Re: [Xen-users] 32bit or 64bit dom0?

[Grant McWilliams <grantmasterflash@xxxxxxxxx>]

> Â Â Â-- Pasi
>
> Â ÂThat depends one whether you consider (up to) 20% worth considering! I'd
> Â Âbe willing to change for 5%.
>

> Â Â[3]http://www.phoronix.com/scan.php?page=article&item=616&num=1
>

Hmm.. did you paste wrong url? That url only has 32b vs. 64b?

Here's 32b vs. 32b PAE benchmark:
http://www.phoronix.com/scan.php?page=article&item=ubuntu_32_pae

Although that benchmark must have something wrong with the 32 vs 64 numbers..
the different can't be THAT big.

"In the fourteen tests for this article we did not find using Ubuntu's 32-bit PAE kernel
to have a dramatic performance impact whether it be positive or negative.

Granted, we were using just 4GB of system memory that is common to many desktops,
but if using 8GB, 16GB, or even a greater memory capacity the performance
penalties are perhaps higher. "

-- Pasi

Yes I did! Thanks. Here try this.

http://www.phoronix.com/scan.php?page=article&item=ubuntu_32_pae&num=1

Grant McWilliams

I either posted two quick or too late! So the quote was saying that PAE didn't have an impact over a stock 32 bit kernel
but if you compare it to the 64 bit kernel there's a serious hit. In the tests they did the 64 bit kernel was faster by quite a bit

in every way. I've blindly been using 64 bit kernels wherever possible but this helps me know that I've benefited from it.

Grant McWilliams



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