From: Muli Ben-Yehuda <muli@il.ibm.com>
To: Arjan van de Ven <arjan@linux.intel.com>
Cc: Andi Kleen <ak@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
"Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com>,
linux-kernel@vger.kernel.org, gregkh@suse.de,
suresh.b.siddha@intel.com, ashok.raj@intel.com,
davem@davemloft.net, clameter@sgi.com
Subject: Re: [Intel IOMMU 00/10] Intel IOMMU support, take #2
Date: Tue, 26 Jun 2007 11:11:25 -0400 [thread overview]
Message-ID: <20070626151125.GD8274@rhun.ibm.com> (raw)
In-Reply-To: <46812ADF.3060609@linux.intel.com>
On Tue, Jun 26, 2007 at 08:03:59AM -0700, Arjan van de Ven wrote:
> Muli Ben-Yehuda wrote:
> >How much? we have numbers (to be presented at OLS later this week)
> >that show that on bare-metal an IOMMU can cost as much as 15%-30% more
> >CPU utilization for an IO intensive workload (netperf). It will be
> >interesting to see comparable numbers for VT-d.
>
> for VT-d it is a LOT less. I'll let anil give you his data :)
Looking forward to it. Note that this is on a large SMP machine with
Gigabit ethernet, with netperf TCP stream. Comparing numbers for other
benchmarks on other machines is ... less than useful, but the numbers
themeselves are interesting.
Cheers,
Muli
next prev parent reply other threads:[~2007-06-26 15:11 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-19 21:37 [Intel IOMMU 00/10] Intel IOMMU support, take #2 Keshavamurthy, Anil S
2007-06-19 21:37 ` [Intel IOMMU 01/10] DMAR detection and parsing logic Keshavamurthy, Anil S
2007-07-04 9:18 ` Peter Zijlstra
2007-07-04 10:04 ` Andrew Morton
2007-07-04 10:14 ` Peter Zijlstra
2007-06-19 21:37 ` [Intel IOMMU 02/10] PCI generic helper function Keshavamurthy, Anil S
2007-06-26 5:49 ` Andrew Morton
2007-06-26 14:44 ` Keshavamurthy, Anil S
2007-06-19 21:37 ` [Intel IOMMU 03/10] clflush_cache_range now takes size param Keshavamurthy, Anil S
2007-06-19 21:37 ` [Intel IOMMU 04/10] IOVA allocation and management routines Keshavamurthy, Anil S
2007-06-26 6:07 ` Andrew Morton
2007-06-26 16:16 ` Keshavamurthy, Anil S
2007-06-19 21:37 ` [Intel IOMMU 05/10] Intel IOMMU driver Keshavamurthy, Anil S
2007-06-19 23:32 ` Christoph Lameter
2007-06-19 23:50 ` Keshavamurthy, Anil S
2007-06-19 23:56 ` Christoph Lameter
2007-06-26 6:32 ` Andrew Morton
2007-06-26 16:29 ` Keshavamurthy, Anil S
2007-06-26 6:25 ` Andrew Morton
2007-06-26 16:33 ` Keshavamurthy, Anil S
2007-06-26 6:30 ` Andrew Morton
2007-06-19 21:37 ` [Intel IOMMU 06/10] Avoid memory allocation failures in dma map api calls Keshavamurthy, Anil S
2007-06-19 23:25 ` Christoph Lameter
2007-06-19 23:27 ` Arjan van de Ven
2007-06-19 23:34 ` Christoph Lameter
2007-06-20 0:02 ` Arjan van de Ven
2007-06-20 8:06 ` Peter Zijlstra
2007-06-20 13:03 ` Arjan van de Ven
2007-06-20 17:30 ` Siddha, Suresh B
2007-06-20 18:05 ` Peter Zijlstra
2007-06-20 19:14 ` Arjan van de Ven
2007-06-20 20:08 ` Peter Zijlstra
2007-06-20 23:03 ` Keshavamurthy, Anil S
2007-06-21 6:10 ` Peter Zijlstra
2007-06-21 6:11 ` Arjan van de Ven
2007-06-21 6:29 ` Peter Zijlstra
2007-06-21 6:37 ` Keshavamurthy, Anil S
2007-06-21 7:13 ` Peter Zijlstra
2007-06-21 19:51 ` Keshavamurthy, Anil S
2007-06-21 6:30 ` Keshavamurthy, Anil S
2007-06-26 5:34 ` Andrew Morton
2007-06-19 21:37 ` [Intel IOMMU 07/10] Intel iommu cmdline option - forcedac Keshavamurthy, Anil S
2007-06-19 21:37 ` [Intel IOMMU 08/10] DMAR fault handling support Keshavamurthy, Anil S
2007-06-19 21:37 ` [Intel IOMMU 09/10] Iommu Gfx workaround Keshavamurthy, Anil S
2007-06-19 21:37 ` [Intel IOMMU 10/10] Iommu floppy workaround Keshavamurthy, Anil S
2007-06-26 6:42 ` Andrew Morton
2007-06-26 10:37 ` Andi Kleen
2007-06-26 19:25 ` Keshavamurthy, Anil S
2007-06-26 16:26 ` Keshavamurthy, Anil S
2007-06-26 6:45 ` [Intel IOMMU 00/10] Intel IOMMU support, take #2 Andrew Morton
2007-06-26 7:12 ` Andi Kleen
2007-06-26 11:13 ` Muli Ben-Yehuda
2007-06-26 15:03 ` Arjan van de Ven
2007-06-26 15:11 ` Muli Ben-Yehuda [this message]
2007-06-26 15:48 ` Keshavamurthy, Anil S
2007-06-26 16:00 ` Muli Ben-Yehuda
2007-06-26 15:56 ` Andi Kleen
2007-06-26 15:09 ` Muli Ben-Yehuda
2007-06-26 15:36 ` Andi Kleen
2007-06-26 15:15 ` Arjan van de Ven
2007-06-26 15:33 ` Andi Kleen
2007-06-26 16:25 ` Arjan van de Ven
2007-06-26 17:31 ` Andi Kleen
2007-06-26 20:10 ` Jesse Barnes
2007-06-26 22:35 ` Andi Kleen
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