On 08/13/2012 09:08 AM, Juan Quintela wrote: >> >> Should we have some sort of stat for the number of pages that are sent >> more than once, and/or for the maximum count of times that a given page >> was sent? Having hot/cold page analysis might make it easier to decide >> in the future which pages to avoid sending until the very end, and >> knowing how many pages are sent multiple times as well as the maximum >> times any one page is sent might help. > > That is not trivial to do without "duplicating" the bitmap. Bitmap is > already quite big on machines with huge memory. Adding a field to show > how many times a page have been sent sounds too much. Furthermore, how > could this information could be used externally.
No big loss, then. I was just wondering out loud, and don't really have a particular need for this information. I guess with XBZRLE, you _do_ have a count of how many cache hits you had, which is somewhat related (a cache hit implies sending a page more than once). -- Eric Blake ebl...@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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