[GitHub] [incubator-nuttx] zhuyanlinzyl opened a new pull request #5335: arch:cache: flush/clean dcache all if size large than cache size

Tue, 25 Jan 2022 01:03:56 -0800 


zhuyanlinzyl opened a new pull request #5335:
URL: https://github.com/apache/incubator-nuttx/pull/5335


   ## Summary
   
   This RP contain two commits:
   
   1 arm/xtensa:cache: flush/clean dcache all if size large than cache size
   2 armv7-a/r:cache: implemention clean&flush_dcache_all
   
   ## Impact
   
   No.
   
   ## Testing
   
   We have a testing  on armv8-m  with 32K icache & 32k dcache,  when flush 
&clean  buffer  with size 1MB。
   
   `up_clean_dcache_all()  run 30 times faster than up_clean_dcache().`
   
   When use this patch, the times will be same.
   
   
   
   
   


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