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Re: [Qemu-devel] OS with only segmentation - will it be faster?


From: C K Kashyap
Subject: Re: [Qemu-devel] OS with only segmentation - will it be faster?
Date: Fri, 13 Aug 2010 11:00:14 +0530

Thanks Malc .. I'll check out the video ... and perhaps ping you off the list.


On Fri, Aug 13, 2010 at 10:15 AM, malc <address@hidden> wrote:
On Fri, 13 Aug 2010, C K Kashyap wrote:

> Hi,
> This is not strictly qemu related but I think people who have a good idea
> about it must be on this list.
> I was wondering if I had an app that requires a fixed quantity of memory -
> sufficiently less than the available physical memory. Would it benefit from
> getting rid of the paging mechanism in the OS/hardware?
> As in, since the number of tasks are also fixed - we'd use only segmentation
> to partition the VM area? Would eliminating the paging layer give good
> returns?
>

Microsoft researchers working on Singularity claimed[1] that it does
provide significant speed improvements, and recent (few days ago)
discussion on comp.arch suggested as much (no need to go though TLB).

[1] http://channel9.msdn.com/shows/Going+Deep/Singularity-A-research-OS-written-in-C/
   (maybe the claim was made in some other video, in any case it should
    be there on Channel 9)

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Regards,
Kashyap

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