How to measure program execution time in ARM Cortex-A8 processor?

Accessing the performance counters isn’t difficult, but you have to enable them from kernel-mode. By default the counters are disabled. In a nutshell you have to execute the following two lines inside the kernel. Either as a loadable module or just adding the two lines somewhere in the board-init will do: /* enable user-mode access … Read more

Python speed testing – Time Difference – milliseconds

datetime.timedelta is just the difference between two datetimes … so it’s like a period of time, in days / seconds / microseconds >>> import datetime >>> a = datetime.datetime.now() >>> b = datetime.datetime.now() >>> c = b – a >>> c datetime.timedelta(0, 4, 316543) >>> c.days 0 >>> c.seconds 4 >>> c.microseconds 316543 Be aware … Read more

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