hujun5 02efb15b57 ostest:fix signal test fail
If the same signal is quickly repeated multiple times, the signal may be ignored.
In SMP since we cannot control thread scheduling to ensure timely signal processing,
it is best to use semaphores to wait for signal processing to complete, which can also shorten the ostest time

Signed-off-by: hujun5 <hujun5@xiaomi.com>
2023-05-06 23:37:07 +03:00
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