Hi, Thanks. Can I expect future versions of powertop will consider my problem or it is a specific bug related to my BIOS (my laptop is HP Pavilion DV2000)? I mean, this misreading is a bug in powertop or not? -------------------------- *Mahmood Naderan* On Sun, Jun 21, 2009 at 2:43 PM, Edward Shao<laface.tw@xxxxxxxxx> wrote: > Hi~ > powertop can download from > http://www.lesswatts.org/projects/powertop/download/powertop-1.11.tar.gz > > Sorry~I forgot the name of Intel utility. > > Best Regards, > Edward > > On Sun, Jun 21, 2009 at 6:02 PM, Mahmood Naderan<mahmood.nt@xxxxxxxxx> wrote: >> Hi, >> 1- where can I find powertop source code? >> 2- what is the name of intel utility in windows as you said? >> -------------------------- >> *Mahmood Naderan* >> >> >> >> >> On Sun, Jun 21, 2009 at 2:19 PM, Edward Shao<laface.tw@xxxxxxxxx> wrote: >>> Hi~ >>> It's all depended on how utility to interpret raw information (both >>> information reported by CPU or BIOS). >>> You can check source code of powertop for detail information. >>> For BIOS part, powertop checks value of mwait hint register reported >>> by ACPI _CST method. >>> >>> As my experience, powertop will cause a misleading sometimes, >>> especially for new Intel CPU. >>> For example: >>> BIOS engineer said they followed Intel BIOS porting guide to report an >>> accuracy C-state (C6) information via ACPI _CST method. >>> However powertop said BIOS only reports C3. (but Intel utility under >>> Windows said CPU can enter C6). >>> >>> Best Regards, >>> Edward >>> >>> On Sat, Jun 20, 2009 at 2:54 PM, Mahmood Naderan<mahmood.nt@xxxxxxxxx> wrote: >>>> Hi, >>>>> Only simple check value of edx. >>>>> Well, unless CPU uses CPUID.5.EDX[31:20], the reserved area. >>>> >>>> You mean that powertop is not correctly reading the states? Do you >>>> mean that the BIOS reports better that the CPU ? >>>> >>>> -------------------------- >>>> *Mahmood Naderan* >>>> >>>> >>>> >>>> On Sat, Jun 20, 2009 at 7:26 AM, Edward Shao <laface.tw@xxxxxxxxx> wrote: >>>>> >>>>> Hi Mahmood, >>>>> >>>>> So far as I know, if your CPU is Intel, powertop maybe cause a misleading. >>>>> Powertop uses CPUID.5.EDX to check CPU supported C states. >>>>> According Intel's spec (Intel Processor Identification and the CPUID >>>>> Instruction (Application Note 485), a CPU only has >>>>> >>>>> C0, C1, C2, C3, C4 (prior Core i7) >>>>> C0, C1, C2, C6, C7 (Core i7 and subsequent) >>>>> >>>>> Check with source code of powertop >>>>> while (edx) { >>>>> if (edx&7) >>>>> printf("C%i ", i); >>>>> edx = edx >> 4; >>>>> i++; >>>>> } >>>>> Only simple check value of edx. >>>>> Well, unless CPU uses CPUID.5.EDX[31:20], the reserved area. >>>>> >>>>> Ps: I does not check AMD's spec. >>>>> >>>>> Best Regards, >>>>> Edward >>>>> >>>>> >>>>> On Sat, Jun 20, 2009 at 1:07 AM, Mahmood Naderan<mahmood.nt@xxxxxxxxx> wrote: >>>>> > Hi, >>>>> > I have run powertop with root permission with both AC and batter powers. The >>>>> > reported C_States are the same and strange: >>>>> > >>>>> > mahmood@magma:~$ sudo powertop >>>>> > PowerTOP 1.11 (C) 2007, 2008 Intel Corporation >>>>> > >>>>> > Collecting data for 5 seconds >>>>> > >>>>> > Your CPU supports the following C-states : C1 C2 C3 C4 C5 C6 >>>>> > Your BIOS reports the following C-states : C1 C2 C6 >>>>> > >>>>> > Where are C4 and C5? >>>>> > >>>>> > -------------------------- >>>>> > *Mahmood Naderan* >>>>> > -- >>>>> > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in >>>>> > the body of a message to majordomo@xxxxxxxxxxxxxxx >>>>> > More majordomo info at http://vger.kernel.org/majordomo-info.html >>>>> > >>>>> >>>>> >>>>> >>>>> -- >>>>> Best Regards, >>>>> Edward >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> >>> >>> >>> >>> -- >>> Best Regards, >>> Edward >>> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > > > -- > Best Regards, > Edward > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
