Hyperthreading CPU but 2nd "CPU" not shown

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Hyperthreading CPU but 2nd "CPU" not shown

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John7

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Since: May 27, 2008
Posts: 5

(Msg. 1) Posted: Wed Jun 11, 2008 10:21 pm Post subject: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: microsoft>public>windowsxp>general, others (more info?)

Hi, On a customer's system the second "cpu"does not show although: + CPU supports hyperthreading, + BIOS has hyperthreading enabled + ACPI 2.0 enabled. + Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. + New hardware detected, 2x reboot. But in Device Manager still 1 processor listed. In Task Manager still 1 Performance Window. How to fully enable hyperthreading ? System description P4 3GHz with hyperthreading. 2GB DDR400 WinXP Home + SP3 Office 2007 All updates NOD32 A/V RocketDock desktop enhancement TIA, John7 >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

AJR

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Since: Oct 9, 2008
Posts: 5

(Msg. 2) Posted: Wed Jun 11, 2008 10:21 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

Some Confusion - hyperthreading permits "one" processor to process more than one thread concurrently (providing application is programmed to take advantage). Hyperthreading by itself does not indicate multiple cores or processors. "John7" wrote in message > Hi, > > > > On a customer's system the second "cpu"does not show although: > + CPU supports hyperthreading, > + BIOS has hyperthreading enabled > + ACPI 2.0 enabled. > + Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. > + New hardware detected, 2x reboot. > > But in Device Manager still 1 processor listed. > In Task Manager still 1 Performance Window. > How to fully enable hyperthreading ? > > > System description > P4 3GHz with hyperthreading. > 2GB DDR400 > WinXP Home + SP3 > Office 2007 > All updates > NOD32 A/V > RocketDock desktop enhancement > > > TIA, > John7 > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

John John

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Since: Nov 23, 2008
Posts: 34

(Msg. 3) Posted: Wed Jun 11, 2008 10:21 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

What you say is true but a hyperthreaded processor will show up as two logical processors in the Device Manager. John AJR wrote: > Some Confusion - hyperthreading permits "one" processor to process more than > one thread concurrently (providing application is programmed to take > advantage). > > Hyperthreading by itself does not indicate multiple cores or processors. > > > "John7" wrote in message > >>Hi, >> >> >> >>On a customer's system the second "cpu"does not show although: >>+ CPU supports hyperthreading, >>+ BIOS has hyperthreading enabled >>+ ACPI 2.0 enabled. >>+ Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >>+ New hardware detected, 2x reboot. >> >>But in Device Manager still 1 processor listed. >>In Task Manager still 1 Performance Window. >>How to fully enable hyperthreading ? >> >> >>System description >>P4 3GHz with hyperthreading. >>2GB DDR400 >>WinXP Home + SP3 >>Office 2007 >>All updates >>NOD32 A/V >>RocketDock desktop enhancement >> >> >>TIA, >>John7 >> > > > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

Ricky

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Since: Jun 11, 2008
Posts: 1

(Msg. 4) Posted: Wed Jun 11, 2008 10:21 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

Open task manager..performance tab..view button..and under cpu history be sure 'one graph per cpu' is picked. "John John (MVP)" wrote in message > What you say is true but a hyperthreaded processor will show up as two > logical processors in the Device Manager. > > John > > AJR wrote: > >> Some Confusion - hyperthreading permits "one" processor to process more >> than one thread concurrently (providing application is programmed to >> take advantage). >> >> Hyperthreading by itself does not indicate multiple cores or processors. >> >> >> "John7" wrote in message > >> >>>Hi, >>> >>> >>> >>>On a customer's system the second "cpu"does not show although: >>>+ CPU supports hyperthreading, >>>+ BIOS has hyperthreading enabled >>>+ ACPI 2.0 enabled. >>>+ Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >>>+ New hardware detected, 2x reboot. >>> >>>But in Device Manager still 1 processor listed. >>>In Task Manager still 1 Performance Window. >>>How to fully enable hyperthreading ? >>> >>> >>>System description >>>P4 3GHz with hyperthreading. >>>2GB DDR400 >>>WinXP Home + SP3 >>>Office 2007 >>>All updates >>>NOD32 A/V >>>RocketDock desktop enhancement >>> >>> >>>TIA, >>>John7 >>> >> >> >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

Leythos

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Since: Jun 12, 2008
Posts: 1

(Msg. 5) Posted: Thu Jun 12, 2008 8:29 am Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

In article , NoSp.cut DeleteThis @m.No says... > On a customer's system the second "cpu"does not show although: > + CPU supports hyperthreading, > + BIOS has hyperthreading enabled > + ACPI 2.0 enabled. > + Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. > + New hardware detected, 2x reboot. > > But in Device Manager still 1 processor listed. > In Task Manager still 1 Performance Window. > How to fully enable hyperthreading ? You manually installed a driver for "ACPI Multi". Have you done the windows updates since, not the express ones, the custom ones and then the optional hardware ones? Have you also updated your BIOS to the most current version? >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

John7

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Since: May 27, 2008
Posts: 5

(Msg. 6) Posted: Thu Jun 12, 2008 1:47 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

To all, Please stop this architecture discussion. I am trying to get a new customer's PC fixed. Technical details described in initial post. Please read first. Additions: - Asus P4PE2-X bios 1004 - 2x 512MB DDR400 (checked OK) - Maxtor 160GB HD According CPU-Z P4 Prescott 90nm Fam/Model/Step : F / 4 / 1 xFam./xMod./Rev: F / 4 / E0 Core 3GHz Mult. 15x Bus 200MHz FSB 800MHz Thank you. John7 PS: considering bios 1005 although it states no improvements on this. "Ricky" wrote in message >> What you say is true but a hyperthreaded processor will show up as two >> logical processors in the Device Manager. >> >> John >> >> AJR wrote: >> >>> Some Confusion - hyperthreading permits "one" processor to process more >>> than one thread concurrently (providing application is programmed to >>> take advantage). >>> >>> Hyperthreading by itself does not indicate multiple cores or processors. >>> >>> >>> "John7" wrote in message >> >>> >>>>Hi, >>>> >>>> >>>> >>>>On a customer's system the second "cpu"does not show although: >>>>+ CPU supports hyperthreading, >>>>+ BIOS has hyperthreading enabled >>>>+ ACPI 2.0 enabled. >>>>+ Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >>>>+ New hardware detected, 2x reboot. >>>> >>>>But in Device Manager still 1 processor listed. >>>>In Task Manager still 1 Performance Window. >>>>How to fully enable hyperthreading ? >>>> >>>> >>>>System description >>>>P4 3GHz with hyperthreading. >>>>2GB DDR400 >>>>WinXP Home + SP3 >>>>Office 2007 >>>>All updates >>>>NOD32 A/V >>>>RocketDock desktop enhancement >>>> >>>> >>>>TIA, >>>>John7 >>>> >>> >>> > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

Paul

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Since: Dec 8, 2008
Posts: 53

(Msg. 7) Posted: Thu Jun 12, 2008 1:47 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

John7 wrote: > To all, > > Please stop this architecture discussion. > I am trying to get a new customer's PC fixed. > > Technical details described in initial post. > Please read first. > > Additions: > - Asus P4PE2-X bios 1004 > - 2x 512MB DDR400 (checked OK) > - Maxtor 160GB HD > > According CPU-Z > P4 Prescott 90nm > Fam/Model/Step : F / 4 / 1 > xFam./xMod./Rev: F / 4 / E0 > > Core 3GHz > Mult. 15x > Bus 200MHz > FSB 800MHz > > > Thank you. > John7 > > PS: considering bios 1005 although it states no improvements on this. > Judging by what I see here, I like the sound of your BIOS upgrade theory. There is a 1006.001 available on the download page. [URL="http://support.asus.com.tw/cpusupport/cpusupport.aspx?SLanguage=en-us&model=P4PE2-X"]http://support.asus.com.tw/cpusupport/cpusupport.aspx?SLanguage=en-us&model=P4PE2-X[/URL] Also, read the warnings for each BIOS in the BIOS list. [URL="http://support.asus.com.tw/download/download.aspx?SLanguage=en-us&model=P4PE2-X"]http://support.asus.com.tw/download/download.aspx?SLanguage=en-us&model=P4PE2-X[/URL] Good luck, Paul >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

John7

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Since: May 27, 2008
Posts: 5

(Msg. 8) Posted: Thu Jun 12, 2008 1:50 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

To all, Please stop this architecture discussion. I am trying to get a new customer's PC fixed. Technical details described in initial post. Please read first. Additions: - Asus P4PE2-X bios 1004 - 2x 512MB DDR400 (checked OK) - Maxtor 160GB HD According CPU-Z P4 Prescott 90nm Fam/Model/Step : F / 4 / 1 xFam./xMod./Rev: F / 4 / E0 !!! No selection of cores possible despite enabled HT . Core 3GHz Mult. 15x Bus 200MHz FSB 800MHz Thank you. John7 PS: considering bios 1005 although it states no improvements on this. "Ricky" wrote in message >> What you say is true but a hyperthreaded processor will show up as two >> logical processors in the Device Manager. >> >> John >> >> AJR wrote: >> >>> Some Confusion - hyperthreading permits "one" processor to process more >>> than one thread concurrently (providing application is programmed to >>> take advantage). >>> >>> Hyperthreading by itself does not indicate multiple cores or processors. >>> >>> >>> "John7" wrote in message >> >>> >>>>Hi, >>>> >>>> >>>> >>>>On a customer's system the second "cpu"does not show although: >>>>+ CPU supports hyperthreading, >>>>+ BIOS has hyperthreading enabled >>>>+ ACPI 2.0 enabled. >>>>+ Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >>>>+ New hardware detected, 2x reboot. >>>> >>>>But in Device Manager still 1 processor listed. >>>>In Task Manager still 1 Performance Window. >>>>How to fully enable hyperthreading ? >>>> >>>> >>>>System description >>>>P4 3GHz with hyperthreading. >>>>2GB DDR400 >>>>WinXP Home + SP3 >>>>Office 2007 >>>>All updates >>>>NOD32 A/V >>>>RocketDock desktop enhancement >>>> >>>> >>>>TIA, >>>>John7 >>>> >>> >>> > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

John John

External

Since: Nov 23, 2008
Posts: 34

(Msg. 9) Posted: Thu Jun 12, 2008 1:50 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

Install the chipset drivers and update the processor drivers. John John7 wrote: > To all, > > Please stop this architecture discussion. > I am trying to get a new customer's PC fixed. > > Technical details described in initial post. > Please read first. > > Additions: > - Asus P4PE2-X bios 1004 > - 2x 512MB DDR400 (checked OK) > - Maxtor 160GB HD > > According CPU-Z > P4 Prescott 90nm > Fam/Model/Step : F / 4 / 1 > xFam./xMod./Rev: F / 4 / E0 > !!! No selection of cores possible despite enabled HT . > > Core 3GHz > Mult. 15x > Bus 200MHz > FSB 800MHz > > > Thank you. > John7 > > PS: considering bios 1005 although it states no improvements on this. > "Ricky" wrote in message > >> >>>What you say is true but a hyperthreaded processor will show up as two >>>logical processors in the Device Manager. >>> >>>John >>> >>>AJR wrote: >>> >>> >>>>Some Confusion - hyperthreading permits "one" processor to process more >>>>than one thread concurrently (providing application is programmed to >>>>take advantage). >>>> >>>>Hyperthreading by itself does not indicate multiple cores or processors. >>>> >>>> >>>>"John7" wrote in message >>> >>>> >>>> >>>>>Hi, >>>>> >>>>> >>>>> >>>>>On a customer's system the second "cpu"does not show although: >>>>>+ CPU supports hyperthreading, >>>>>+ BIOS has hyperthreading enabled >>>>>+ ACPI 2.0 enabled. >>>>>+ Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >>>>>+ New hardware detected, 2x reboot. >>>>> >>>>>But in Device Manager still 1 processor listed. >>>>>In Task Manager still 1 Performance Window. >>>>>How to fully enable hyperthreading ? >>>>> >>>>> >>>>>System description >>>>>P4 3GHz with hyperthreading. >>>>>2GB DDR400 >>>>>WinXP Home + SP3 >>>>>Office 2007 >>>>>All updates >>>>>NOD32 A/V >>>>>RocketDock desktop enhancement >>>>> >>>>> >>>>>TIA, >>>>>John7 >>>>> >>>> >>>> > > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

Pavel A.

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Since: Jun 12, 2008
Posts: 2

(Msg. 10) Posted: Thu Jun 12, 2008 2:33 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: microsoft>public>windowsxp>hardware, others (more info?)

Open a command prompt and type: set NUMBER_OF_PROCESSORS If this shows 2, then HT is working --PA "John7" wrote in message > Hi, > > > > On a customer's system the second "cpu"does not show although: > + CPU supports hyperthreading, > + BIOS has hyperthreading enabled > + ACPI 2.0 enabled. > + Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. > + New hardware detected, 2x reboot. > > But in Device Manager still 1 processor listed. > In Task Manager still 1 Performance Window. > How to fully enable hyperthreading ? > > > System description > P4 3GHz with hyperthreading. > 2GB DDR400 > WinXP Home + SP3 > Office 2007 > All updates > NOD32 A/V > RocketDock desktop enhancement > > > TIA, > John7 > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

John7

External

Since: May 27, 2008
Posts: 5

(Msg. 11) Posted: Thu Jun 12, 2008 2:33 pm Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

Thanks Pavel, As I expected: NUMBER_OF_PROCESSORS = 1 Another proof that HT is not working. Still puzzled, John7 "Pavel A." wrote in message >> Hi, >> >> >> >> On a customer's system the second "cpu"does not show although: >> + CPU supports hyperthreading, >> + BIOS has hyperthreading enabled >> + ACPI 2.0 enabled. >> + Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >> + New hardware detected, 2x reboot. >> >> But in Device Manager still 1 processor listed. >> In Task Manager still 1 Performance Window. >> How to fully enable hyperthreading ? >> >> >> System description >> P4 3GHz with hyperthreading. >> 2GB DDR400 >> WinXP Home + SP3 >> Office 2007 >> All updates >> NOD32 A/V >> RocketDock desktop enhancement >> >> >> TIA, >> John7 >> >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

Pavel A.

External

Since: Jun 12, 2008
Posts: 2

(Msg. 12) Posted: Fri Jun 13, 2008 12:02 am Post subject: Re: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: per prev. post (more info?)

Then - try a clean XP install form a generic disk (or, to save time, some Linux "live cd" that supports multiple CPUs). If all these won't see both CPUs, then you have a BIOS or hardware problem. In some cases, update over uniprocessor XP installation won't update kernel to multiprocessor. Regards, --PA "John7" wrote in message > Thanks Pavel, > > As I expected: > NUMBER_OF_PROCESSORS = 1 > Another proof that HT is not working. > > Still puzzled, > John7 > > > > "Pavel A." wrote in message > >>> Hi, >>> >>> >>> >>> On a customer's system the second "cpu"does not show although: >>> + CPU supports hyperthreading, >>> + BIOS has hyperthreading enabled >>> + ACPI 2.0 enabled. >>> + Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >>> + New hardware detected, 2x reboot. >>> >>> But in Device Manager still 1 processor listed. >>> In Task Manager still 1 Performance Window. >>> How to fully enable hyperthreading ? >>> >>> >>> System description >>> P4 3GHz with hyperthreading. >>> 2GB DDR400 >>> WinXP Home + SP3 >>> Office 2007 >>> All updates >>> NOD32 A/V >>> RocketDock desktop enhancement >>> >>> >>> TIA, >>> John7 >>> > > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

John7

External

Since: May 27, 2008
Posts: 5

(Msg. 13) Posted: Tue Jun 17, 2008 1:10 am Post subject: RESOLVED: Hyperthreading CPU but 2nd "CPU" not shown Archived from groups: microsoft>public>windowsxp>general, others (more info?)

To all, Thank you all for your help. A BIOS update to v1005 did the trick. Release notes do not mention this bug fix. John7 "John John (MVP)" wrote in message >> >>> >>>>What you say is true but a hyperthreaded processor will show up as two >>>>logical processors in the Device Manager. >>>> >>>>John >>>> >>>>AJR wrote: >>>> >>>> >>>>>Some Confusion - hyperthreading permits "one" processor to process more >>>>>than one thread concurrently (providing application is programmed to >>>>>take advantage). >>>>> >>>>>Hyperthreading by itself does not indicate multiple cores or >>>>>processors. >>>>> >>>>> >>>>>"John7" wrote in message >>>> >>>>> >>>>> >>>>>>Hi, >>>>>> >>>>>> >>>>>> >>>>>>On a customer's system the second "cpu"does not show although: >>>>>>+ CPU supports hyperthreading, >>>>>>+ BIOS has hyperthreading enabled >>>>>>+ ACPI 2.0 enabled. >>>>>>+ Windows "ACPI multiprocesor-pc" CPU device driver manualy selected. >>>>>>+ New hardware detected, 2x reboot. >>>>>> >>>>>>But in Device Manager still 1 processor listed. >>>>>>In Task Manager still 1 Performance Window. >>>>>>How to fully enable hyperthreading ? >>>>>> >>>>>> >>>>>>System description >>>>>>P4 3GHz with hyperthreading. >>>>>>2GB DDR400 >>>>>>WinXP Home + SP3 >>>>>>Office 2007 >>>>>>All updates >>>>>>NOD32 A/V >>>>>>RocketDock desktop enhancement >>>>>> >>>>>> >>>>>>TIA, >>>>>>John7 >>>>>> >>>>> >>>>> >> >> > >> Stay informed about: Hyperthreading CPU but 2nd ""CPU"" not shown

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