[Xen-devel] inaccurate dirty_count from XEN_DOMCTL_SHADOW_OP

[Olaf Hering <olaf@xxxxxxxxx>]

To measure how many dirty pages a domU creates within a timeframe the
attached tool was created, based on code from xc_domain_save.
Once the domU touches many pages the reported dirty rate is high, but
after a few seconds the rate drops down from thousands to just a few dozen.

I wonder if the usage of xc_shadow_control is correct. The testing was
done with a xen-4.4 based dom0, I will verify with staging once I find
the time.


Olaf

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