On 07/09/04 13:06, Steve Kargl wrote: > On Fri, Jul 09, 2004 at 12:53:53PM -0500, Jon Noack wrote: >> On 07/09/04 12:25, Steve Kargl wrote: >>> On Fri, Jul 09, 2004 at 12:19:09PM -0500, Jon Noack wrote: >>>> On 07/09/04 12:15, John Baldwin wrote: >>>>> My test machine is not a true SMP machine either, just HTT. >>>>> It has been running a -j 256 worldloop overnight with no >>>>> problems, so I committed a slightly modified version of the >>>>> patch yesterday. >>>> >>>> Did you test with a UP kernel? After your latest commit I have >>>> been experiencing regular hard locks on my pre-HTT P4 machine. >>>> Backing out rev. 1.114 of sched_ule.c fixes it. See my >>>> previous message (Re: FreeBSD keeps hanging......): >>>> http://docs.freebsd.org/cgi/mid.cgi?40EECC49.3070501 >>> >>> I've tested it on a UP kernel (HTT enabled, ACPI disabled, APIC >>> enabled, ULE). Appears to work fine. >> >> Perhaps it's just extraneous information, but if it's really a UP >> kernel (as in, no 'options SMP') then whether you have HTT enabled >> doesn't matter at all -- the kernel won't use it. > > Yes, I know. :-) I'm just reporting what dmesg tells me about the > CPU. > > CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz (1994.12-MHz > 686-class CPU) Origin = "GenuineIntel" Id = 0xf27 Stepping = 7 > Features=0xbfebf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Mine also lists HTT, but doesn't actually support it: CPU: Intel(R) Pentium(R) 4 CPU 2.53GHz (2539.10-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf24 Stepping = 4 Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM> I remember a discussion about this a long time ago, but don't remember the details. Regardless, the flag doesn't actually mean the processor supports HTT. JonReceived on Fri Jul 09 2004 - 16:12:47 UTC
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