How to measure the RAM read/write performance
From: Gaurav Jain <hidden>
Date: 2013-02-26 12:06:41
The mechanism to disable the L1/L2 memory caches of the CPU will depend on the processor architecture itself. This can be possibly be done at kernel boot-time or more preferably, in your case, through a kernel module. For Intel x86, the kernel module would look something like following: (The key is setting bit 30 of the control register cr0) mov eax,cr0 or eax, 40000000H ;set bit 30 without clearing the others mov cr0,eax Reference: http://stackoverflow.com/questions/1108485/disable-l2-l1-caches http://dirac.org/linux/writing/lkmpg/2.6/lkmpg-2.6.0.html ~ Gaurav On Tue, Feb 26, 2013 at 12:31 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. 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
-- Gaurav Jain Associate Software Engineer VxVM Escalations Team, SAMG Symantec Software India Pvt. Ltd. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20130226/393ac4b9/attachment.html