[LLVMdev] [cfe-dev] RFC: Upcoming Build System Changes

[Joerg Sonnenberger]

On Tue, Nov 01, 2011 at 06:27:35PM -0500, David A. Greene wrote:
> Here is actual data comparing an empty LLVM build done recursively (the
> LLVM build) and non-recursively (the Cray build).
> 
> See this?
> 
> 0inputs+0outputs (0major+671804minor)pagefaults 0swaps
> 
> vs. this?
> 
> 0inputs+0outputs (0major+184605minor)pagefaults 0swaps
> 
> That's I/O.

Sorry to disappoint you, but no, this isn't I/O. You have just shown
that a LLVM build touches more mmap'd pages.

Joerg