From: Anthony Liguori <anthony@codemonkey.ws>
To: "Yang, Sheng" <sheng.yang@intel.com>
Cc: kvm-devel@lists.sourceforge.net
Subject: Re: [PATCH 0/6] In kernel PIT patch
Date: Tue, 04 Mar 2008 09:52:24 -0600 [thread overview]
Message-ID: <47CD7038.6000200@codemonkey.ws> (raw)
In-Reply-To: <200803041822.40285.sheng.yang@intel.com>
Yang, Sheng wrote:
> Hi
>
> Here is the last in-kernel PIT patch for KVM. The mainly change from last
> version is the supporting to save/restore. I also tested live migration.
>
> The other modifies including some date structure changed to be better for
> supporting the save/restore. I moved the PIT timer to outside of channel
> structure, which explicitly means only one channel (channel 0) would trigger
> it.
>
> After fix TSC problem on SMP PAE RHEL5/5.1 guest, now the patch works well
> without any modify of kernel parameter.
>
How are you measuring the improvements from an in-kernel PIT? From your
mails, you're claiming it increases the timer accuracy. How are you
measuring it and how much does it improve it?
Do you expect an overall performance improvement from this or is it
simply about improving timer accuracy?
Regards,
Anthony Liguori
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next prev parent reply other threads:[~2008-03-04 15:52 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-04 10:22 [PATCH 0/6] In kernel PIT patch Yang, Sheng
2008-03-04 15:52 ` Anthony Liguori [this message]
2008-03-04 23:18 ` Dor Laor
2008-03-05 0:50 ` Anthony Liguori
2008-03-05 3:41 ` Yang, Sheng
2008-03-05 4:25 ` Anthony Liguori
2008-03-05 5:18 ` Yang, Sheng
2008-03-05 10:14 ` Dor Laor
2008-03-05 14:58 ` Anthony Liguori
2008-03-05 17:30 ` Avi Kivity
2008-03-05 22:40 ` Dor Laor
2008-03-05 23:05 ` Anthony Liguori
2008-03-05 23:24 ` Dor Laor
2008-03-06 20:56 ` Anthony Liguori
2008-03-06 21:17 ` Dor Laor
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