Messages in this thread | | | Date | Tue, 29 Jul 2008 00:08:10 -0700 | From | Alessio Sangalli <> | Subject | Re: interrupt overhead on ARM architecture |
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Iwo Mergler wrote:
> In other words, you can't even measure the latency on a particular > system and then assume it will stay anywhere near constant. Comparing > different systems with the same processor core is hopeless.
Everything makes perfect sense. For this reason, I am willing to do some tests on my own platform. How would you suggest to proceed? I would need an extremely accurate way to measure time to begin with and then:
- read that time reference - generate an interrupt by placing some data in a device or so - reading again that time reference as first thing in the ISR - save the result
- do the above in various scenarios, with different drivers enabled, CPU load, etc etc
bye Alessio
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