From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: KVM list <kvm@vger.kernel.org>, Joerg Roedel <joerg.roedel@amd.com>
Subject: Re: [PATCH 0/6] Add rudimentary Hyper-V guest support
Date: Mon, 18 May 2009 00:08:49 +0300 [thread overview]
Message-ID: <4A107CE1.2030707@redhat.com> (raw)
In-Reply-To: <0EF5ED01-F027-470C-B766-3DB8EF616AE8@suse.de>
Alexander Graf wrote:
> In order to find out why things were slow with nested SVM I hacked
> intercept reporting into debugfs in my local tree and found pretty
> interesting results (using NPT):
>
>
[...]
> So apparently the most intercepts come from the SVM helper calls
> (clgi, stgi, vmload, vmsave). I guess I need to get back to the
> "emulate when GIF=0" approach to get things fast.
There's only a limited potential here (a factor of three, reducing 6
exits to 2, less the emulation overhead). There's a lot more to be
gained from nested npt, since you'll avoid most of the original exits in
the first place.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next prev parent reply other threads:[~2009-05-17 21:08 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-15 8:22 [PATCH 0/6] Add rudimentary Hyper-V guest support Alexander Graf
2009-05-15 8:22 ` [PATCH 1/6] Add definition for IGNNE MSR Alexander Graf
2009-05-15 8:22 ` [PATCH 2/6] MMU: don't bail on PAT bits in PTE Alexander Graf
2009-05-15 8:22 ` [PATCH 3/6] Emulator: Inject #PF when page was not found Alexander Graf
2009-05-15 8:22 ` [PATCH 4/6] Implement Hyper-V MSRs Alexander Graf
2009-05-15 8:22 ` [PATCH 5/6] Nested SVM: Implement INVLPGA Alexander Graf
2009-05-15 8:22 ` [PATCH 6/6] Nested SVM: Improve interrupt injection Alexander Graf
2009-05-17 6:48 ` Gleb Natapov
2009-05-17 8:10 ` Alexander Graf
2009-05-18 11:47 ` Alexander Graf
2009-05-15 13:43 ` [PATCH 5/6] Nested SVM: Implement INVLPGA Joerg Roedel
2009-05-17 20:02 ` Avi Kivity
2009-05-17 20:03 ` Avi Kivity
2009-05-18 18:46 ` Marcelo Tosatti
2009-05-18 13:00 ` Alexander Graf
2009-05-17 9:54 ` [PATCH 4/6] Implement Hyper-V MSRs Avi Kivity
2009-05-17 19:57 ` Alexander Graf
2009-05-17 20:00 ` Avi Kivity
2009-05-17 20:27 ` Alexander Graf
2009-05-17 20:37 ` Alexander Graf
2009-05-15 13:40 ` [PATCH 3/6] Emulator: Inject #PF when page was not found Joerg Roedel
2009-05-17 19:59 ` Avi Kivity
2009-05-17 20:25 ` Alexander Graf
2009-05-17 20:58 ` Avi Kivity
2009-05-18 12:55 ` Alexander Graf
2009-05-15 10:25 ` [PATCH 2/6] MMU: don't bail on PAT bits in PTE Michael S. Tsirkin
2009-05-15 10:53 ` Alexander Graf
2009-05-15 13:19 ` Joerg Roedel
2009-05-17 9:51 ` Avi Kivity
2009-05-15 10:47 ` [PATCH 0/6] Add rudimentary Hyper-V guest support Alexander Graf
2009-05-17 21:08 ` Avi Kivity [this message]
2009-05-18 12:45 ` Alexander Graf
2009-05-18 13:29 ` Avi Kivity
2009-05-18 13:35 ` Alexander Graf
2009-05-18 13:44 ` Avi Kivity
2009-05-18 15:15 ` Alexander Graf
2009-05-18 15:20 ` Avi Kivity
2009-05-18 15:24 ` Alexander Graf
2009-05-18 15:28 ` Avi Kivity
2009-05-18 15:32 ` Alexander Graf
2009-05-18 15:35 ` Avi Kivity
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4A107CE1.2030707@redhat.com \
--to=avi@redhat.com \
--cc=agraf@suse.de \
--cc=joerg.roedel@amd.com \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.