Re: [libvirt] 'dommemstat' is not working for LXC hypervisor.

Thanks Ozaki. Please let me know the result, once you checked with 0.8.0.

Regards, Srikanth. -----Original Message----- From: Ryota Ozaki [mailto:ozaki.ryota@gmail.com] Sent: Thursday, April 29, 2010 6:14 PM To: Kumar L Srikanth-B22348 Cc: Daniel P. Berrange; libvirt list; Ryota OZAKI Subject: Re: [libvirt] 'dommemstat' is not working for LXC hypervisor. On Thu, Apr 29, 2010 at 9:32 PM, Kumar L Srikanth-B22348 <B22348(a)freescale.com&gt; wrote: > Now it's showing Used Memory as 0. I don't know whether it's correct or not. > I wrote a small script in the domain to check the used memory, which will run continuously in the infinite loop. > dominfo 'domainname' is showing Used Memory as 0. > Is this right way to check the Used Memory of that domain? dominfo should be...but something wrong. In my machine, dominfo shows like: # virsh -c lxc:/// dominfo 31105 Id:             31105 Name:           cl_lxc_test UUID:           fd7b21d9-6cbb-17a8-53dd-233f0aed4b4a OS Type:        exe State:          running CPU(s):         1 CPU time:       3.0s Max memory:     131072 kB Used memory:    23672 kB Autostart:      disable However, the version of libvirt is not 0.8.0. So I try to check what changed by recent updates. Thanks,  ozaki-r > > Regards, > Srikanth. > > -----Original Message----- > From: Ryota Ozaki [mailto:ozaki.ryota@gmail.com] > Sent: Thursday, April 29, 2010 5:50 PM > To: Kumar L Srikanth-B22348 > Cc: Daniel P. Berrange; libvirt list; Ryota OZAKI > Subject: Re: [libvirt] 'dommemstat' is not working for LXC hypervisor. > > On Thu, Apr 29, 2010 at 9:14 PM, Kumar L Srikanth-B22348 <B22348(a)freescale.com&gt; wrote: >> Thanks ozaki. >> But can you please elaborate the process of getting memory.stat of a particular domain? >> I mounted cgroup filesystem prior to start libvirtd service using the below command: >> mount -t cgroup cgroup /cgroup >> >> Then started libvirtd service. >> Then started the domain. >> >> Here, can you let me know the process of viewing memory stats of that particular domain? > > Could you check output of dominfo again. Cannot you get proper 'Used memory'? > >> By the way, in the /cgroup directory lot of files are created. In those, which one can be memory stats? > > /cgroup/memory.stat is. > >  ozaki-r > >> >> Regards, >> Srikanth. >> >> -----Original Message----- >> From: Ryota Ozaki [mailto:ozaki.ryota@gmail.com] >> Sent: Thursday, April 29, 2010 5:27 PM >> To: Kumar L Srikanth-B22348 >> Cc: Daniel P. Berrange; libvirt list; Ryota OZAKI >> Subject: Re: [libvirt] 'dommemstat' is not working for LXC hypervisor. >> >> On Wed, Apr 28, 2010 at 8:19 PM, Kumar L Srikanth-B22348 <B22348(a)freescale.com&gt; wrote: >>> Daniel, >>> My requirement is to get how much memory is free in the guest domain. >>> Can you please let me know, how can I do that? >> >> Do you enable cgroup memory subsystem? If so, something wrong in lxc driver of 0.8.0. >> >> BTW, 'Used memory' includes both RSS and caches, so if you need total-RSS value, you should use dommemstat. >> >>> And also, as you said it's quite easy to implement dommemstats for >>> lxc driver, is there any possibility to implement that? >> >> We can get statistics of dommemstat easily through memory.stat of cgroup.memory subsystem except statistics of page faults. >> >>  ozaki-r >> >>> >>> Regards, >>> Srikanth. >>> >>> -----Original Message----- >>> From: Daniel P. Berrange [mailto:berrange@redhat.com] >>> Sent: Wednesday, April 28, 2010 4:46 PM >>> To: Kumar L Srikanth-B22348 >>> Cc: libvir-list(a)redhat.com >>> Subject: Re: 'dommemstat' is not working for LXC hypervisor. >>> >>> On Wed, Apr 28, 2010 at 04:43:41PM +0530, Kumar L Srikanth-B22348 wrote: >>>> Thanks for the reply Daniel. >>>> Virsh dominfo dommand showing following results: >>>> >>>> Id:             32473 >>>> Name:           vm1 >>>> UUID:           f13bc513-15f2-1dd1-74f6-18c47931ece9 >>>> OS Type:        exe >>>> State:          running >>>> CPU(s):         1 >>>> Max memory:     5000000 kB >>>> Used memory:    5000000 kB >>>> Autostart:      disable >>>> >>>> >>>> Though whatever services running on the domain, every time used >>>> memory >>> >>>> is showing as 5000000 kB. Is that result is correct? >>> >>> The 'Max memory' 5000000 KB is the hard limit that is allocated to >>> the container. I thought that the 'used memory' field would be >>> lower, but its possible we don't have the actual stats for used >>> memory so just set both the same. I'd have to research the code again to answer for sure... >>> >>> Daniel >>> -- >>> |: Red Hat, Engineering, London    -o- >>> http://people.redhat.com/berrange/ :| >>> |: http://libvirt.org -o- http://virt-manager.org -o- >>> http://deltacloud.org :| >>> |: http://autobuild.org        -o- >>> http://search.cpan.org/~danberr/ :| >>> |: GnuPG: 7D3B9505  -o-   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 >>> |7D3B >>> 9505 :| >>> >>> >>> -- >>> libvir-list mailing list >>> libvir-list(a)redhat.com >>> https://www.redhat.com/mailman/listinfo/libvir-list >>> >> >> > >