Hi,

There is no specific information on reasoning behind the design developments of CoreSight trace available. However, you will note that the transition from ETMv3.x -> PTM 1.x -> ETM 4.x represents an improvement in the compression of trace - i.e. the amount of trace used per instruction executed, plus developments in the protocols to allow integration with the latest ARM architectures.

Regards

Mike

On 3 April 2017 at 17:07, Muhammad Abdul WAHAB muhammadabdul.wahab@centralesupelec.fr wrote:

Hi,

I was wondering the reasons ARM decided to move towards PTM source component instead of ETM component. What is the main reason that pushed towards this change ?

Thanks for your reply.

Best regards, MAW

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