[Libvirt-cim] virNodeGetFreeMemory() returns bytes with Xen driver

[Daniel Veillard]

On Tue, Apr 14, 2009 at 08:12:10AM -0700, Kaitlin Rupert wrote:
> Hi Tyrel,
>
> My guess is that the libvirt documentation is incorrect.  I would follow  
> up with the libvirt devs on libvir-list at redhat.com to be sure though.

Yes, that's unfortunate, as I replied on the list the implementations
didn't follow the description, so I'm updating the description with a
note to avoid troubles.

Daniel

> Tyrel Datwyler wrote:
>>
>> The libvirt API states that the return value of virNodeGetFreeMemory()  
>> is in kilobytes. When making this call against a Xen hypervisor and  
>> comparing the returned value with what is listed by "xm info" it  
>> appears that libvirt is returning the free memory in bytes and not  
>> kilobytes. Can anybody confirm this behavior?
>>
>> This code snippet:
>>
>>     conn = virConnectOpen("xen:///localhost/");
>>     hostmem = virNodeGetFreeMemory(conn);
>>     fprintf(stdout, "Host free memory = %llu\n", hostmem);
>>
>> produces the following output:
>>
>>     Host free memory = 3236012032
>>
>> The following comes from running "xm info" on the Xen host:
>>
>>     free_memory            : 3086
>>
>> The libvirt value is convertable into the "xm" returned value if bytes  
>> is assumed.
>>
>> Regards,
>>
>> Tyrel Datwyler
>>
>> Linux Software Engineer
>> eServer Systems Management
>> IBM Systems and Technology Group
>> Email: tyreld at us.ibm.com
>> External: (503) 578-3489,  T/L: 775-3489
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Libvirt-cim mailing list
>> Libvirt-cim at redhat.com
>> https://www.redhat.com/mailman/listinfo/libvirt-cim
>
> _______________________________________________
> Libvirt-cim mailing list
> Libvirt-cim at redhat.com
> https://www.redhat.com/mailman/listinfo/libvirt-cim

-- 
Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
daniel at veillard.com  | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library  http://libvirt.org/