Messages in this thread | | | Subject | Re: SMP/cc Cluster description | Date | Thu, 06 Dec 2001 23:40:09 -0500 | From | Jeff Dike <> |
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akeys@post.cis.smu.edu said: > it seemed to me that you could easily simulate what you want with > lots of UML's talking to each other. I think you would need to create > some kind of device that uses a file or a shared memory segment as > the cluster's memory.
Yeah, there is already support for mapping in a random file and using that as UML memory, so that would be used for the cluster interconnect for any cluster emulations you wanted to run with UML.
> Actually, I think that (shared memory) is how > Jeff had intended on implementing SMP in UML anyway.
No, at least not any shared memory that's not already there. UML uses a host process for each UML process, and UML kernel data and text are shared between all these host processes. SMP just means having more than one host process runnable at a time. Each runnable process on the host is a virtual processor.
> At this point I > don't think UML supports SMP though I know of at least one person who > was attempting it.
It doesn't yet. Someone is (or was), but I haven't heard a peep from him in at least a month. So this is starting to look like another little project which got quickly going but just as quickly abandoned.
Jeff
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