Date: Tue, 23 Dec 2008 17:20:45 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-performance@freebsd.org Subject: Re: intel i7 and Hyperthreading Message-ID: <gir34t$bkl$1@ger.gmane.org> In-Reply-To: <200812192214.mBJMEj2Q009511@lava.sentex.ca> References: <200812192214.mBJMEj2Q009511@lava.sentex.ca>
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Mike Tancsa wrote: > FreeBSD 7.1-PRERELEASE #0: Fri Dec 19 19:48:15 EST 2008 > mdtancsa@ns3c.recycle.net:/usr/obj/usr/src/sys/recycle > Timecounter "i8254" frequency 1193182 Hz quality 0 > CPU: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (2666.78-MHz > 686-class CPU) > Origin = "GenuineIntel" Id = 0x106a4 Stepping = 4 > > Features=0xbfebfbff<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,PBE> > > > Features2=0x98e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,POPCNT> > > AMD Features=0x28100000<NX,RDTSCP,LM> > AMD Features2=0x1<LAHF> > Cores per package: 8 > Logical CPUs per core: 2 > real memory = 2138992640 (2039 MB) > avail memory = 2084880384 (1988 MB) > ACPI APIC Table: <INTEL DX58SO > > FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs > cpu0 (BSP): APIC ID: 0 > cpu1 (AP): APIC ID: 1 > cpu2 (AP): APIC ID: 2 > cpu3 (AP): APIC ID: 3 > cpu4 (AP): APIC ID: 4 > cpu5 (AP): APIC ID: 5 > cpu6 (AP): APIC ID: 6 > cpu7 (AP): APIC ID: 7 I just thought of another thing - can you boot an 8-CURRENT kernel on the machine and report the value of kern.sched.topology_spec sysctl? This is to verify how the ULE sees the HTT topology of the CPUs.
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