[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] kernel-xen can not recognize more than 32 cores
Hi mohammad By another kernel I mean kernel-xen from CentOS 5.5. The kernel has been compiled for x86_64 architecture. So it is supposed to use more than 32 cores. I run xm dmesg command and Surprisingly I see 48 cores. But catching /proc/cpuinfo and xm list gives me only 32 recognized cores. What I need is just to make kernel and xen aware of all cores. It is already aware of all the hardware, as "xm dmesg" shows you.The kernel, dom0, is just a (special) domain. Last time I checked Xen domains can support up to 32 cores. You will not be able to see more within a single domain, but the Xen tools, and guests, can still use all your cores. It can be argued that you should assign a much smaller number of cores to your dom0 anyway, via dom0-cpus in xend-config.sxp (or other ways). My system has 48 cores, but just 2 assigned to dom0 # grep processor /proc/cpuinfo processor : 0 processor : 1 # xm info | grep nr_cpus nr_cpus : 48Similarly my dom0 can see only up to 32 GB of RAM, but the system actually has 256 GB, and anyway I limit dom0 to 10G via dom0_mem boot option. YMMV, Kevin _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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