How to measure the RAM read/write performance
From: anish singh <hidden>
Date: 2013-02-27 12:07:52
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kernelnewbies
On Tue, Feb 26, 2013 at 5:01 PM, sandeep kumar [off-list ref] wrote:
Hi All In performance benchmark tools, When we profile read/write timings mostly, those read/writes are done to cache only. I want to measure my DDR(RAM chip) performance. So i want to make sure, every read/write should happen to DDR RAM chip only.
Try below points: 1. I am not sure about snapdragon(is it Qualcomm?) but try CONFIG_CPU_DCACHE_DISABLE. 2. You are better off programming some DMA master to do large (and uncached) reads/writes to RAM and timing that. However simple uncached LDR/STR from the CPU may not be a great measure of RAM controller perf. You should always add arm mailing list and please mention the chip set details. cat /proc/cpuinfo is a great way
How can i achieve this...Any ideas/suggestions...? -- With regards, Sandeep Kumar Anantapalli, _______________________________________________ Kernelnewbies mailing list Kernelnewbies at kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies