[fedora-virt] libguestfs tests running much slower

Richard W.M. Jones rjones at redhat.com
Thu Jul 2 14:17:10 UTC 2009

On Thu, Jul 02, 2009 at 02:38:33PM +0100, Richard W.M. Jones wrote:
> On Wed, Jul 01, 2009 at 06:23:14PM +0100, Matthew Booth wrote:
> > This is only subjective, and could yet be something entirely random on  
> > my machine. However, I just pulled changes  
> > 3d15f7e652340777514ff30c3cfc560a90b612ec..99e28249d52ca5495b636e14ae3e4387ee62c8fe 
> > and now 'make check' runs a *lot* slower. I'm guessing maybe 5-10 times  
> > slower. Is it just me?
> It turns out that two commands take a lot longer to run
> with a virtio backend than with an IDE backend.  They are:
> mkfs.ext2
> zerofree
> At the moment I have no idea why this is.
> I'm about to push some very simple command-level profiling
> into the daemon.

Dan pointed me to this bug which looks relevant:



Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://et.redhat.com/~rjones/libguestfs/
See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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