Messages in this thread | | | Date | Mon, 21 Aug 2006 12:55:31 +0200 | From | Wolfgang Erig <> | Subject | Re: Fw: Regression with hyper threading scheduling |
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On Sun, Aug 20, 2006 at 06:04:00PM +1000, Peter Williams wrote: > ... > >lshw > > description: Mini Tower Computer > > product: SCENIC P / SCENICO P > > vendor: FUJITSU SIEMENS > > version: SCEP > > serial: YBEM738326 > > width: 32 bits > > capabilities: smbios-2.31 dmi-2.31 > > configuration: boot=normal chassis=mini-tower > > uuid=FA48F283-A977-D811-A847-912FD384AB1D > > *-core > > description: Motherboard > > product: D1561 > > vendor: FUJITSU SIEMENS > > physical id: 0 > > version: S26361-D1561 > > slot: Serial-1 > > *-firmware > > description: BIOS > > vendor: FUJITSU SIEMENS // Phoenix Technologies Ltd. > > physical id: 0 > > version: 5.00 R2.14.1561.01 (11/25/2004) > > size: 109KB > > capacity: 448KB > > capabilities: pci pnp apm upgrade shadowing escd cdboot > > bootselect int13floppynec int13floppytoshiba int13floppy360 > > int13floppy1200 int13floppy720 int13floppy2880 int5printscreen > > int9keyboard int14serial int17printer int10video acpi usb agp > > ls120boot zipboot biosbootspecification > > *-cpu > > description: CPU > > product: Intel(R) Pentium(R) 4 CPU 2.60GHz > > vendor: Intel Corp. > > physical id: 4 > > bus info: cpu@0 > > version: 15.2.9 > > slot: CPU > > size: 2600MHz > > capacity: 2600MHz > > width: 32 bits > > clock: 800MHz > > capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce > > cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx > > fxsr sse sse2 ss ht tm pbe cid > > configuration: id=1 > ... > > I'm unable to reproduce this problem with 2.6.18-rc4 on my HT system. > I'm using top with the "last processor" field enabled to observe (rather > than the methods described) and the two bash shells are both getting > 100% and are each firmly affixed to different CPUs.
We can see the problem only on the hardware above. Another (newer) system runs perfectly:
lshw description: Mini Tower Computer product: SCENIC P / SCENICO P vendor: FUJITSU SIEMENS version: SCEP2 serial: YBPB012753 width: 32 bits capabilities: smbios-2.31 dmi-2.31 configuration: boot=normal chassis=mini-tower uuid=F5585067-4E15-11D9-897B-0030057E3EC7 *-core description: Motherboard product: D1931 vendor: FUJITSU SIEMENS physical id: 0 version: S26361-D1931 serial: 16105060 slot: Serial-1 *-firmware description: BIOS vendor: FUJITSU SIEMENS // Phoenix Technologies Ltd. physical id: 0 version: 5.00 R1.08.1931 (12/03/2004) size: 110KB capacity: 448KB capabilities: pci pnp apm upgrade shadowing escd cdboot bootselect int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp ls120boot zipboot biosbootspecification *-cpu description: CPU product: Intel(R) Pentium(R) 4 CPU 3.20GHz vendor: Intel Corp. physical id: 4 bus info: cpu@0 version: 15.4.1 serial: 0000-0F41-0000-0000-0000-0000 slot: CPU size: 3200MHz capacity: 3200MHz width: 32 bits clock: 800MHz capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor ds_cpl cid xtpr configuration: id=0 ...
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