Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422780AbWJRTna (ORCPT ); Wed, 18 Oct 2006 15:43:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422789AbWJRTna (ORCPT ); Wed, 18 Oct 2006 15:43:30 -0400 Received: from bizon.gios.gov.pl ([212.244.124.8]:55229 "EHLO bizon.gios.gov.pl") by vger.kernel.org with ESMTP id S1422780AbWJRTn3 (ORCPT ); Wed, 18 Oct 2006 15:43:29 -0400 Date: Wed, 18 Oct 2006 21:43:16 +0200 (CEST) From: Krzysztof Oledzki X-X-Sender: olel@bizon.gios.gov.pl To: linux-kernel@vger.kernel.org, cpufreq@lists.linux.org.uk Subject: 3.2GHz cpus with cpufreq become 2.8GHz Message-ID: MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-187430788-1139018627-1161200596=:29935" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4297 Lines: 143 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---187430788-1139018627-1161200596=:29935 Content-Type: TEXT/PLAIN; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Hello, I have just noticed that enabling cpufreq on my Dell PowerEdge 1425SC=20 changes my secondary cpu clock to 2.8GHz. # 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 : 6403.72 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 : 6400.24 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 : 6400.30 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 : 6400.29 According to cpuinfo the primary CPU (two HT logical CPUs) works with=20 3.2GHz clock but the secondary works with 2.8GHz. What is also strange, this 3.2GHz freq is not listed on=20 scaling_available_frequencies for both CPUs: # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver p4-clockmod # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 350000 700000 1050000 1400000 1750000 2100000 2450000 2800000 # cat /sys/devices/system/cpu/cpu2/cpufreq/scaling_driver p4-clockmod # cat /sys/devices/system/cpu/cpu2/cpufreq/scaling_available_frequencies 350000 700000 1050000 1400000 1750000 2100000 2450000 2800000 I can confirm that this problem exists on 2.6.16/2.6.17/2.6.18 (just=20 tested). Is it a problem with BIOS or p4-clockmod cpufreq driver? Best regards, =09=09=09=09Krzysztof Ol=EAdzki ---187430788-1139018627-1161200596=:29935-- - 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/