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zephyr/kernel
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Andy Ross 20611f13ca sched: Optimize dummy thread usage on SMP 
Nicolas Pitre points out that since these thread structs are just
dummies for the context swtiching, they can be presumed to be "write
only" and thus there's no point in having one per CPU, everyone can
share the same one.

The only gotcha is that we never really documented (nor really have a
place to document) that rule, so it's not theoretically impossible for
an architecture to read back what it might have written underneath
arch_switch().  Leave this in a separate commit for bisection
purposes, but the risk seems very low.

Signed-off-by: Andy Ross <andyross@google.com>
2024-04-25 15:12:02 +02:00
..
include sched: Optimize dummy thread usage on SMP 2024-04-25 15:12:02 +02:00
paging kernel: mm: only include demand_paging.h if needed 2023-11-23 10:01:45 +01:00
atomic_c.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
banner.c kernel: banner: use BUILD_VERSION only if not empty 2024-04-04 23:47:33 +02:00
busy_wait.c kernel: Use k_us_to_cyc_ceil32 in k_busy_wait 2023-12-05 09:24:28 +01:00
CMakeLists.txt kernel: move nothread support to own file 2024-04-06 14:22:08 +03:00
compiler_stack_protect.c kernel: canaries: Allow using TLS to store it 2023-08-08 19:08:04 -04:00
condvar.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
cpu_mask.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
device.c syscall: rename Z_OOPS -> K_OOPS 2023-11-03 11:46:52 +01:00
dynamic.c kernel: align kernel stack size declaration 2024-03-27 19:27:10 -04:00
dynamic_disabled.c kernel: dynamic: declare dynamic stubs when disabled 2023-07-24 12:59:43 -04:00
errno.c kernel: move syscall_handler.h to internal include directory 2023-11-03 11:46:52 +01:00
events.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
fatal.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
float.c kernel: move float operations out of thread.c 2024-03-06 19:27:28 -05:00
futex.c syscall: rename Z_SYSCALL_ to K_SYSCALL_ 2023-11-03 11:46:52 +01:00
idle.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
init.c sched: Optimize dummy thread usage on SMP 2024-04-25 15:12:02 +02:00
ipi.c kernel: rename sliceable -> thread_is_sliceable 2024-04-01 18:47:36 -04:00
irq_offload.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
Kconfig kernel: increase main stack size for ztest on ARC 2024-04-24 10:49:05 +02:00
Kconfig.device kernel: reorg Kconfigs and split them 2024-03-06 19:27:28 -05:00
Kconfig.obj_core kernel: reorg Kconfigs and split them 2024-03-06 19:27:28 -05:00
Kconfig.smp kernel: reorg Kconfigs and split them 2024-03-06 19:27:28 -05:00
Kconfig.vm mm: introduce CONFIG_KERNEL_VM_USE_CUSTOM_MEM_RANGE_CHECK 2023-10-20 15:08:34 +02:00
kheap.c kernel: rename h -> heap 2024-03-06 19:27:28 -05:00
mailbox.c kernel: Clean up mailbox async msg configuration 2024-04-09 11:05:55 +02:00
main_weak.c kernel: Switch main return type from void to int 2023-04-14 07:49:41 +09:00
mem_domain.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
mem_slab.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
mempool.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
mmu.c kernel: mm: introduce k_mem_phys_map()/_unmap() 2024-04-10 07:44:27 -04:00
msg_q.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
mutex.c kernel: move thread related helper function kthread.h 2024-04-01 18:47:36 -04:00
nothread.c kernel: move nothread support to own file 2024-04-06 14:22:08 +03:00
obj_core.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
pipes.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
poll.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
priority_queues.c kernel: priority queues: declare as static inlines 2024-04-22 16:40:11 -04:00
queue.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
sched.c sched: Optimize dummy thread usage on SMP 2024-04-25 15:12:02 +02:00
sem.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
smp.c sched: Optimize dummy thread usage on SMP 2024-04-25 15:12:02 +02:00
spinlock_validate.c kernel/spinlock: Fix SPIN_VALIDATE in ISRs 2024-04-25 15:12:02 +02:00
stack.c kernel: stack: Check possible overflow 2024-04-22 15:20:39 -04:00
system_work_q.c init: remove the need for a dummy device pointer in SYS_INIT functions 2023-04-12 14:28:07 +00:00
thread.c kernel: add the ability to memory map thread stacks 2024-04-10 07:44:27 -04:00
thread_monitor.c kernel: split thread monitor 2024-03-06 19:27:28 -05:00
timeout.c kernel: timeout: Optimize setting next alarm 2024-04-09 13:55:07 -04:00
timer.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
timeslicing.c kernel: thread: rename is_preempt 2024-04-01 18:47:36 -04:00
usage.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
userspace.c kernel: align thread stack size declaration 2024-03-27 19:27:10 -04:00
userspace_handler.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
version.c zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
work.c kernel: add closing comments to config endifs 2024-03-25 18:03:31 -04:00
xip.c kernel: canaries: Allow using TLS to store it 2023-08-08 19:08:04 -04:00