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xen-devel
Re: [Xen-devel] [RFC][PATCH 12/13] Kemari: use signal to save qemu state
Christopher Head wrote:
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Yoshiaki Tamura wrote:
Thanks for measuring the numbers. It made things clear.
I think we need a signal-based interface as Ian said previously.
On our test environment, AMD Barcelona 2.3GHz, the total cpu cycles of
Kemari in userland when running I/O intensive applications is around
3000000.
Although Xen transferring code and QEMU saving code is processed
concurrently, using xenstored for staring QEMU portion would lower the
performance. Especially if the xenstored gets slower when items are
loaded.
Yoshi
For Remus, we ended up using a Unix-domain socket to handshake with QEMU
for suspend/resume, for the same reason (to improve performance compared
to Xenstore). Just another approach :) and also another approach that
won't work with stubdom.
Thanks for your info:)
It's good to know that we weren't the only who wanted this kind of interface.
Yoshi
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