From: Avi Kivity <avi@redhat.com>
To: "joro@8bytes.org" <joro@8bytes.org>
Cc: Alexander Graf <agraf@suse.de>,
Joerg Roedel <joerg.roedel@amd.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"anthony@codemonkey.ws" <anthony@codemonkey.ws>
Subject: Re: [PATCH 7/9] Add VMRUN handler v3
Date: Sat, 27 Sep 2008 15:59:03 +0300 [thread overview]
Message-ID: <48DE2E17.4040602@redhat.com> (raw)
In-Reply-To: <20080925212242.GM27426@8bytes.org>
joro@8bytes.org wrote:
> Copying data in memory is always expensive because the accesses may miss
> in the caches and data must be fetched from memory. As far as I know
> this can be around 150 cycles per cache line.
>
When the copy is sequential, the processor will prefetch the data ahead
of time, so you don't get the full hit.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2008-09-27 12:59 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-17 13:41 [PATCH 0/9] Add support for nested SVM (kernel) v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 1/9] Add CPUID feature flag for SVM v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 2/9] Clean up VINTR setting v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 3/9] Add helper functions for nested SVM v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 4/9] Implement GIF, clgi and stgi v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 5/9] Implement hsave v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 6/9] Add VMLOAD and VMSAVE handlers v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 7/9] Add VMRUN handler v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 8/9] Add VMEXIT handler and intercepts v3 Alexander Graf
2008-09-17 13:41 ` [PATCH 9/9] Allow setting the SVME bit v3 Alexander Graf
2008-09-19 15:59 ` [PATCH 7/9] Add VMRUN handler v3 Joerg Roedel
2008-09-25 17:32 ` Alexander Graf
2008-09-25 17:37 ` Joerg Roedel
2008-09-25 20:00 ` Alexander Graf
2008-09-25 21:22 ` joro
2008-09-27 12:59 ` Avi Kivity [this message]
2008-09-27 12:58 ` Avi Kivity
2008-09-25 18:47 ` [PATCH 4/9] Implement GIF, clgi and stgi v3 Joerg Roedel
2008-09-25 19:55 ` Alexander Graf
2008-09-25 21:27 ` Joerg Roedel
2008-09-26 9:01 ` Alexander Graf
2008-09-27 12:55 ` Avi Kivity
2008-09-27 12:52 ` Avi Kivity
2008-09-19 14:36 ` [PATCH 0/9] Add support for nested SVM (kernel) v3 Joerg Roedel
2008-09-19 14:39 ` Joerg Roedel
2008-09-19 15:56 ` Joerg Roedel
2008-10-15 17:07 ` Alexander Graf
2008-09-19 21:48 ` First performance numbers Joerg Roedel
2008-09-20 1:30 ` Avi Kivity
2008-09-20 6:55 ` Joerg Roedel
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