Strace not showing all system calls

[Frits Hoogland]

Hello list, I hope you can help me with an observation I've made with strace on Oracle Linux 6.3 (latest) X64.
When I strace a process, I only see successful io_getevents() calls, not non-successful io_getevents() calls with a timeout set to 0s.
Is that expected behaviour? (I can imagine a sort of overflow protection for non-successful system calls which have a very short timeout, which resembles polling mechanisms)

I am looking forward to an answer!

Frits Hoogland

http://fritshoogland.wordpress.com
frits.hoogland at gmail.com
+31 6 53569942

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