[PATCH] D25766: [ELF] - Implemented --section-ordering-file option.

[George Rimar via llvm-commits]

> Correction. I talked about this with Sriraman offline. He said that a mechanism to reorder sections is useful to reduce TLB misses because we could layout hot > functions close to each other. It doesn't have to be --section-ordering-file, but it seems that we need some mechanism to reorder sections even on all-SSD systems.


So my suggestions are next then:

1) We can also implement sorting of .text.unlikely.* .text.exit.* .text.startup.* .text.hot.* sections. That is how bfd/gold do.
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=gold/layout.cc;h=d14f27bddfcf48d1465e60cf0f6889c85ce5bb05;hb=HEAD#l1111
This feature is independent from --section-ordering-file generally.

2) Anyways we are still interested in some numbers, so I going to benchmark Firefox or Chromium to see them (just in case - I have both SSDs and HDD for testing).

George.



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