On Tue, Jan 03, 2012 at 12:21:10AM -0800, Garrett Cooper wrote: > The file is 3.0GB in size. Look at all those page faults though! > Thanks! > -Garrett
From usr.bin/cmp/c_regular.c:
#define MMAP_CHUNK (8*1024*1024)
...
for (..) {
mmap() chunk of size MMAP_CHUNK.
compare
munmap()k
}
That 8 MB chunk size sounds like a bad plan to me. I can imagine
something needed to be done to compare files larger than X GB on a 32bit
system, but 8MB is pretty small...
Marc
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