Hello, As the title says, I am willing to transfer one CPU Core from my dom0 to one of my virtual machine. I have not found any easy "how-to" explaining clearly the step-by-step procedure. Here are the details of the CPU distribution: dom0:/# xm vcpu-list Name ID VCPU CPU State Time(s) CPU Affinity Domain-0 0 0 0 r-- 12503.2 any cpu Domain-0 0 1 1 -b- 1136.3 any cpu Domain-0 0 2 - --p 7.2 any cpu Domain-0 0 3 - --p 1.3 any cpu srv1.mydom.be 1 0 2 -b- 24588.0 2 srv2.mydom.be 9 0 3 -b- 8727.8 0,3 srv1 is hosting a mail server (postfix,cyrus) and running fine srv2 is hosting a website (apache) and is sometimes very (too) busy. I added 1GB of memory in the xen config file and that helped but the limit is now the CPU load. As dom0 (running debian 5.0.10) does not host many services, I think that only one core would be enough (CPU is 99% idle most of the time). I am definitely not an expert using Xen so could someone explain me how to transfer CPU assignation? Should I use VCPUs or only CPUs? Here are the cpuinfo for all my domains: the actual situation is : dom0 has 2 processors while srv1 and srv2 have only one: *dom0:/# cat /proc/cpuinfo* processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3220 @ 2.40GHz stepping : 11 cpu MHz : 2400.166 cache size : 4096 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu de tsc msr pae cx8 apic mtrr cmov pat clflush acpi mmx fxsr sse sse2 ss ht nx constant_tsc pni ssse3 bogomips : 4802.91 clflush size : 64 power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3220 @ 2.40GHz stepping : 11 cpu MHz : 2400.166 cache size : 4096 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu de tsc msr pae cx8 apic mtrr cmov pat clflush acpi mmx fxsr sse sse2 ss ht nx constant_tsc pni ssse3 bogomips : 4802.91 clflush size : 64 power management: *srv1:~# cat /proc/cpuinfo* processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3220 @ 2.40GHz stepping : 11 cpu MHz : 2400.084 cache size : 4096 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu de tsc msr pae cx8 apic cmov pat clflush acpi mmx fxsr sse sse2 ss ht nx constant_tsc up pni ssse3 bogomips : 4806.37 clflush size : 64 power management: *srv2:/# cat /proc/cpuinfo* processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3220 @ 2.40GHz stepping : 11 cpu MHz : 2400.082 cache size : 4096 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu de tsc msr pae cx8 apic cmov pat clflush acpi mmx fxsr sse sse2 ss ht nx constant_tsc up pni ssse3 bogomips : 4803.14 clflush size : 64 power management: Thank you for your help, Yannick _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users