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Diffstat (limited to 'share/doc/papers/malloc/conclusion.ms')
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diff --git a/share/doc/papers/malloc/conclusion.ms b/share/doc/papers/malloc/conclusion.ms deleted file mode 100644 index 9cf91cfe85e..00000000000 --- a/share/doc/papers/malloc/conclusion.ms +++ /dev/null @@ -1,48 +0,0 @@ -.\" -.\" ---------------------------------------------------------------------------- -.\" "THE BEER-WARE LICENSE" (Revision 42): -.\" <phk@login.dknet.dk> wrote this file. As long as you retain this notice you -.\" can do whatever you want with this stuff. If we meet some day, and you think -.\" this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp -.\" ---------------------------------------------------------------------------- -.\" -.\" $OpenBSD: conclusion.ms,v 1.2 1997/01/05 22:18:07 tholo Exp $ -.\" -.ds RH Conclusion and experience. -.NH -Conclusion and experience. -.PP -In general the performance differences between gnumalloc and this -malloc are not that big. -The major difference comes when primary storage is seriously -over-committed, in which case gnumalloc -wastes time paging in pages it's not going to use. -In such cases as much as a factor of five in wall-clock time has -been seen in difference. -Apart from that gnumalloc and this implementation are pretty -much head-on performance wise. -.PP -Several legacy programs in the BSD 4.4 Lite distribution had -code that depended on the memory returned from malloc to -be zeroed, in a couple of cases free(3) was called more than -once for the same allocation and a few cases even called free(3) -with pointers to objects in the data section or on the stack. -.PP -A couple of users have reported that using this malloc on other -platforms yielded "pretty impressive results", but no hard benchmarks -have been made. -.ds RH Acknowledgements & references. -.NH -Acknowledgements & references. -.PP -The first implementation of this algorithm was actually a file system, -done in assembler using 5-hole ``Baudot'' paper tape for a drum storage -device attached to a 20 bit germanium transistor computer with 2000 words -of memory, but that was many years ago. -.PP -Peter Wemm <peter@FreeBSD.org> came up with the idea to store the -page-directory in mmap(2)'ed memory instead of in the heap. -This has proven to be a good move. -.PP -Lars Fredriksen <fredriks@mcs.com> found and identified a -fence-post bug in the code. |