What is the state of the processor, when a process is
waiting for some event to occur?
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Answer / ramu
They have asked the state of processor, so.. should it be
blocked/pending or it should be running?? as there is a
possiblity that processor may be executing other processes
right??
| Is This Answer Correct ? | 5 Yes | 6 No |
Answer / santosh
Processor may be executing other task(high priority) or in
Idle state or in power saving mode in case device is
operating from battery.
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / tejas gawade
processor will enter in "idle loop" in which "sleep"
instruction will be executed to move processor to sleeping
i.e. power saving mode.
In this state processor can accept interrupts and come out
of sleeping state.
So actually processor "do nothing" in this situation.
| Is This Answer Correct ? | 3 Yes | 7 No |
I have been working on one thread which manage and control a couple of circular buffers. It has api for other thread to access. As the thread grows bigger and bigger, I split it as 3 to 4 threads which need to share common buffers, and also their api could be used by other threads, (not these three threads). Inside api, I also allow other threads to access these three threads' common buffers(more than one buffer). SO I have to use mutex to avoid race condition . But I found mutex will be everwhere in all the threads when they update the common buffer. I am wondering whether I could reduce mutex usage(more mutex will hure my system performance). any ideas for how to reduce mutex usage meanwhile to avoid race condition. Thanks
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