Which version of gnome-system-monitor are you running? You can check it in the menu by clicking Help->About. The 3.8 version has an option in Edit->Preferences->Resources tab to draw a stacked area chart. Toggling that option maybe shows what you would like to see, with a twist: all core usages are shown on one graph, but summed up as a stacked area chart, so that you can see how each core contributes to the total usage, but you can also see the total usage. See the attached image from my System Monitor 3.8 (available in the stable 13.04 and the development 13.10 version) Would that help you, or you would like to see something else?
** Attachment added: "Stacked area chart in Gnome System Monitor 3.8" https://bugs.launchpad.net/ubuntu/+source/gnome-system-monitor/+bug/1201229/+attachment/3737225/+files/stacked.png ** Changed in: gnome-system-monitor (Ubuntu) Assignee: (unassigned) => Robert Roth (evfool) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1201229 Title: Should be a choice for one graph on multicore CPUs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-system-monitor/+bug/1201229/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs