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Re: Intel IOMMU (and IOMMU for Virtualization) performances

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From: Andi Kleen <andi@...>
To: FUJITA Tomonori <fujita.tomonori@...>
Cc: <linux-kernel@...>, <mgross@...>, <linux-scsi@...>
Subject: Re: Intel IOMMU (and IOMMU for Virtualization) performances
Date: Wednesday, June 4, 2008 - 12:56 pm

FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> writes:

I think using the bitmap is an excellent idea and your numbers look good. 
Do you have numbers on the memory consumption too?
Trading some memory for performance is ok for something as performance critical 
as the IOMMU. 

-Andi
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Messages in current thread:
Intel IOMMU (and IOMMU for Virtualization) performances, FUJITA Tomonori, (Wed Jun 4, 10:47 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, mark gross, (Thu Jun 5, 6:02 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, FUJITA Tomonori, (Fri Jun 6, 12:44 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, mark gross, (Mon Jun 23, 1:54 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Grant Grundler, (Wed Jun 4, 2:06 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Muli Ben-Yehuda, (Fri Jun 6, 4:21 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Grant Grundler, (Fri Jun 6, 5:28 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Muli Ben-Yehuda, (Fri Jun 6, 5:36 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Grant Grundler, (Fri Jun 6, 5:51 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Andi Kleen, (Mon Jun 9, 4:17 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, FUJITA Tomonori, (Mon Jun 9, 5:36 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Andi Kleen, (Mon Jun 9, 6:20 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, FUJITA Tomonori, (Thu Jun 5, 10:49 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Muli Ben-Yehuda, (Fri Jun 6, 4:23 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Grant Grundler, (Thu Jun 5, 2:34 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, James Bottomley, (Thu Jun 5, 3:01 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, FUJITA Tomonori, (Fri Jun 6, 12:44 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Grant Grundler, (Fri Jun 6, 1:48 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, FUJITA Tomonori, (Mon Jun 9, 5:36 am)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, Andi Kleen, (Wed Jun 4, 12:56 pm)
Re: Intel IOMMU (and IOMMU for Virtualization) performances, FUJITA Tomonori, (Thu Jun 5, 10:49 am)