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xen-users
[Xen-users] On an eight cpu system domU 'cap' can only be set to 100
On a 8 Core system only dom0 can set cap > 100 and vcpus > 1. On a domU
'xm sched-credit -d <domU> -c 200'
says "Error: cap is out of range". Vcpu cannot be set higher than 1 -
regardless of boot/config/command line. Low performance is equivalent to the
cap setting.
See 'xm list --long':
(domain
(domid 0)
(uuid 00000000-0000-0000-0000-000000000000)
(vcpus 8)
(cpu_weight 1.0)
(memory 256)
(shadow_memory 0)
(maxmem 256)
(features )
(name Domain-0)
(on_poweroff destroy)
(on_reboot restart)
(on_crash restart)
(state r-----)
(shutdown_reason poweroff)
(cpu_time 458.198750944)
(online_vcpus 8)
)
(domain
(domid 5)
(uuid f9070996-4ae2-bbc6-ad88-80e0da1a13f1)
(vcpus 1)
(cpu_weight 1.0)
(memory 1024)
(shadow_memory 0)
(maxmem 2048)
(features )
(name dev-services)
(on_poweroff destroy)
(on_reboot restart)
(on_crash restart)
(image
(linux
(kernel /boot/vmlinuz-2.6.18-5-xen-amd64)
(ramdisk /boot/initrd.img-2.6.18-5-xen-amd64)
(ip 10.10.10.56:1.2.3.4:10.10.10.254:255.255.255.0::eth0:off)
(root '/dev/sda1 ro')
(args 'mem=2048M')
)
)
(device
(vif
(backend 0)
(script vif-bridge)
(bridge xenbr1)
(mac 00:16:3e:00:00:01)
)
)
(device
(vbd
(backend 0)
(dev sda1:disk)
(uname phy:server/dev-services-root)
(mode w)
)
)
(state -b----)
(shutdown_reason poweroff)
(cpu_time 5.184650252)
(online_vcpus 1)
(up_time 1186.54874301)
(start_time 1202999946.85)
(store_mfn 628537)
(console_mfn 628536)
)
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