on 07/12/2007 01:17 PM Bernhard Auzinger wrote the following: >>>> bogomips : 3611.22 >>>> TLB size : 1024 4K pages >>>> >>>> bogomips : 1603.39 >>>> TLB size : 1024 4K pages >>>> >>>> 2) Just curious: Why is there such a big difference between the 2 CPUs' >>>> bogomips values reported? >>>> -- >>>> [EMAIL PROTECTED] mailing list >> -- >> Piotr > > There has to be no difference between the two cores on dual-core processors. > That's because the bogomips-benchmark is a "calculated" benchmark that > depends mostly on the clock frequency and since the two cores on dual-core > athlons/opterons use the same clock, it's not possible to have different > values on that type of dual-core processor. I've absolutely identical values > (4825.77 bogomips) for both cores of my Athlon64 X2 4600+. > > If you have two processors (f.ex. two single-cores) on your mainboard, than > you will have two slightly different values because of the slightly different > clock of the two processors. In your case it seems that the second processor > has a decreased clock. I'm sure you have enabled cool'n'quiet. > > Rgds
Actually I had never changed the CPUs freq/governor states, and they were set to 800MHz/userspace. After I changed their state using gnome applet, and from then on, the two CPUs' bogomips values where equal. For governor set to performance here they are: #cat /proc/cpuinfo |grep -E 'proc|MHz|bogomips' processor : 0 cpu MHz : 1800.000 bogomips : 8125.24 processor : 1 cpu MHz : 1800.000 bogomips : 8125.24 However, if I boot into M$ windblows (dual boot system), then boot into linux without touching the CPUs' freq/gov state the MHz/bogomips values are changed back to: processor : 0 cpu MHz : 800.000 bogomips : 3611.94 processor : 1 cpu MHz : 800.000 bogomips : 1603.39 The 800 MHz is because I have compiled with CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y CONFIG_CPU_FREQ_GOV_USERSPACE=y -- [EMAIL PROTECTED] mailing list
