Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751973AbWCOPoW (ORCPT ); Wed, 15 Mar 2006 10:44:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751982AbWCOPoW (ORCPT ); Wed, 15 Mar 2006 10:44:22 -0500 Received: from bizon.gios.gov.pl ([212.244.124.8]:29150 "EHLO bizon.gios.gov.pl") by vger.kernel.org with ESMTP id S1751973AbWCOPoW (ORCPT ); Wed, 15 Mar 2006 10:44:22 -0500 Date: Wed, 15 Mar 2006 16:44:05 +0100 (CET) From: Krzysztof Oledzki X-X-Sender: olel@bizon.gios.gov.pl To: Chuck Ebbert <76306.1226@compuserve.com> cc: linux-kernel , Andrew Morton , Ashok Raj Subject: Re: More than 8 CPUs detected and CONFIG_X86_PC cannot handle it on 2.6.16-rc6 In-Reply-To: <200603150553_MC3-1-BAB1-7C5A@compuserve.com> Message-ID: References: <200603150553_MC3-1-BAB1-7C5A@compuserve.com> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-187430788-1179346788-1142437445=:6328" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5115 Lines: 176 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---187430788-1179346788-1142437445=:6328 Content-Type: TEXT/PLAIN; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Wed, 15 Mar 2006, Chuck Ebbert wrote: > In-Reply-To: > > On Sun, 12 Mar 2006 03:04:40 +0100, Krzysztof Oledzki wrote: > >> After upgrading to 2.6.16-rc6 I noticed this strange message: >> >> More than 8 CPUs detected and CONFIG_X86_PC cannot handle it. >> Use CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP. >> >> This is a Dell PowerEdge SC1425 with two P4 Xeons with HT enabled (so wi= th >> totoal of 4 logical CPUs). > > In a later message, you wrote: > >> ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) >> Processor #0 15:4 APIC version 20 >> ACPI: LAPIC (acpi_id[0x02] lapic_id[0x06] enabled) >> Processor #6 15:4 APIC version 20 > ^ >> ACPI: LAPIC (acpi_id[0x03] lapic_id[0x01] enabled) >> Processor #1 15:4 APIC version 20 >> ACPI: LAPIC (acpi_id[0x04] lapic_id[0x07] enabled) >> Processor #7 15:4 APIC version 20 > ^ > > What processor numbers did you get on 2.6.15.x? Mar 6 00:08:03 fw2 kernel: Processor #0 15:4 APIC version 20 Mar 6 00:08:03 fw2 kernel: Processor #6 15:4 APIC version 20 Mar 6 00:08:03 fw2 kernel: Processor #1 15:4 APIC version 20 Mar 6 00:08:03 fw2 kernel: Processor #7 15:4 APIC version 20 > Does /proc/cpuinfo show all four CPUs? Yes. # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Xeon(TM) CPU 3.20GHz stepping : 3 cpu MHz : 3200.000 cache size : 2048 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes 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 consta= nt_tsc pni monitor ds_cpl cid cx16 xtpr bogomips : 6404.87 processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Xeon(TM) CPU 3.20GHz stepping : 3 cpu MHz : 3200.000 cache size : 2048 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes 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 consta= nt_tsc pni monitor ds_cpl cid cx16 xtpr bogomips : 6400.28 processor : 2 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Xeon(TM) CPU 3.20GHz stepping : 3 cpu MHz : 2800.000 cache size : 2048 KB physical id : 3 siblings : 2 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes 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 consta= nt_tsc pni monitor ds_cpl cid cx16 xtpr bogomips : 6400.31 processor : 3 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Xeon(TM) CPU 3.20GHz stepping : 3 cpu MHz : 2800.000 cache size : 2048 KB physical id : 3 siblings : 2 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes 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 consta= nt_tsc pni monitor ds_cpl cid cx16 xtpr bogomips : 6400.32 > If you start four CPU-hungry processes, do all four show 100% utilization= in top(1)? # cd /usr/src/linux # /usr/bin/time make -j10=20 (...) Cpu0 : 94.4% us, 5.3% sy, 0.0% ni, 0.3% id, 0.0% wa, 0.0% hi, 0.0% s= i Cpu1 : 92.4% us, 5.3% sy, 0.0% ni, 2.3% id, 0.0% wa, 0.0% hi, 0.0% s= i Cpu2 : 91.7% us, 6.6% sy, 0.0% ni, 0.3% id, 1.3% wa, 0.0% hi, 0.0% s= i Cpu3 : 94.7% us, 5.3% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 0.0% s= i Best regards, =09=09=09=09Krzysztof Ol=EAdzki ---187430788-1179346788-1142437445=:6328-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/