On Fri, Dec 7, 2012 at 7:18 AM, Rajiv Nishtala <nishtala....@gmail.com> wrote: > Hi List, > > model name : Intel(R) Core(TM) i7 CPU Q 720 @ 1.60GHz > 45 nm - Clarksfield. > > I am trying to collect some traces using perfmon with Python 2.7 > The events which I am trying to capture are : > 'INSTRUCTIONS_RETIRED','L2_LINES_IN','LLC_MISSES' > > > Collection of the events is completely unpredictable. However, If I run the > same thread twice, without killing the previous instance of it. I am able to > collect. > > Is it a problem with perfmon not supporting Clarksfield? That can't be the > case because, I am able to collect it at-times and it does not throw any > error. > > Please let me know if any of you had this issue and how you solved it. > Can you try using something simpler than the python bindings to measure your program. You can try using the perf_examples/task program for instance. The alternative is to use the perf tool and passing the event codes in hexadecimal.
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