sched/signal: There is no need to use sched_[un]lock #12283
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@hujun260 some ltp test case fail: https://github.com/apache/nuttx/actions/runs/8949322132/job/24583521866?pr=12283 |
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@hujun260 |
anchao
reviewed
May 6, 2024
purpose: 1 sched_lock is very time-consuming, and reducing its invocations can improve performance. 2 sched_lock is prone to misuse, and narrowing its scope of use is to prevent people from referencing incorrect code and using it 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 We have also tested this patch on other ARM hardware platforms. Signed-off-by: hujun5 <hujun5@xiaomi.com>
anchao
reviewed
May 7, 2024
| @@ -154,7 +153,6 @@ int sigsuspend(FAR const sigset_t *set) | |||
| nxsig_unmask_pendingsignal(); | |||
| } | |||
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| sched_unlock(); | |||
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ditto ，context switch on line 129
nuttx/sched/sched/sched_removereadytorun.c
Line 228 in 4ffad26
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purpose:
1 sched_lock is very time-consuming, and reducing its invocations can improve performance. 2 sched_lock is prone to misuse, and narrowing its scope of use is to prevent people from referencing incorrect code and using it
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
We have also tested this patch on other ARM hardware platforms.