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

On Thu, Apr 29, 2010 at 9:54 PM, Kumar L Srikanth-B22348 <B22348(a)freescale.com&gt; wrote: > Thanks Ozaki. > Please let me know the result, once you checked with 0.8.0. I may understand what happen. Could you check 'tree -d /cgroup' where running your domain and could you find that a directory named your domain has another directory named some numeric number? If so, could you try cgroup without ns subsystem like mount -t cgroup -o cpu,cpuacct,cpuset,memory,devices cgroup /cgroup or something. I guess running lxc with ns subsystem of cgroup has still problems.

 ozaki-r > > 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 >>>> >>> >>> >> >> > >