When one process sends a signal to another process, does receiving process wait until it is rescheduled to run? So if every 1 ms we choose one process to run, does that mean the latency from generating the signal to delivery of the signal is around 0.5 ms? (Suppose we only have two processes.)
And more generally, how are signals implemented in Linux?
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This is (somewhat) undefined. If the receiving process is set up to take action upon receipt of the signal (that is, the signal is not ignored or blocked, then the process becomes runnable. If it has sufficient priority, then it is also scheduled immediately, but that is not guaranteed. |
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