Re: [Xenomai-help] Running Xenomai in a virtual machine

[Jan Kiszka <jan.kiszka@domain.hid>]

Gilles Chanteperdrix wrote:
> Jan Kiszka wrote:
>> Johan Visser wrote:
>>> VMware runs, but gives heavy CPU load ( about 38 % ) instead of 6-8 % on
>>> a real system.
>> That's expected if your CPU actually lacks hardware virtualization.
> 
> An idle guest used to consume almost nothing on a vmware host. Only
> MS-DOS needed a special TSR to have its idle mode not consume 100%. On
> the other hand, the last time I used vmware was 5 years ago...

I meant the scale is expected: If basically the same system runs with
some non-zero load on real hw, the load that this machine inside a
code-translating hypervisor like vmware causes to its host will be
noticeably larger. But even the idle load can be noteworthy if I/O
emulation causes a lot of host activities, even with HVM.

Jan

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