I am wondering if there is somewhere a list of all the system and library calls that may cause the calling thread to be suspended (putted in a wait queue) ?
Note: man pages are not always explicit about this, see for example man 2 read
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Manuel Selva
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Any syscall or libc call can get interrupted and the calling process can be moved to wait queue for several reasons: time slice expired, resources (I/O) being unavailable. If you are more interested in what is causing the process to be moved into the wait queue, it best to look into the scheduling aspects of the process. – askb Aug 28 '14 at 10:05
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Thanks for the comment. I am working under ROUND_ROBIN real time priority and my question mainly concerns I/O not available. – Manuel Selva Aug 28 '14 at 10:22
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What syscalls are you getting stuck on ? Have you checked the strace output, iostat, sar reports for any error codes, bottle necks ? – askb Aug 28 '14 at 11:18