Date: Fri, 29 Jan 2010 23:28:17 +0000 From: "Hoang V.D. | Creative Solutions GmbH" <hoang.v.d@creativesolutions.at> To: "freebsd-hardware@freebsd.org" <freebsd-hardware@freebsd.org> Subject: FreeBSD 8.0, Intel Xeon E5530, Dell R410, only 2 cores available Message-ID: <65BCAB515656D34AA48B0E713966CC83046A64@MBX021-E2-NJ-5.exch021.domain.local>
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Hello, We just purchased a Dell PowerEdge R410 server with this CPU: Intel Xeon Processor E5530 http://ark.intel.com/Product.aspx?id=37103 According to specs the CPU has 4 cores, 8 Hyper-Threading threads, however after installing FreeBSD 8.0 (amd64), only 2 cores (4 SMT threads) were recognized by the kernel. Here is the relevant dmesg extract: ----------------- Copyright (c) 1992-2009 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 8.0-RELEASE-p2 #0: Tue Jan 5 21:11:58 UTC 2010 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: Intel(R) Xeon(R) CPU E5530 @ 2.40GHz (2394.01-MHz K8-class CPU) Origin = "GenuineIntel" Id = 0x106a5 Stepping = 5 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=0x9ce3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,DCA,SSE4.1,SSE4.2,POPCNT> AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM> AMD Features2=0x1<LAHF> TSC: P-state invariant real memory = 8589934592 (8192 MB) avail memory = 8247111680 (7865 MB) ACPI APIC Table: <DELL PE_SC3 > FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 SMT threads cpu0 (BSP): APIC ID: 16 cpu1 (AP): APIC ID: 17 cpu2 (AP): APIC ID: 18 cpu3 (AP): APIC ID: 19 ioapic1: Changing APIC ID to 1 ioapic0 <Version 2.0> irqs 0-23 on motherboard ioapic1 <Version 2.0> irqs 32-55 on motherboard ... ----------------- We was expecting to see "1 package(s) x 4 core(s) x 2 SMT threads" and 8 usable "cpus" Instead. According to sysctl: kern.smp.cpus: 4 kern.smp.maxcpus: 32 hw.ncpu: 4 machdep.hlt_cpus: 0 We have made no change to the BIOS settings (all settings are set by default by Dell). Could anyone help us with an explanation for this issue? Best regards, Hoang V.D.
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