Sure, find below, I add other stuff as well. Note that there is some bug in the Bios. This does not prevent Centos to boot, and, since Windows sees all four processors, I reckon it shouldn't be the problem...?<br><br><br>
********************************************************<br>uname -a<br>********************************************************<br><br>Linux localhost.localdomain 2.6.18-53.1.21.el5PAE #1 SMP Tue May 20 10:03:06 EDT 2008 i686 i686 i386 GNU/Linux<br>
<br>********************************************************<br>cat /proc/cpuinfo<br>********************************************************<br><br>processor : 0<br>vendor_id : GenuineIntel<br>cpu family : 6<br>
model : 15<br>model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz<br>stepping : 11<br>cpu MHz : 2400.184<br>cache size : 4096 KB<br>physical id : 0<br>siblings : 1<br>core id : 0<br>
cpu cores : 1<br>fdiv_bug : no<br>hlt_bug : no<br>f00f_bug : no<br>coma_bug : no<br>fpu : yes<br>fpu_exception : yes<br>cpuid level : 10<br>wp : yes<br>flags : 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 ht tm pbe nx lm constant_tsc up pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm<br>
bogomips : 4802.08<br><br>*********************************************************<br>dmesg<br>********************************************************<br>Linux version 2.6.18-53.1.21.el5PAE (<a href="mailto:mockbuild@builder6.centos.org">mockbuild@builder6.centos.org</a>) (gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)) #1 SMP Tue May 20 10:03:06 EDT 2008<br>
BIOS-provided physical RAM map:<br> BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)<br> BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)<br> BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)<br> BIOS-e820: 0000000000100000 - 00000000cf213000 (usable)<br>
BIOS-e820: 00000000cf213000 - 00000000cf215000 (reserved)<br> BIOS-e820: 00000000cf215000 - 00000000cf2c8000 (usable)<br> BIOS-e820: 00000000cf2c8000 - 00000000cf3e5000 (ACPI NVS)<br> BIOS-e820: 00000000cf3e5000 - 00000000cf3e8000 (usable)<br>
BIOS-e820: 00000000cf3e8000 - 00000000cf3f3000 (ACPI data)<br> BIOS-e820: 00000000cf3f3000 - 00000000cf3f4000 (usable)<br> BIOS-e820: 00000000cf3f4000 - 00000000cf3ff000 (ACPI data)<br> BIOS-e820: 00000000cf3ff000 - 00000000cf400000 (usable)<br>
BIOS-e820: 00000000cf400000 - 00000000d0000000 (reserved)<br> BIOS-e820: 00000000f0000000 - 00000000f8000000 (reserved)<br> BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)<br> BIOS-e820: 0000000100000000 - 000000012c000000 (usable)<br>
3904MB HIGHMEM available.<br>896MB LOWMEM available.<br>found SMP MP-table at 000fe200<br>Memory for crash kernel (0x0 to 0x0) notwithin permissible range<br>disabling kdump<br>NX (Execute Disable) protection: active<br>On node 0 totalpages: 1228800<br>
DMA zone: 4096 pages, LIFO batch:0<br> Normal zone: 225280 pages, LIFO batch:31<br> HighMem zone: 999424 pages, LIFO batch:31<br>DMI 2.4 present.<br>Using APIC driver default<br>Intel MultiProcessor Specification v1.4<br>
Virtual Wire compatibility mode.<br>OEM ID: Product ID: APIC at: 0xFEE00000<br>Processor #0 6:15 APIC version 20<br>Enabling APIC mode: Flat. Using 0 I/O APICs<br>BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)<br>
Processors: 1<br>Allocating PCI resources starting at d2000000 (gap: d0000000:20000000)<br>Detected 2400.184 MHz processor.<br>Built 1 zonelists. Total pages: 1228800<br>Kernel command line: ro root=/dev/VolGroup00/LogVol00 acpi=off rhgb quiet<br>
mapped APIC to ffffd000 (fee00000)<br>Enabling fast FPU save and restore... done.<br>Enabling unmasked SIMD FPU exception support... done.<br>Initializing CPU#0<br>CPU 0 irqstacks, hard=c0740000 soft=c0720000<br>PID hash table entries: 4096 (order: 12, 16384 bytes)<br>
Console: colour VGA+ 80x25<br>Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)<br>Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)<br>Memory: 4067796k/4915200k available (2078k kernel code, 46260k reserved, 859k data, 220k init, 3197740k highmem)<br>
Checking if this processor honours the WP bit even in supervisor mode... Ok.<br>Calibrating delay using timer specific routine.. 4802.08 BogoMIPS (lpj=2401041)<br>Security Framework v1.0.0 initialized<br>SELinux: Initializing.<br>
SELinux: Starting in permissive mode<br>selinux_register_security: Registering secondary module capability<br>Capability LSM initialized as secondary<br>Mount-cache hash table entries: 512<br>CPU: After generic identify, caps: bfebfbff 20100000 00000000 00000000 0000e3bd 00000000 00000001<br>
CPU: After vendor identify, caps: bfebfbff 20100000 00000000 00000000 0000e3bd 00000000 00000001<br>monitor/mwait feature present.<br>using mwait in idle threads.<br>CPU: L1 I cache: 32K, L1 D cache: 32K<br>CPU: L2 cache: 4096K<br>
CPU: Physical Processor ID: 0<br>CPU: Processor Core ID: 0<br>CPU: After all inits, caps: bfebfbff 20100000 00000000 00000940 0000e3bd 00000000 00000001<br>Intel machine check architecture supported.<br>Intel machine check reporting enabled on CPU#0.<br>
Checking 'hlt' instruction... OK.<br>SMP alternatives: switching to UP code<br>Freeing SMP alternatives: 13k freed<br>CPU0: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz stepping 0b<br>Total of 1 processors activated (4802.08 BogoMIPS).<br>
Brought up 1 CPUs<br>sizeof(vma)=88 bytes<br>sizeof(page)=32 bytes<br>sizeof(inode)=340 bytes<br>sizeof(dentry)=136 bytes<br>sizeof(ext3inode)=492 bytes<br>sizeof(buffer_head)=52 bytes<br>sizeof(skbuff)=172 bytes<br>checking if image is initramfs... it is<br>
Freeing initrd memory: 2986k freed<br>NET: Registered protocol family 16<br>ACPI Exception (utmutex-0262): AE_BAD_PARAMETER, Thread C3689AA0 could not acquire Mutex [2] [20060707]<br>ACPI Exception (utmutex-0262): AE_BAD_PARAMETER, Thread C3689AA0 could not acquire Mutex [2] [20060707]<br>
PCI: Using configuration type 1<br>Setting up standard PCI resources<br>ACPI: Interpreter disabled.<br>Linux Plug and Play Support v0.97 (c) Adam Belay<br>pnp: PnP ACPI: disabled<br>usbcore: registered new driver usbfs<br>
usbcore: registered new driver hub<br>PCI: Probing PCI hardware<br>PCI: Probing PCI hardware (bus 00)<br><br><br><br><br><br><br><div class="gmail_quote">On Tue, May 27, 2008 at 4:47 PM, John R Pierce <<a href="mailto:pierce@hogranch.com">pierce@hogranch.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">Julian Echave wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
I'm running Centos 5.1 on an Intel Quad 2 Core with four Q6600 processors.<br>
Despite Centos 5 supporting multiple cores (SPM), it doesn't seem to work for me:<br>
1) a dmesg shows that only one processor is seen:<br>
"SPM alternatives: switching to UP code", etc.<br>
2) file /proc/cpuinfo shows only one processor<br>
3) top with option 1 (to toggle between seeing all processors or an average) shows only 1 processor.<br>
I've googled this, and other people have found this kind of trouble, but I was not able to find any solutions.<br>
</blockquote>
<br>
<br></div>
it might help diagnose this if you paste the output of 'dmesg' at least up to that "SMP Alternatives" message and maybe a couple more lines after it...<br>
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</blockquote></div><br>