Hi,
I am trying to reduce the memory foot print of shared objects.After
examine the layouts of many shared objects, I find out that the start
part of a shared object will be seldom needed.
So I add the following code to the runtime loader:
madvice(si->base, si->rel + si->rel_count * 8, MADV_DONTNEED);
And Find out the foot print drops proportionally dramatically.
An very big shared object(libwebcore.so), drops from 7MB to 4MB.
So I think it's a good idea to add this technique to the future
eglibc.
madvice tell *nix system to let go the page table and the page in
the specify range. But not the vma.
--
Lin Zuojian
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