Messages in this thread |  | | | Date | Fri, 16 Apr 1999 23:54:08 -0700 | | From | David Miller <> | | Subject | Re: bad lmbench numbers for mmap |
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From: torvalds@transmeta.com (Linus Torvalds) Date: 17 Apr 1999 06:28:46 GMT
I don't see that this problem should be anything new. Have we ever been any good at lat_mmap? I don't think so..
It may be that in a previous version of lat_mmap it did only read taps, but Larry for one reason or another changed those into writes.
Does anyone have any of the older lmbench beta's around? Say from about 8 to 12 months ago or so? This would help me check my sanity.
I do agree that doing writes is probably not making the benchmark report what the name would indicate. However I do see that a version that does writes is useful (think of a linker implementation that mmap's the final object file it creates, or some mmap'd database of some sort). But such a benchmark should have a different name (lat_mmapwrite, or somesuch).
Later, David S. Miller davem@redhat.com
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