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hvmemul_do_pio
2012 Oct 20
15
xen-unstable, winxp32 very poor performance on AMD FX-8150, I bisected and changeset is 24770:7f79475d3de7
I ran a bisect to find out when Windows XP 32 bit becomes unusably slow.
And I found the changeset that caused it.
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The problem:
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Windows 8 64 bit and 32 bit run fast and fine in the newest xen versions.
Windows XP 32 bit runs unusably slow in anything new that I built from
xen-unstable, but runs fast in 4.1.2 and 4.1.3 stable. While it is
running slow, "xm top" or