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Re: QEMU Automated Testing (was [Qemu-devel] qemu Makefile.target vl.h h
Re: QEMU Automated Testing (was [Qemu-devel] qemu Makefile.target vl.h hw/acpi.c hw/adlib.c ...)
Fri, 27 Jul 2007 12:55:08 -0500
Thunderbird 188.8.131.52 (X11/20070604)
Paul Brook wrote:
As Qemu cannot use multicore CPUs (partially due to missing thread
safety), yet, you won't benefit from this unless you want to run
multiple instances of Qemu in parallel.
how close is thread safey?
In a useful form: a fair way off.
It's relatively simple to hack something together than runs. Making it work
correctly and go fast is much harder though. My current prototype (running on
2 cores) runs about a quarter the speed of normal qemu, and dies shortly
after booting because the guest atomic synchronisation primitives don't work
This later problem seems like the hardest to solve to me. Did you have
any ideas here that don't involve hand coding the translation for atomic
Either way, for a tinderbox or automated testing yo *do* have lots of
different tests you can run in parallel, so it doesn't matter that each qemu
instance only uses one core. We're only talking about small SMP here - maybe
16 cores, but not thousands.