:In my case I'd be better off with shared memory objects that aren't
:persistent but appear in the name space so that I don't accidentally
:start copying a virtual bus file when the programs exit improperly.
:In the sparse matrix calculations with no checkpointing or need to appear
:in a name space I'd think the best thing would be to use VM with the matrix
:initially mapped to a copy on write zero page. I guess you can't
:do that without mmap because of swap allocation.
:
:Peter
:
:--
:Peter Dufault ([EMAIL PROTECTED]) Realtime development, Machine control,
If you can fit the whole thing into a process's VM space, then you
can certainly use mmap(...MAP_ANON...) combined with madvise(... MADV_FREE)
to implement a sparse memory object.
There was talk a while ago about feeding MADV_FREE through to the
filesystem layer. I was under the impression that SUN does that, does
anyone know?
-Matt
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