Hi. I has xen virtual machine in paravirtualisation. Host and guest sysstems are CentOS. When I use top in guest machine I see, that system use 20% resourses. But in host machine I see, that machine use 50% resourses. In config machine has 5 processors, and has cpu_cap 352. Processor is 2266MHz. Therefor for statistic in guest machine it use ~ 2266 MHz(1 processor), and for Xen hypervisor - 4000 MHz. Can somebody ask how it happens? Thanks. -- Vasilyev Igor _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Fri, Aug 13, 2010 at 3:24 PM, masterito <admin@masterito.spb.ru> wrote:> Hi. > > I has xen virtual machine in paravirtualisation. Host and guest sysstems > are CentOS. When I use top in guest machine I see, that system use 20% > resourses. But in host machine I see, that machine use 50% resourses. > In config machine has 5 processors, and has cpu_cap 352. Processor is > 2266MHz. Therefor for statistic in guest machine it use ~ 2266 MHz(1 > processor), and for Xen hypervisor - 4000 MHz. > Can somebody ask how it happens? > >In general, dom0''s cpu load is not directly related domU''s cpu usage. Note however that domU''s I/O operation will increase dom0''s CPU utilization. Use "xm top" to find out how much resource each dom0/domU uses. -- Fajar _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi. I use xm top. 50% load I see in this utility(machine has 352 cpu_cat and in xm top I see 180-190). В Пт, 13/08/2010 в 15:36 +0700, Fajar A. Nugraha пишет:> On Fri, Aug 13, 2010 at 3:24 PM, masterito <admin@masterito.spb.ru> > wrote: > Hi. > > I has xen virtual machine in paravirtualisation. Host and > guest sysstems > are CentOS. When I use top in guest machine I see, that system > use 20% > resourses. But in host machine I see, that machine use 50% > resourses. > In config machine has 5 processors, and has cpu_cap 352. > Processor is > 2266MHz. Therefor for statistic in guest machine it use ~ 2266 > MHz(1 > processor), and for Xen hypervisor - 4000 MHz. > Can somebody ask how it happens? > > > > In general, dom0''s cpu load is not directly related domU''s cpu > usage. Note however that domU''s I/O operation will increase dom0''s CPU > utilization. > > > Use "xm top" to find out how much resource each dom0/domU uses. > > > -- > Fajar > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
AFAIK xentop (xm top - is alias for xentop) displays VM activity with included I/O time of backend drivers in dom0. Somewhere in internets I saw document about xentop, and authors note that backend IO time usually does not count as guest VM time (so xentop solves this). В Птн, 13/08/2010 в 12:24 +0400, masterito пишет:> Hi. > > I has xen virtual machine in paravirtualisation. Host and guest sysstems > are CentOS. When I use top in guest machine I see, that system use 20% > resourses. But in host machine I see, that machine use 50% resourses. > In config machine has 5 processors, and has cpu_cap 352. Processor is > 2266MHz. Therefor for statistic in guest machine it use ~ 2266 MHz(1 > processor), and for Xen hypervisor - 4000 MHz. > Can somebody ask how it happens? > > Thanks. > > -- > Vasilyev Igor > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users