The problem is that XenServer virtualises each core as a separate physical processor in its own socket. Windows Server 2008 and 2003 are limited to 4 sockets, so you can only see 4 of your 8 cores in the task manager.<\/p>\n
If you look in the Device Manger you’ll see all 8 cores because Windows sees them all, but won’t let you use them.<\/p>\n
If you look in the XenServer Host console in the Hardware section, it will report 8 physical CPUs too.<\/p>\n
In XenCenter set the VCPUs for your VM to 2.<\/p>\n
Then enter the attached code snipped into the XenServer Host console. To find the UUID for your VM, type: xe vm-param-set platform:cores-per-socket=4 uuid=xxxxxx<\/p>\n xe vm-param-set VCPUs-max=8 uuid=xxxxxxx<\/p>\n xe vm-param-set VCPUs-at-startup=8 uuid=xxxxxx<\/p>\n <\/code><\/p>\n Now boot the VM and the task manager should show all 8 cores.<\/p>\n","protected":false},"excerpt":{"rendered":" The problem is that XenServer virtualises each core as a separate physical processor in its own socket. Windows Server 2008 and 2003 are limited to 4 sockets, so you can only see 4 of your 8 cores in the task manager. If you look in the Device Manger you’ll see all 8 cores because Windows […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"_links":{"self":[{"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/840"}],"collection":[{"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=840"}],"version-history":[{"count":3,"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/840\/revisions"}],"predecessor-version":[{"id":843,"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/840\/revisions\/843"}],"wp:attachment":[{"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xfloyd.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n
\nxe vm-list<\/p>\n