From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Galbraith Subject: p4_clockmod broken in 2.6.16-rc? kernels Date: Thu, 09 Mar 2006 07:11:48 +0100 Message-ID: <1141884708.7865.16.camel@homer> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" To: cpufreq@lists.linux.org.uk Cc: davej@codemonkey.org.uk Greetings, As subject says, it appears to be broken for at least one single P4 HT system, namely mine. 2.6.15 works fine. With a UP compiled kernel, it fails completely, due to CPU0 failure to initialize. With an SMP compiled kernel, CPU0 fails, but the sibling initializes. Nothing good happens afterward though. See debug (cpufreq.debug=7) output below. Cheers, -Mike cpufreq-core: trying to register driver p4-clockmod cpufreq-core: adding CPU 0 p4-clockmod: has errata -- disabling frequencies lower than 2ghz speedstep-lib: x86: f, model: 2 speedstep-lib: ebx value is 9, x86_mask is 9 speedstep-lib: P4 - MSR_EBC_FREQUENCY_ID: 0xf12000f 0x0 speedstep-lib: P4 - FSB 200000 kHz; Multiplier 15; Speed 3000000 kHz freq-table: setting show_table for cpu 0 to c14bd800 freq-table: table entry 0 is invalid, skipping freq-table: table entry 1 is invalid, skipping freq-table: table entry 2 is invalid, skipping freq-table: table entry 3 is invalid, skipping freq-table: table entry 4 is invalid, skipping freq-table: table entry 5 is invalid, skipping freq-table: table entry 6 is invalid, skipping freq-table: table entry 7 is invalid, skipping freq-table: table entry 8 is invalid, skipping cpufreq-core: initialization failed cpufreq-core: adding CPU 1 p4-clockmod: has errata -- disabling frequencies lower than 2ghz speedstep-lib: x86: f, model: 2 speedstep-lib: ebx value is 9, x86_mask is 9 speedstep-lib: P4 - MSR_EBC_FREQUENCY_ID: 0xf12000f 0x0 speedstep-lib: P4 - FSB 200000 kHz; Multiplier 15; Speed 3000000 kHz freq-table: setting show_table for cpu 1 to c14bd800 freq-table: table entry 0 is invalid, skipping freq-table: table entry 1: 375000 kHz, 1 index freq-table: table entry 2: 750000 kHz, 2 index freq-table: table entry 3: 1125000 kHz, 3 index freq-table: table entry 4: 1500000 kHz, 4 index freq-table: table entry 5: 1875000 kHz, 5 index freq-table: table entry 6: 2250000 kHz, 6 index freq-table: table entry 7: 2625000 kHz, 7 index freq-table: table entry 8: 3000000 kHz, 8 index cpufreq-core: setting new policy for CPU 1: 375000 - 3000000 kHz freq-table: request for verification of policy (375000 - 3000000 kHz) for cpu 1 freq-table: verification lead to (375000 - 3000000 kHz) for cpu 1 freq-table: request for verification of policy (375000 - 3000000 kHz) for cpu 1 freq-table: verification lead to (375000 - 3000000 kHz) for cpu 1 cpufreq-core: new min and max freqs are 375000 - 3000000 kHz cpufreq-core: governor switch cpufreq-core: __cpufreq_governor for CPU 1, event 1 performance: setting to 3000000 kHz because of event 1 cpufreq-core: target for CPU 1: 3000000 kHz, relation 1 freq-table: request for target 3000000 kHz (relation: 1) for cpu 1 freq-table: target is 8 (3000000 kHz, 8) cpufreq-core: governor: change or update limits cpufreq-core: __cpufreq_governor for CPU 1, event 3 performance: setting to 3000000 kHz because of event 3 cpufreq-core: target for CPU 1: 3000000 kHz, relation 1 freq-table: request for target 3000000 kHz (relation: 1) for cpu 1 freq-table: target is 8 (3000000 kHz, 8) cpufreq-core: initialization complete cpufreq-core: driver p4-clockmod up and running p4-clockmod: P4/Xeon(TM) CPU On-Demand Clock Modulation available [lack of events]