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Modify a c prog about a virtual memory manager ... (Budget $20-$100, Required Skills: C C, Programming)- how to get physical memory address from virtual memory address
Hi , I am using Linux 2.4.20 Kernel. I am runing an application which will malloc and returns a virtual memory address. I need to get the physical memory address for that virtual memory address. How can I get that? Thanks in advance, -Hari- Apparatus and method for turning of pages in a digitised virtual document
An apparatus and a method for displaying a digitised document to an audience. A memory (20) is provided for storing of at least one digitised document in a computer readable file format, wherein a processing unit (10) is adapted to retrieve documents and process it into a near-identical document replica....- Re: how to get physical memory address from virtual memory address
What?? This is entirely incorrect. EVERY valid virtual address has an associated physical address. In the case of malloc-ed memory, that physical address will be in physical memory. Addressing the OP, while you are in user mode, the physical address can change at any time. The only reliable way to get the physical address is- Your system is low on virtual memory
Summary: the Total paging file size for all drives is set to 384 ... Sometimes I get an error with a title "Windows - Virtual Memory Minimum ... tried to search this file on my computer with "Search System Folders" ...- Re: how to get physical memory address from virtual memory address
This is not a task that should be performed by the user-level process. You can't for example test the memory which is permanently mapped by kernel (which user-level process is not allowed to access). For memory diagnostics, tools specifically crafted for such tasks should be used (such as memtest86).- Re: how to get physical memory address from virtual memory address
Of course, you are wrong. Virtual addresses /only/ have corresponding physical addresses when they are used in a memory reference. Pure "allocation" (malloc()) doesn't result in a memory reference, so no real address is assigned. (FWIW, this is why the OOM killer works the way it does - it kills processes that have allocated memory- Re: how to get physical memory address from virtual memory address
Hari wrote: Get it for what purpose? As it is process virtual memory, the physical address may change at any time due to paging activity!
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