OrgApache/incubator-nuttx
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incubator-nuttx
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csection: We can save execution time by removing judgments. 

test:
We can use qemu for testing.

compiling
make distclean -j20; ./tools/configure.sh -l qemu-armv8a:nsh_smp ;make -j20
running
qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic -machine virt,virtualization=on,gic-version=3 -net none -chardev stdio,id=con,mux=on -serial chardev:con -mon chardev=con,mode=readline -kernel ./nuttx

or
compiling
make distclean -j20; ./tools/configure.sh -l sabre-6quad:smp ;make -j20
running
qemu-system-arm  -semihosting -M sabrelite -m 1024 -smp 4 -kernel nuttx/nuttx -nographic

Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit is contained in:
hujun5 2024-05-08 19:56:22 +08:00 committed by Xiang Xiao
parent ace5dde1a9
commit 9a36b8b823
1 changed files with 246 additions and 262 deletions
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22
sched/irq/irq_csection.c
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@ -188,12 +188,6 @@ irqstate_t enter_critical_section(void)
try_again:
ret = up_irq_save();
/* Verify that the system has sufficiently initialized so that the task
* lists are valid.
*/
if (nxsched_get_initstate() >= OSINIT_TASKLISTS)
{
/* If called from an interrupt handler, then just take the spinlock.
* If we are already in a critical section, this will lock the CPU
* in the interrupt handler. Sounds worse than it is.
@ -395,7 +389,6 @@ try_again_in_irq:
#endif
}
}
}
/* Return interrupt status */
@ -412,11 +405,9 @@ irqstate_t enter_critical_section(void)
ret = up_irq_save();
/* Check if we were called from an interrupt handler and that the task
* lists have been initialized.
*/
/* Check if we were called from an interrupt handler */
if (!up_interrupt_context() && nxsched_get_initstate() >= OSINIT_TASKLISTS)
if (!up_interrupt_context())
{
FAR struct tcb_s *rtcb = this_task();
DEBUGASSERT(rtcb != NULL);
@ -459,12 +450,6 @@ void leave_critical_section(irqstate_t flags)
{
int cpu;
/* Verify that the system has sufficiently initialized so that the task
* lists are valid.
*/
if (nxsched_get_initstate() >= OSINIT_TASKLISTS)
{
/* If called from an interrupt handler, then just release the
* spinlock. The interrupt handling logic should already hold the
* spinlock if enter_critical_section() has been called. Unlocking
@ -562,7 +547,6 @@ void leave_critical_section(irqstate_t flags)
/* Have all CPUs released the lock? */
}
}
}
/* Restore the previous interrupt state which may still be interrupts
* disabled (but we don't have a mechanism to verify that now)
@ -579,7 +563,7 @@ void leave_critical_section(irqstate_t flags)
* lists have been initialized.
*/
if (!up_interrupt_context() && nxsched_get_initstate() >= OSINIT_TASKLISTS)
if (!up_interrupt_context())
{
FAR struct tcb_s *rtcb = this_task();
DEBUGASSERT(rtcb != NULL);