Cache view in CCSv4 for OMAP3530

Angelo Joseph

Expert 1240 points

Is there a way to view Data and Program cache hits on the Cortex Core from within CCSv4?

over 16 years ago

0 JohnS over 16 years ago

TI__Guru**** 163045 points

Angelo,

My only thought was to try to capture this via ETB but I was unable to get that working. I will try to get someone else to comment on if that is feasible.

John

0 Steve2181 over 16 years ago in reply to JohnS

TI__Expert 4995 points

To get cache performance on A series, you need to use the A-series performance monitoring unit. You can read about it here: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0388f/BEHGGDJC.html

0 Angelo Joseph over 16 years ago in reply to Steve2181

Expert 1240 points

More than overall cache performance statistics I was looking for a means to see which addresses are currently cached in the data and instruction caches. But I will see if the same can be obtained from the PMU.

0 Steve2181 over 16 years ago in reply to Angelo Joseph

TI__Expert 4995 points

I doubt that this is available from PMU, but I could be mistaken. Some c6x CPU such as 6455 have similar ability. PMU is designed for statistics at a more macro level.

Another way to get such information would be to do cycle accurate instruction trace and look at timestamps to find addresses where it stalls out for program or data. From looking at the large stalls, you can get the addresses and then spend time to figure out whether it is program or data stall. If you do this, ETB would probably not be enough information, and you would likely need an external trace receiver with a very large buffer such as Lauterbach Trace 32. This also assumes you have the appropriate connector on the card.

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Cache view in CCSv4 for OMAP3530