Thanks for the heads up Paul.
On Thu, Jun 27, 2013 at 1:40 PM, Paul Durrant <paul.durr...@citrix.com>wrote: > Hi,**** > > ** ** > > XENUTIL is actually part of the XS legacy PV drivers (which are only > used for XP and 2K3, OS that will both go EOL pretty soon). These are very > much in maintenance-only mode and because of that, and other issues, we > have not released the source. The actively developed and maintained PV > drivers (for Vista onwards) can be found on github. The balloon code is > part of the xenbus driver and you can find it at > https://github.com/xenserver/win-xenbus/blob/master/src/xenbus/balloon.c** > ** > > ** > I was using Windows 2008 guests with older XS tools. I've updated the XS tools to latest and now I see there is no BalloonWorkerThread. Yet I see many calls such as XENBUS|__BalloonAllocatePfnArray: 8185 page(s) at 8185000 pages/s XENBUS|__BalloonDecreaseReservation: 8185 page(s) at 545666 pages/s XENBUS|__BalloonReleasePfnArray: 8185 page(s) at 545666 pages/s and finally a XENBUS|BalloonInflate: <==== 3932160 page(s) in 22308ms Another Balloon test showed XENBUS|BalloonInflate: <==== 8021300 page(s) in 258322ms So is above Inflation time spent only on releasing pages without cleaning them ? Or is there any other task which has to be done before releasing pages ? My experimental goal is to improve the boot time in case of DMC on windows 2008. > ** > > As for memory cleaning, you’ll find that this is not done. __ > BalloonAllocatePagesForMdl() makes use of MmAllocatePagesForMdlEx() which > has a MM_DONT_ZERO_ALLOCATION option to avoid touching pages that are > allocated. This is done to avoid needlessly faulting in populate-on-demand > pages which will be immediately handed back to Xen.**** > > ** ** > > Paul**** > > ** ** > > *From:* xen-api-boun...@lists.xen.org [mailto: > xen-api-boun...@lists.xen.org] *On Behalf Of *Rushikesh Jadhav > *Sent:* 26 June 2013 22:39 > *To:* xen-api@lists.xen.org > *Subject:* [Xen-API] Windows Balloon Driver**** > > ** ** > > Hi List,**** > > ** ** > > I tried to find windows balloon driver code on github but somehow not able > to locate it. I'm particularly interested in optimizing XENUTIL: > BalloonWorkerThread.**** > > ** ** > > What I want to achieve is to disable the memory cleaning process while the > balloon is inflated in guest. The ballooning code is quite slow in case of > windows but very fast (I think no cleaning is done) for Linux PV guests.** > ** > > ** ** > > Any ideas or help to get me started ?**** > > ** ** > > Thanks.**** > > ** ** > > XS rocks !!**** >
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