I've been examining the time taken to launch the libguestfs appliance[1]. One of the commands we run in our custom init is:
hwclock -u -s This takes 0.3 seconds, which is over 10% of the total launch time, and as far as I can tell it does nothing useful. It was added many years ago, and no one knows what it does. We can assume that we're running a modern Linux guest kernel, recent qemu, have virtio, kvm-clock etc. Is there any need to run this command? Rich. [1] http://libguestfs.org/guestfs-internals.1.html -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org
