Hello qemu developers,
I've been unable to find information about date and time in qemu. Two
questions the simpler one:
Can I set the date and time of the system clock at start of the
emulation (or in the manager console)? I've seen a patch [1], but that
doesn't seem to be included in my build (from debian sid):
Now the more complex one: I would like to do 'relative benchmarks', i.e.
comparing one product to another. I don't mind very much how fast my
machines are, but I want them to be equally fast, even if I use two,
three or ten of those on my machine.
Therefore I would like to limit CPU time. Say limiting it to virtually 1
MHz. Optionally one could even take into account processor caches...
As some of the benchmarks I would like to run are harddrive dependant,
could one limit their speed? Try simulating harddisk head positions and
rotation?
Limiting the network speed can be done quite accurately with Linux on
tap devices I don't know about latency, though.
All in all: I would like to simulate a system which is exactly (or quite
close to) a 100 times slower than a given real one.
Has anybody tried (or requested) something like that already? How
difficult would it be to teach qemu to 'slow down'? How accurate could
such a slow down be?
Regards
Markus
[1]: http://lists.gnu.org/archive/html/qemu-devel/2006-01/msg00128.html
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