That will be the process ID.
Regards, Liang On 09/09/2014 04:56 PM, Narayanan, Krishnaprasad wrote: > > Hi, > > > > I used the command ps --AL | grep qemu and I was able to see the > process ID 6850 having 6 thread IDs. In case, if I am interested to > measure the hardware performance counters / event provided by the CPU > registers such as CPU_CLK_UNHALTED, BRANCH_MISSES and etc..., can I > know which process ID should I be using to get this information? > > > > Regards, > > Krishnaprasad > > > > *From:*lchen [mailto:cl55h...@gmail.com] > *Sent:* Dienstag, 9. September 2014 20:16 > *To:* openstack@lists.openstack.org > *Subject:* Re: [Openstack] KVM shows several processes for a single VM > on the host > > > > > > 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:chris.frie...@windriver.com] > Sent: Dienstag, 9. September 2014 16:31 > To: openstack@lists.openstack.org > <mailto:openstack@lists.openstack.org> > 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 : openstack@lists.openstack.org > <mailto:openstack@lists.openstack.org> > > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > > > > _______________________________________________ > > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > Post to : openstack@lists.openstack.org > <mailto:openstack@lists.openstack.org> > > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >
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