topic Re: Displaying CPC Content in T-Series

Displaying CPC Content

burakorcun_ozka — Tue, 04 Feb 2020 14:12:01 GMT

Hello everybody,

I'm working on CCF (corenet coherency fabric) and CPC (corenet platform cache, or L3 cache) in T1042D4RDB. I studied how CCF works and uses CPC for performance about RAM I/O operations. At this point, i need to display CPC content when data is written to RAM, because i want to test Write-Back and Write-Through policies, also want to know about what happened when the cache is disabled, invalidated and flushed.

Is there any way to display CPC content?

Thanks in advanced.

Re: Displaying CPC Content

alexander_yakov — Thu, 06 Feb 2020 21:03:15 GMT

There is no way to read the contents of CPC, when this device is configured as L3 cache. CPC device may be configured as SRAM, in this case you can read its contents just as common RAM, but when the device is configured in L3 cache mode, this is not possible. To understand the difference between Write-Back anf Write-Through, I recommend using an indirect method - by measuring write times in various write modes (linear write, random write with step higher than cache line size, and etc).

Re: Displaying CPC Content

burakorcun_ozka — Sat, 08 Feb 2020 20:20:18 GMT

Thank you Alexander. I will try the methods for CPC.