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performance counter
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Doug Price
over 7 years ago
Note: This was originally posted on 11th February 2013 at http://forums.arm.com
I'm porting an application to an ARM® Cortex-A9 based system running Ubuntu 12.04 and I need a way to query a performance counter. On Windows we used the function QueryPerformanceCounter() and on Intel-based Linux we used assembly code w/ the rdtsc command. Is there a similar command or some assembly language that I can use to achieve this capability on an ARM system?
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Martin Weidmann
over 7 years ago
Note: This was originally posted on 12th February 2013 at
http://forums.arm.com
There are a couple of different APIs. You could try oprofile (
http://oprofile.sourceforge.net/
) or perf (
https://perf.wiki.kernel.org/index.php/Main_Page
).
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Doug Price
over 7 years ago
Note: This was originally posted on 12th February 2013 at
http://forums.arm.com
Great. Thanks.
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Peter Harris
over 7 years ago
Note: This was originally posted on 12th February 2013 at
http://forums.arm.com
Also generally worth noting that Linux tends to have higher resolution in its normal time APIs than windows, so many of the uses of QPC on Windows can just use gettimeoffday, which can return up to us resolution if available.
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