How to measure execution time from the host?

[dmarquez]

Hello,
I found on the epiphany sdk functions to obtain the performance counters of the epiphany. But this information is not enough to identify the total execution time of a task. I would like to get the time on the host.
I read that it is possible to do it using the performance counters on the ARM. Is there any easy way to do this? An example would be extremely helpful.

Thanks in advance.
David.

[sebraa]

Run your host program through "time", then you get the real (wall-clock) execution time, as well as your host program's CPU time for kernel space and user space. Since the ARM cores running Linux are not a real-time system, whatever you measure is only approximate.

You can also use the common linux functions to measure real time with high granularity (gettimeofday() and friends).

[dmarquez]

Hi, The problem is I would like to measure small parts of a program (near the time of execution of a function call itself).
On Intel, I usually use the instruction RDTSC.
I heard that there are a similar instruction on ARM, but It is not so easy to use.
Here is an example on A8: http://stackoverflow.com/questions/3247 ... -processor
Maybe someone here used something like that on parallella platform?
Thanks!
David