how to open and test the cache on the S32K144

[hicensezhang]

Hello,

  I want to open the cache and test the cache on the S32K144, could you help it?

[Robin_Shen]

Hi hicense,

You can enable the Cache in SystemInit().

You can find some information in "3.3.1. CACHE" and "3.3.2. Speculative Flash reads" of AN12972 Optimizing the S32K1xx eDMA for Performance Demanding Applications.

Best Regards,
Robin
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[hicensezhang]

ok ,thank you

I open the cache as you describe,

I understand opening the cache can reduce the cpu access the memory and enhance the performance , I want to verify the performance between opening the cache and close the cache, can you have the way to verify the performance improved?

[Robin_Shen]

Performance gains vary for different programs. You can use Systick or DWT (Data Watchpoint and Trace) measure the performance enhance.

refer: Measure the running time of one function on S32K