Date: Fri, 17 Mar 2006 09:04:46 -0500 (EST) From: Tom Daly <tom@dyndns.com> To: freebsd-hackers@freebsd.org Subject: Recommended SMP Config Message-ID: <20060317085746.S15860@quartz.bos.dyndns.com>
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Hi, I'm running FreeBSD 6.0 Release (amd64) on Dell Poweredge 2850s. So far, so good. I'm doing a pretty vanilla install of things, enabling SMP in the kernel, and that's pretty much it. This server has 2 EM64T CPUs in it. When looking at top, CPU 1 rarely shows up with processes on it. systat does show it idle most of the time. Why is this? Why do processes land on CPU 0, 2, and 3 in most cases. Also, by setting machdep.hyperthreading_allowed=1, CPU 1 starts taking process onto it. Output from dmesg: CPU: Intel(R) Xeon(TM) CPU 3.00GHz (2992.71-MHz K8-class CPU) Origin = "GenuineIntel" Id = 0xf43 Stepping = 3 Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,C MOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Features2=0x641d<SSE3,RSVD2,MON,DS_CPL,CNTX-ID,CX16,<b14>> AMD Features=0x20100800<SYSCALL,NX,LM> Hyperthreading: 2 logical CPUs real memory = 5368709120 (5120 MB) avail memory = 4118777856 (3927 MB) ACPI APIC Table: <DELL PE BKC > FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 6 cpu3 (AP): APIC ID: 7 Can someone clarify this for me? Thanks, Tom -- Thomas J. Daly tom@dyndns.com Dynamic Network Services, Inc. http://www.dyndns.com/
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