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SubjectRe: vmware strange scheduling priority
On Mon, Jun 16, 2003 at 08:39:38PM +0200, Peter Enderborg wrote:
> Im playing with vmware 4.0 workstation. And it do some strange
> things.
> I start vmware with nice and I got this:
> 26499 pme 19 19 95980 93M 95020 R N 12 32.6 24.8 8:55
> vmware-vmx
> 26439 pme 19 19 8416 8008 7692 R N 8 3.2 2.0 2:02
> vmware-vmx
> 26492 pme 6 -10 95980 93M 95020 R < 12 2.6 24.8 0:34
> vmware-vmx
> 26409 pme 19 19 4900 3916 2484 S N 0 1.0 1.0 0:29
> vmware
> 26433 pme 5 -10 8416 8008 7692 S < 8 0.5 2.0 0:29
> vmware-vmx
> 26493 pme 5 -10 8056 7268 6988 S < 0 0.5 1.8 0:20
> vmware-mks
> 26495 pme 9 0 67672 65M 66888 S 0 0.2 17.4 0:11
> vmware-vmx
>
>
> It have changed the prioority to -10 for some of its own tasks. How
> can that be done? Its a non suid binary started
> by a normal user. It's very ugly, but Im more intressted in how it
> can be done.
> The kernel is a 2.4.20.

pure guessing here...
vmware relies on having kernel modules instaled.. perhaps
the do an ioctl to enter the module and then they spin
off some threads with nice -10 from inside?

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