On Mon, 2006-10-02 at 12:01 -0400, Dave Jones wrote: > On Mon, Oct 02, 2006 at 09:45:27AM -0400, Thomas J. Baker wrote: > > > > I've got two questions related to cpu scaling. On my laptop I've got a > > Core 2 Duo. Can the two cores scale frequencies independently? > > No. Think about it. You have a single package, with a single power source. > > > Most of > > the time that doesn't seem like the case but every once in a while, my > > cpufreq applets show different speeds. I'm assuming that there is just a > > bit of slop involved and the two cores are always the same speed. > > It's a bug, but it should be cosmetic only. It's on the TODO, but > there are a number of other issues in this code that need tackling > first before it gets clean enough to fix this properly. > FC6-update/FC7 stuff. > > > On my desktop, I've got Xeon CPUs that support limited scaling; they run > > at either 2.8 or 3.4GHz. On FC5, they used to scale on demand but under > > FC6 they don't and the cpufreq applet has a manual setting for 2.8 or > > 3.4 with an automatic setting that is greyed out. > > Which cpufreq driver were they using ? > File a kernel bug, and attach dmesg. > > Dave > > Just curious - it must also a bug that under FC5, with two hyperthreaded Xeon CPUs, all four logical processors scale independently? I looked at my FC5 setup and had specified "DRIVER=acpi-cpufreq" manually. Doing this for FC6 made the scaling behave like FC5, automatically scaling up for load. Thanks, tjb -- ======================================================================= | Thomas Baker email: tjb@xxxxxxx | | Systems Programmer | | Research Computing Center voice: (603) 862-4490 | | University of New Hampshire fax: (603) 862-1761 | | 332 Morse Hall | | Durham, NH 03824 USA http://wintermute.sr.unh.edu/~tjb | ======================================================================= -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
