James Harris 6543e06914 kernel: sched: avoid unnecessary lock in z_impl_k_yield ...

`z_impl_k_yield` unlocked sched_spinlock, only to lock it again
immediately, do a little bit more work, then unlock it again.
This causes performance issues on SMP, where `sched_spinlock`
is often fairly highly contended and cores often end up spinning
for quite a while waiting to retake the lock in `z_swap_unlocked`.

Instead directly pass the spinlock key to `z_swap` and avoid the
extra lock+unlock.

Signed-off-by: James Harris <james.harris@intel.com>

2021-03-02 14:35:21 -05:00

..

include

kernel: sched: change to 3-way thread priority comparison

2021-03-02 14:27:14 -05:00

atomic_c.c

kernel: Add k_heap synchronized memory allocator

2020-04-14 10:05:55 -07:00

banner.c

kernel: init: move banner handling

2020-11-27 20:08:14 -05:00

cache_handlers.c

cache: Expand the APIs for cache flushing

2021-01-19 14:31:02 -05:00

CMakeLists.txt

kernel: Remove abort and join implementation (UNBISECTABLE)

2021-02-24 16:39:15 -05:00

compiler_stack_protect.c

tests: coverage: exclude the CODE UNREACHABLE of code coverage

2021-01-15 12:42:00 -05:00

condvar.c

kernel: add vrfy hooks to support userspace with condvar

2021-01-19 08:55:47 -05:00

device.c

device: store device pm busy status in the state structure

2021-02-19 10:11:20 -05:00

errno.c

kernel: support using thread local storage for errno

2020-10-24 10:52:00 -07:00

fatal.c

debug: coredump: remove z_ prefix for stuff used outside subsys

2021-01-21 22:08:59 -05:00

futex.c

kernel/timeout: Make timeout arguments an opaque type

2020-03-31 19:40:47 -04:00

idle.c

kernel: Remove abort and join implementation (UNBISECTABLE)

2021-02-24 16:39:15 -05:00

init.c

device: perform dynamic device initialization during system startup

2021-02-19 10:11:20 -05:00

Kconfig

kernel: Decouple TICKS_PER_SEC from TICKLESS_CAPABLE

2021-02-04 12:34:23 -05:00

kheap.c

kernel: add k_heap_aligned_alloc

2020-12-08 13:21:26 -05:00

mailbox.c

kernel: Remove legacy mem_pool usage

2020-12-07 21:50:14 -05:00

mem_domain.c

tests: coverage: exclude the CODE UNREACHABLE of code coverage

2021-01-15 12:42:00 -05:00

mem_slab.c

kernel: mem_slab: Optimize mem_slab_free

2020-12-07 11:36:48 +01:00

mempool.c

z_heap_aligned_alloc(): avoid memory wastage

2021-01-22 10:04:43 -05:00

mmu.c

kernel: mmu: Fix trivial typos

2021-02-04 14:00:36 -05:00

msg_q.c

doc: Clarify semantics of k_msgq_put

2020-09-23 13:21:07 -05:00

mutex.c

kernel: Cleanup logger setup in kernel files

2020-11-27 09:56:34 -05:00

pipes.c

kernel: Remove legacy mem_pool usage

2020-12-07 21:50:14 -05:00

poll.c

kernel: sched: change to 3-way thread priority comparison

2021-03-02 14:27:14 -05:00

queue.c

kernel/queue: fix queue append/get race

2020-10-28 17:01:41 +01:00

sched.c

kernel: sched: avoid unnecessary lock in z_impl_k_yield

2021-03-02 14:35:21 -05:00

sem.c

device: Const-ify all device driver instance pointers

2020-09-02 13:48:13 +02:00

smp.c

tests: coverage: exclude the CODE UNREACHABLE of code coverage

2021-01-15 12:42:00 -05:00

stack.c

kernel: stack: fix stack_push spinlock and return

2020-10-07 17:10:36 -04:00

system_work_q.c

device: Const-ify all device driver instance pointers

2020-09-02 13:48:13 +02:00

thread.c

kernel: Add new k_thread_abort()/k_thread_join()

2021-02-24 16:39:15 -05:00

timeout.c

kernel/timeout: Correctly clamp z_clock_set_timeout() argument

2021-02-24 16:39:15 -05:00

timer.c

kernel: const-qualify objects used to calculate delay values

2021-01-22 08:05:26 -06:00

userspace_handler.c

userspace: update k_object API to support immutable objects

2020-09-02 13:48:13 +02:00

userspace.c

kernel: userspace: aligned memory allocation for dynamic objects

2021-01-13 09:43:55 -08:00

version.c

zephyr: replace zephyr integer types with C99 types

2020-06-08 08:23:57 -05:00

work_q.c

kernel: Remove CONFIG_LEGACY_TIMEOUT_API

2021-01-14 21:33:16 -05:00

xip.c

linker: arm: Add cortex_m itcm section

2021-01-15 14:51:20 +01:00