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POWant to make /proc/*/smaps output anonymous region sum and /proc/meminfo AnonPages to match to trace actual memory usage precisely
 

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  1. POWant to make /proc/*/smaps output anonymous region sum and /proc/meminfo AnonPages to match to trace actual memory usage precisely
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    <p>I want to see the precise amount of memory each processes use as anonymous page, because anonymous memory cannot be paged out, thus tracking this usage precisely is important.</p> <p>One way to get the whole sum of anonymous page is to read /proc/meminfo AnonPages.</p> <p>The other way is to add up all the entries in smaps file which matches follows:</p> <ul> <li>no name</li> <li>[stack]</li> <li>[heap]</li> <li>/dev/zero</li> <li>/dev/shm/...</li> <li><strong>Relocated section private_dirty</strong> <blockquote> <p>Section used for relocation would be updated for each process, which makes some private_dirty region in a named mapping region. Elf loader seems to change read/write attribute using mprotect when doing relocation, so it is difficult to differentiate such region from a data section, and making it difficult to track these usage from each process point of view</li> </ul> <p>So I would like to know how to differentiate the above relocated section, and to precisely track the anonymous memory usage for each processes.</p> </blockquote></p> <p>Maybe we should add new entry in /proc/*/smaps to show the amount of Anonymous memory for each section.</p> <p>And I've found this diff which was done 2010 October, which just answer my question.</p> <p><a href="http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=blobdiff;f=Documentation/filesystems/proc.txt;h=976de6e19dd821351c1e4b52f82c72139c9598d7;hp=a563b74c7aef400ccfcd8e5e0a10cd03b94523f1;hb=b40d4f84becd69275451baee7f0801c85eb58437;hpb=d16e15f5b029fc7d03540ba0e5fb23b0abb0ebe0" rel="nofollow">http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=blobdiff;f=Documentation/filesystems/proc.txt;h=976de6e19dd821351c1e4b52f82c72139c9598d7;hp=a563b74c7aef400ccfcd8e5e0a10cd03b94523f1;hb=b40d4f84becd69275451baee7f0801c85eb58437;hpb=d16e15f5b029fc7d03540ba0e5fb23b0abb0ebe0</a></p> <p><a href="http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=blobdiff;f=fs/proc/task_mmu.c;h=da6b01d70f019506face0dae73f0b78c3200d299;hp=871e25ed006970667229eea95c56342836c53525;hb=b40d4f84becd69275451baee7f0801c85eb58437;hpb=d16e15f5b029fc7d03540ba0e5fb23b0abb0ebe0" rel="nofollow">http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=blobdiff;f=fs/proc/task_mmu.c;h=da6b01d70f019506face0dae73f0b78c3200d299;hp=871e25ed006970667229eea95c56342836c53525;hb=b40d4f84becd69275451baee7f0801c85eb58437;hpb=d16e15f5b029fc7d03540ba0e5fb23b0abb0ebe0</a></p>
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