "sched.h" - -@@ -84,6 +87,74 @@ static unsigned int normalized_sysctl_sched_wakeup_granularity = 1000000UL; - - const_debug unsigned int sysctl_sched_migration_cost = 500000UL; - -+#ifdef CONFIG_SCHED_BORE -+bool __read_mostly sched_bore = 1; -+bool __read_mostly sched_burst_smoothness_long = 1; -+bool __read_mostly sched_burst_smoothness_short = 0; -+u8 __read_mostly sched_burst_fork_atavistic = 2; -+u8 __read_mostly sched_burst_penalty_offset = 22; -+uint __read_mostly sched_burst_penalty_scale = 1280; -+uint __read_mostly sched_burst_cache_lifetime = 60000000; -+ -+#define MAX_BURST_PENALTY (39U <<2) -+ -+static inline u32 log2plus1_u64_u32f8(u64 v) { -+ u32 msb = fls64(v); -+ s32 excess_bits = msb - 9; -+ u8 fractional = (0 <= excess_bits)? v >> excess_bits: v << -excess_bits; -+ return msb << 8 | fractional; -+} -+ -+static inline u32 calc_burst_penalty(u64 burst_time) { -+ u32 greed, tolerance, penalty, scaled_penalty; -+ -+ greed = log2plus1_u64_u32f8(burst_time); -+ tolerance = sched_burst_penalty_offset << 8; -+ penalty = max(0, (s32)greed - (s32)tolerance); -+ scaled_penalty = penalty * sched_burst_penalty_scale >> 16; -+ -+ return min(MAX_BURST_PENALTY, scaled_penalty); -+} -+ -+static inline u64 scale_slice(u64 delta, struct sched_entity *se) { -+ return mul_u64_u32_shr(delta, sched_prio_to_wmult[se->burst_score], 22); -+} -+ -+static void update_burst_score(struct sched_entity *se) { -+ if (!entity_is_task(se)) return; -+ struct task_struct *p = task_of(se); -+ u8 prio = p->static_prio - MAX_RT_PRIO; -+ u8 prev_prio = min(39, prio + se->burst_score); -+ -+ se->burst_score = se->burst_penalty >> 2; -+ -+ u8 new_prio = min(39, prio + se->burst_score); -+ if (new_prio != prev_prio) -+ reweight_task(p, new_prio); -+} -+ -+static void update_burst_penalty(struct sched_entity *se) { -+ se->curr_burst_penalty = calc_burst_penalty(se->burst_time); -+ se->burst_penalty = max(se->prev_burst_penalty, se->curr_burst_penalty); -+ update_burst_score(se); -+} -+ -+static inline u32 binary_smooth(u32 new, u32 old) { -+ int increment = new - old; -+ return (0 <= increment)? -+ old + ( increment >> (int)sched_burst_smoothness_long): -+ old - (-increment >> (int)sched_burst_smoothness_short); -+} -+ -+static void restart_burst(struct sched_entity *se) { -+ se->burst_penalty = se->prev_burst_penalty = -+ binary_smooth(se->curr_burst_penalty, se->prev_burst_penalty); -+ se->curr_burst_penalty = 0; -+ se->burst_time = 0; -+ update_burst_score(se); -+} -+#endif // CONFIG_SCHED_BORE -+ - int sched_thermal_decay_shift; - static int __init setup_sched_thermal_decay_shift(char *str) - { -@@ -645,7 +716,6 @@ static inline u64 calc_delta_fair(u64 delta, struct sched_entity *se) - { - if (unlikely(se->load.weight != NICE_0_LOAD)) - delta = __calc_delta(delta, NICE_0_LOAD, &se->load); -- - return delta; - } - -@@ -848,7 +918,13 @@ static void update_curr(struct cfs_rq *cfs_rq) - curr->sum_exec_runtime += delta_exec; - schedstat_add(cfs_rq->exec_clock, delta_exec); - -+#ifdef CONFIG_SCHED_BORE -+ curr->burst_time += delta_exec; -+ update_burst_penalty(curr); -+ curr->vruntime += max(1ULL, calc_delta_fair(delta_exec, curr)); -+#else // !CONFIG_SCHED_BORE - curr->vruntime += calc_delta_fair(delta_exec, curr); -+#endif // CONFIG_SCHED_BORE - update_min_vruntime(cfs_rq); - - if (entity_is_task(curr)) { -@@ -5907,6 +5983,14 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags) - bool was_sched_idle = sched_idle_rq(rq); - - util_est_dequeue(&rq->cfs, p); -+#ifdef CONFIG_SCHED_BORE -+ if (task_sleep) { -+ cfs_rq = cfs_rq_of(se); -+ if (cfs_rq->curr == se) -+ update_curr(cfs_rq); -+ restart_burst(se); -+ } -+#endif // CONFIG_SCHED_BORE - - for_each_sched_entity(se) { - cfs_rq = cfs_rq_of(se); -@@ -7660,24 +7744,31 @@ 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 - -- if (curr->policy != SCHED_BATCH) { -- update_rq_clock(rq); -- /* -- * Update run-time statistics of the 'current'. -- */ -- update_curr(cfs_rq); -- /* -- * Tell update_rq_clock() that we've just updated, -- * so we don't do microscopic update in schedule() -- * and double the fastpath cost. -- */ -- rq_clock_skip_update(rq); -- } -+ update_rq_clock(rq); -+ /* -+ * Update run-time statistics of the 'current'. -+ */ -+ update_curr(cfs_rq); -+#ifdef CONFIG_SCHED_BORE -+ restart_burst(se); -+ 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() -+ * and double the fastpath cost. -+ */ -+ rq_clock_skip_update(rq); - - set_skip_buddy(se); - } -@@ -11486,6 +11577,9 @@ static void task_fork_fair(struct task_struct *p) - update_curr(cfs_rq); - se->vruntime = curr->vruntime; - } -+#ifdef CONFIG_SCHED_BORE -+ update_burst_score(se); -+#endif // CONFIG_SCHED_BORE - place_entity(cfs_rq, se, 1); - - if (sysctl_sched_child_runs_first && curr && entity_before(curr, se)) { -diff --git a/kernel/sysctl.c b/kernel/sysctl.c -index 928798f89c..27d197c737 100644 ---- a/kernel/sysctl.c -+++ b/kernel/sysctl.c -@@ -133,6 +133,19 @@ static int minolduid; - static int ngroups_max = NGROUPS_MAX; - static const int cap_last_cap = CAP_LAST_CAP; - -+#ifdef CONFIG_SCHED_BORE -+extern u8 sched_bore; -+extern u8 sched_burst_smoothness_long; -+extern u8 sched_burst_smoothness_short; -+extern u8 sched_burst_fork_atavistic; -+extern u8 sched_burst_penalty_offset; -+extern uint sched_burst_penalty_scale; -+extern uint sched_burst_cache_lifetime; -+static int __maybe_unused three = 3; -+static int __maybe_unused sixty_four = 64; -+static int __maybe_unused maxval_12_bits = 4095; -+#endif // CONFIG_SCHED_BORE -+ - /* - * This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs - * and hung_task_check_interval_secs -@@ -1775,6 +1788,69 @@ int proc_do_static_key(struct ctl_table *table, int write, - } - - static struct ctl_table kern_table[] = { -+#ifdef CONFIG_SCHED_BORE -+ { -+ .procname = "sched_bore", -+ .data = &sched_bore, -+ .maxlen = sizeof(u8), -+ .mode = 0644, -+ .proc_handler = proc_dou8vec_minmax, -+ .extra1 = SYSCTL_ONE, -+ .extra2 = SYSCTL_ONE, -+ }, -+ { -+ .procname = "sched_burst_smoothness_long", -+ .data = &sched_burst_smoothness_long, -+ .maxlen = sizeof(u8), -+ .mode = 0644, -+ .proc_handler = proc_dou8vec_minmax, -+ .extra1 = SYSCTL_ZERO, -+ .extra2 = SYSCTL_ONE, -+ }, -+ { -+ .procname = "sched_burst_smoothness_short", -+ .data = &sched_burst_smoothness_short, -+ .maxlen = sizeof(u8), -+ .mode = 0644, -+ .proc_handler = proc_dou8vec_minmax, -+ .extra1 = SYSCTL_ZERO, -+ .extra2 = SYSCTL_ONE, -+ }, -+ { -+ .procname = "sched_burst_fork_atavistic", -+ .data = &sched_burst_fork_atavistic, -+ .maxlen = sizeof(u8), -+ .mode = 0644, -+ .proc_handler = proc_dou8vec_minmax, -+ .extra1 = SYSCTL_ZERO, -+ .extra2 = &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 = &sixty_four, -+ }, -+ { -+ .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, -+ }, -+#endif // CONFIG_SCHED_BORE - { - .procname = "sched_child_runs_first", - .data = &sysctl_sched_child_runs_first, --- -2.34.1 - |