如题,在四核的Arm Cortex-A9中如何测量Core对共享内存访问的开销?最大和最小开销是多少?这里开销具体是指什么?
需要考虑L1 L2 Cache么?最大开销是不是访问主存(不经过Cache)?最小开销是不是从L1 Cache读写?这里需不需要考虑数据量大小?比如对某块内存memset()写一定大小的数据 几K的。。。其最大和最小开销如何测量?
如题,在四核的Arm Cortex-A9中如何测量Core对共享内存访问的开销?最大和最小开销是多少?这里开销具体是指什么?
需要考虑L1 L2 Cache么?最大开销是不是访问主存(不经过Cache)?最小开销是不是从L1 Cache读写?这里需不需要考虑数据量大小?比如对某块内存memset()写一定大小的数据 几K的。。。其最大和最小开销如何测量?
Dear Experts,
I would like to disable the data prefetching engines of the L1 and L2 caches on a MediaTek-X20 board which includes a quad Cortex-A53 cluster and runs Android.
I have tried to include in the Linux kernel code (at kernel/init/main.c) a call…
A5.6.6 Memory Behavior
The Cortex-A55 core supports all the ARMv8 memory types.
However, the following behaviors are simplified and so for best performance their use is not recommended:
Write-Through
Memory that is marked as Write-Through cannot be cached…
Hi,
I'm trying to find out what level is the out-most level of inner shareable domain. Is there any register to get this information? I want to know what inner shareable domain is in A53 big-LITTLE architecture. I find some articles that telling L1 and…
How to handle below scenario ?
Hi All!
I am working with a Xilinx Zynq 7000 SoC which uses the Cortex A9 as a CPU.
I've observed a problem wherein a section of memory marked strongly-ordered and non-cacheable (0xc02) in the MMU table gets corrupted by what appears to be L1 evictions…
Does anyone know what means "Does not access L1 caches." note in the "Treatment of memory attributes" table from [1] for Normal/Non-shareable/Non-cacheable memory for Cortex-A5?
Thank you!
Good day all,
I'm working with a SOC with dual Cortex-R4 that comes with MPU.
Due to the SRAM limitation and other restrictions, I'm not using any embedded linux or any other SMP RTOS.
Currently I'm working on the optimization of the flow, so I'm…