An introduction to Clear Containers

Posted May 21, 2015 11:57 UTC (Thu) by pbonzini (subscriber, #60935)
In reply to: An introduction to Clear Containers by krakensden
Parent article: An introduction to Clear Containers

FWIW, QEMU is just bloated in the default configuration. With a custom firmware (here) and by disabling options at build time (./configure --disable-foo), I can boot Linux in 80 ms. The memory usage is still not great (44 MB), but then I have done absolutely zero effort to cut it down.

An introduction to Clear Containers

Posted May 21, 2015 12:51 UTC (Thu) by arjan (subscriber, #36785) [Link] (1 responses)

this includes the startup time of qemu itself? not too bad, about 20 msec over for now though...

An introduction to Clear Containers

Posted May 21, 2015 13:18 UTC (Thu) by pbonzini (subscriber, #60935) [Link]

Yes, that includes the startup time of QEMU (and I should not take timings on a laptop, because now I'm getting 50 ms). Time is mostly spent in glibc, except for a single function that costs 25% and that can be easily brought down to 10%... i.e. 40 ms. :)

I got it with "time", modifying the firmware to exit QEMU 10 or so instructions before the jump to vmlinuz.

And it can do migration too, of course. :) What is the expected lifetime of these containers?