Messages in this thread | | | Date | Sun, 27 Oct 2013 22:37:46 -0400 (EDT) | From | Vince Weaver <> | Subject | perf: PERF_EVENT_IOC_PERIOD on ARM vs everywhere else |
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Hello
it was pointed out to me that in the 3.7 kernel (more specifically, 3581fe0ef37ce12ac7a4f74831168352ae848edc ) a change was made in the ARM architecture to change how PERF_EVENT_IOC_PERIOD is handled.
Unlike other architectures, post-3.7 ARM updates the period right away rather than waiting until the next overflow.
I can't find any discussion as to why this change was made.
Should other architectures be updated to? I just wanted to find out the rationale for this before I update the manpage to reflect the difference in behaviors between architectures.
Vince
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