Jinming Zhao
22d76caba5
kernel: sched: optimize scheduling IPIs for idle CPU wakeups ...
Add CONFIG_IPI_OPTIMIZE_IDLE to avoid waking multiple idle CPUs for a
single runnable thread. Select one active, affinity-compatible idle CPU
and record which thread its outstanding scheduling opportunity covers.
Track coverage with a reserved CPU bitmap and a per-CPU target array.
Each idle CPU and runnable thread can have at most one reservation. The
mapping represents coverage rather than binding: any CPU may select any
eligible runnable thread.
When a reserved CPU selects a different thread, transfer the selected
thread's existing reservation to the original target when possible.
Otherwise, issue a replacement IPI for the still-runnable target. Clear
reservations when their target leaves the run queue.
Apply the same optimization to MetaIRQ wakeups. The MetaIRQ can preempt
its local waker while one idle CPU is notified to run the displaced
preemptible work.
Signed-off-by: Jinming Zhao <jinmzhao@qti.qualcomm.com>
2026-09-01 11:03:59 +01:00
kernel: sched: optimize scheduling IPIs for idle CPU wakeups
2026-09-01 11:03:59 +01:00
kernel: mm: rename z_num_pagefaults_get to k_mem_num_*
2024-06-12 21:13:26 -04:00
kernel: sched: optimize scheduling IPIs for idle CPU wakeups
2026-09-01 11:03:59 +01:00
kernel: thread_entry: fix include for TLS stack canaries
2026-08-19 18:41:05 -04:00
kernel: userspace: Add z_waitq_head_locked()
2026-08-21 16:17:54 +02:00
kernel: timer: Include include/zephyr/sys/clock.h
2026-07-30 07:45:05 -05:00
kernel: move the sleep API declarations to their own header
2026-08-20 08:52:31 +02:00
kernel: fix doxygen warnings exposed by adding kernel/ to docs INPUT
2026-07-01 17:05:28 -04:00
kernel: obj_core: register object types from a single init point
2026-07-01 23:45:35 -04:00
kernel: Update _sched_spinlock comment references
2026-08-21 16:17:54 +02:00
kernel: device: restrict the device_deinit syscall to driver objects
2026-08-10 09:14:56 -07:00
kernel: dynamic: fix kernel stack size overflow
2026-08-21 16:20:34 +02:00
kernel: dynamic: declare dynamic stubs when disabled
2023-07-24 12:59:43 -04:00
kernel: Update _sched_spinlock comment references
2026-08-21 16:17:54 +02:00
sys: printk: stop locking once a fatal error is being reported
2026-08-19 17:09:07 +01:00
build: namespace the generated headers with zephyr/
2024-05-28 22:03:55 +02:00
kernel: timeout: report the no-deadline case from the idle path
2026-08-12 19:27:28 -04:00
kernel: init: remove reference to legacy api
2026-08-26 18:14:02 -07:00
kernel: add closing comments to config endifs
2024-03-25 18:03:31 -04:00
kernel: add Pugh skip list timeout backend
2026-08-30 16:43:01 -04:00
kernel: Kconfig.device: fix CONFIG_DEVICE_DEINIT_SUPPORT help text
2026-03-08 16:36:39 +01:00
kernel: Kconfig: remove prompts from SoC and Board Hooks
2026-08-27 21:26:07 +01:00
kernel: remove duplicate config OBJ_CORE_SEM
2026-07-27 11:45:01 -07:00
kernel: mmu: remove LINKER_GENERIC_SECTIONS_PRESENT_AT_BOOT
2026-06-23 09:11:08 -04:00
kernel: kheap: keep static heap init as a PRE_KERNEL_1 SYS_INIT
2026-07-06 19:42:44 -04:00
kernel: Fix race in mbox_message_dispose()
2026-08-18 20:22:32 -04:00
kernel: Switch main return type from void to int
2023-04-14 07:49:41 +09:00
kernel: kheap, mem_slab, mailbox: use kernel init hooks
2026-07-06 15:10:55 -04:00
kernel: k_free() no longer calls z_waitq_head()
2026-08-21 16:17:54 +02:00
sys: sflist: make flag capacity ABI-dependent
2026-08-31 21:36:01 -04:00
kernel: userspace: Add z_waitq_head_locked()
2026-08-21 16:17:54 +02:00
kernel: userspace: Add z_waitq_head_locked()
2026-08-21 16:17:54 +02:00
tracing: give k_sleep_ticks() its own trace point
2026-08-20 08:52:31 +02:00
kernel: obj_core: name the walk callback parameters
2026-08-17 10:26:20 +02:00
kernel: rename the reserved 'exit' labels to 'out'
2026-08-11 17:08:24 -04:00
kernel: poll: Remove redundant timeout check
2026-08-02 11:43:59 -04:00
kernel: priority queues: declare as static inlines
2024-04-22 16:40:11 -04:00
sys: sflist: make flag capacity ABI-dependent
2026-08-31 21:36:01 -04:00
kernel: sched: optimize scheduling IPIs for idle CPU wakeups
2026-09-01 11:03:59 +01:00
kernel: Update _sched_spinlock comment references
2026-08-21 16:17:54 +02:00
kernel: add configurable striped semaphore locking
2026-08-27 22:11:20 -04:00
kernel: Add and use z_swap_locked()
2026-08-21 16:17:54 +02:00
kernel: spinlock: add z_assert_can_swap() for context-switch validation
2026-06-15 18:35:34 -04:00
kernel: stack: fix allocation size overflow
2026-08-22 19:20:09 -04:00
kernel: refactor sys_clock_hw_cycles_per_sec runtime support
2026-02-20 13:31:07 +01:00
kernel: system_work_q: register init via kernel init hook
2026-07-06 15:10:55 -04:00
kernel: Add and use z_reschedule_locked()
2026-08-21 16:17:54 +02:00
kernel: thread_monitor: reafactor and remove duplicate code
2025-04-04 07:42:20 +02:00
kernel: add Pugh skip list timeout backend
2026-08-30 16:43:01 -04:00
kernel: timeout: add bucketed delta-list backend
2026-07-09 18:02:12 -04:00
kernel: timeout: factor delta-list queue into a pluggable backend
2026-07-09 18:02:12 -04:00
kernel: timeout: add min-heap backend
2026-07-09 18:02:12 -04:00
kernel: add Pugh skip list timeout backend
2026-08-30 16:43:01 -04:00
kernel: timeout: add timer-wheel backend
2026-07-09 18:02:12 -04:00
kernel: userspace: Add z_waitq_head_locked()
2026-08-21 16:17:54 +02:00
kernel: Add private kernel header file kspinlock.h
2026-08-21 16:17:54 +02:00
kernel: usage: fix unused-variable warning when THREAD_USAGE_ALL=n
2026-08-19 17:12:24 +01:00
build: namespace the generated headers with zephyr/
2024-05-28 22:03:55 +02:00
toolchain: fix deprecation warning for iar
2026-08-12 13:11:27 -04:00
22d76caba5