On 02/13/05 03:21:29, David Schultz wrote:[...] With a little bit of work, you should be able to replace src/lib/libc/stdlib/malloc.c. ptmalloc is much more heavyweight, but it would probably do better in cases where you have a large number of threads doing a massive number of malloc/free operations on a multiprocessor system. Other than that, I don't know enough details about ptmalloc to speculate, except to say that for most real-world workloads on modern systems, the impact of the malloc implementation is likely to be negligible. Of course, test results would be interesting...
I see what you mean by heavy weight! Looking through the sources. The gains looked promising in this thread
http://docs.freebsd.org/cgi/mid.cgi?420BB1FF.11156.68F6CEC
I might find the time for it, and if I do I hope it is not too difficult.
Just from memory, doesn't Linux' malloc require kernel support for re-mapping memory regions, which is not available in FreeBSD? This issue came up in the discussion about FreeBSD's anemic realloc performance. Or has this kernel functionality been added to recent versions of FreeBSD?
You may want to investigate this before you invest too much time into your porting effort.
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