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td-ifs@web.de

2008-Feb-14 15:09 UTC

[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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td-ifs@web.de

2008-Feb-14 15:13 UTC

head link

[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)
)
_______________________________________________________________________
Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage
kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220


_______________________________________________
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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

pierre.gentile@mpsa.com

2008-Feb-14 17:14 UTC

head link

Réf. : [Xen-users] On an eight cpu system domU ''cap'' can only be set to 100

You should try to put : vcpus = 8 into your domu configuration file and
restart it

Regards

Pierre Gentile


                                                                           
             td-ifs@web.de                                                 
             Envoyé par :                                                  
             xen-users-bounce                                         Pour 
             s@lists.xensourc          xen-users@lists.xensource.com       
             e.com                                                      cc 
                                                                           
                                                                     Objet 
             14/02/2008 16:13          [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)
)
_______________________________________________________________________
Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage
kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users



_______________________________________________
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http://lists.xensource.com/xen-users

John Madden

2008-Feb-14 20:15 UTC

head link

Re: Réf. : [Xen-users] On an eight cpu system domU ''cap'' can only be set to 100

On Thu, 2008-02-14 at 21:21 +0100, td-ifs@web.de wrote:> Does not change anything. Regardless where I set vcpu I cannot increase it.
> 
> I forgot the environment: Debian Etch, amd64, Xen 3.0.3-1
Is the domU kernel SMP-capable?

John




-- 
John Madden
Sr. UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden@ivytech.edu


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td-ifs@web.de

2008-Feb-14 20:21 UTC

head link

Re: Réf. : [Xen-users] On an eight cpu system domU 'cap' can only be set to 100

Does not change anything. Regardless where I set vcpu I cannot increase it.

I forgot the environment: Debian Etch, amd64, Xen 3.0.3-1

Thanks
   Thomas D


On Thursday 14 February 2008 18:14, pierre.gentile@mpsa.com
wrote:> You should try to put : vcpus = 8 into your domu configuration file and
> restart it
>
> Regards
>
> Pierre Gentile
>
>
>
>              td-ifs@web.de
>              Envoyé par :
>              xen-users-bounce                                         Pour
>              s@lists.xensourc          xen-users@lists.xensource.com
>              e.com                                                      cc
>
>                                                                      Objet
>              14/02/2008 16:13          [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)
> )
> _______________________________________________________________________
> Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage
> kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220
>
>
> _______________________________________________
> 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
_______________________________________________
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pierre.gentile@mpsa.com

2008-Feb-15 08:29 UTC

head link

Réf. : Re: Réf. : [Xen-users] On an eight cpu system domU ''cap'' can only be set to 100

My config :

HP DL585-G2/SLES10-SP1/Xen 3.0.4_13138-0.60

Scheduling info :

# xm sched-credit -d yval1410
{''cap'': 120, ''weight'': 220}

Domu configuration :

# cat /etc/xen/auto/yval1410.cfg

----8<----
kernel = ''/users/eso69/xen/kernels/vmlinuz-xen''
ramdisk = ''/users/eso69/xen/kernels/initrd-xen''

localtime = 0

memory = 11264

maxmem = 22528

name = ''yval1410''

vif = [ ''mac=00:16:3e:2f:6f:eb,bridge=xenbr0'' ]
ip = ''10.82.173.133''

disk = [
''phy:/dev/evms/.nodes/lvm2/yval1410/system,xvda,w'',
''phy:/dev/evms/.nodes/lvm2/yval1410/altsystem,xvdb,w'',
''phy:/dev/evms/.nodes/lvm2/yval1410/users,xvdc,w'',
]

root = ''/dev/evms/lvm2/system/rootvol''

extra = ''xencons=tty''

vcpus = 8

on_poweroff = ''destroy''
on_reboot = ''restart''
on_crash = ''restart''
----8<----

Hope it helps

Regards

Pierre Gentile


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