On 09/09/2014 11:08 AM, Narayanan, Krishnaprasad wrote: > > Hi Chris, > > > > They appear to be processes when I see it in htop. I have attached the > screenshot of a VM named "instance-000001bf" that has 4 virtual cores. > In total, I can see 6 processes for the above referred VM. > > > > > > Can I know is there a way to differentiate between processes and threads? > > >
They ought to be processes according to the htop man page. But I suspect those are actually the thread IDs - one thread per each vcpu and another thread executing the main loop dispatching events. The last one seems to be a temporal work thread kicked off by the main loop. The four threads spent similar amount of time running guest code - the guest work load is spread evenly across all vcpus. You may also run 'ps -AL | grep qemu' to have a look at the thead Ids and the associated process ID (thread group ID). Liang > Best regards, > > Krishnaprasad > > > > -----Original Message----- > From: Chris Friesen [mailto:[email protected]] > Sent: Dienstag, 9. September 2014 16:31 > To: [email protected] > Subject: Re: [Openstack] KVM shows several processes for a single VM > on the host > > > > On 09/09/2014 07:58 AM, Narayanan, Krishnaprasad wrote: > > > Hallo all, > > > > > > I have an OpenStack setup based on Havana with several compute nodes. > > > When I instantiate a virtual machine with 1 or more virtual cores, in > > > the process list of the compute node, I am able to see more than 1 > > > process associated to the same VM. The process list that I refer is > > > the process which can be seen by running either top or htop. > > > > > > Can I know the significance of other processes which are associated to > > > the same VM? Are these child processes? > > > > Are they separate processes or separate threads? Separate threads > would be expected, but separate processes would not be. > > > > Chris > > > > > > _______________________________________________ > > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > Post to : [email protected] > <mailto:[email protected]> > > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
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