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[Qemu-devel] Re: [PATCH 0/6] qemu-kvm: Introduce bit-based phys_ram_dirt

From: Avi Kivity
Subject: [Qemu-devel] Re: [PATCH 0/6] qemu-kvm: Introduce bit-based phys_ram_dirty, and bit-based dirty page checker.
Date: Tue, 16 Mar 2010 15:11:10 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3

On 03/16/2010 12:53 PM, Yoshiaki Tamura wrote:
Experimental results:
Cond1: 1.9 ~ 61 times speed up
Cond2: 1.9 ~ 56 times speed up
Cond3: 1.9 ~ 59 times speed up
Cond4: 1.7 ~ 59 times speed up

Impressive results.  What's the typical speedup?  Closer to 1.9 or 61?

Note the issue with the cache accesses for set_dirty() is only applicable to tcg, since kvm always updates the dirty bitmap in a batch (well, I/O also updates the bitmap).

error compiling committee.c: too many arguments to function

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