On Thu, Apr 29, 2010 at 9:54 PM, Kumar L Srikanth-B22348 <B22348@freescale.com> 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@freescale.com> 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@freescale.com> 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@freescale.com> 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@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...
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