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Yes, the busy waiting solution using the turn variable can work on a shared-memory multiprocessor with two CPUs, as long as the CPUs can read and write to the shared turn variable correctly. However, this solution may lead to inefficiencies due to busy waiting, where one CPU continuously checks the turn variable while the other CPU is executing its critical section. This can waste CPU cycles and lead to performance degradation. Additionally, proper memory synchronization mechanisms are essential to prevent issues like cache coherence and ensure that changes to the turn variable are visible to both CPUs.

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7mo ago

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