[MirageOS-devel] Domain creation/boot times and Xen toolstack

[Martin Lucina <martin@xxxxxxxxxx>]

Hi Anil,

in your talk at operatingsystems.io last week (great talk, thanks!), you
mentioned that you have Unikernels "booting in the time between SYN and
ACK" [1].

I'm curious; is this the "raw" boot time (first instruction to serving
requests) or a "full stack on Xen" boot time (domain creation to serving
requests)?

If it is the latter I presume you are using a custom Xen toolstack to
create the domain? My measurements with rump kernels show that the "xl"
toolstack is quite slow, depending on the exact Xen setup taking between 1
to 2.5 seconds to create a domain with a vif and a couple of disk devices.

Following discussion with Ian Jackson, this (xl) should be be fairly easy
to optimize, has/is anyone from Mirage OS looking at this?

Martin

[1] http://decks.openmirage.org/osio2014#/4/4

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