vmware strange scheduling priority
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.
Quoted 19 lines · Peter Enderborg
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
Quoted 5 lines
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?
Quoted 6 lines
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Signature · 7 lines
winden/network In fact, this is all you need to know to be a Caveman Database Programmer: A relational database is a big spreadsheet that several people can update simultaneously.