https://bugzilla.kernel.org/show_bug.cgi?id=15896 Summary: Powernow-k8 detects wrong p-states for AMD Thuban 6-core processor (1090T) Product: Power Management Version: 2.5 Kernel Version: 2.6.33.3 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: cpufreq AssignedTo: cpufreq@xxxxxxxxxxxxxxx ReportedBy: llowrey@xxxxxxxxxxxxxxxxx Regression: No Output during boot: powernow-k8: Found 1 AMD Phenom(tm) II X6 1090T Processor processors (6 cpu cores) (version 2.20.00) powernow-k8: 0 : pstate 0 (3600 MHz) powernow-k8: 1 : pstate 1 (3200 MHz) powernow-k8: 2 : pstate 2 (2400 MHz) powernow-k8: 3 : pstate 3 (1600 MHz) My understanding of AMD's Turbo Core is that the 3.6GHz p-state 0 is supposed to be a hidden hardware p-state and that the OS kernel should see hw p-state 1 (3.2GHz) as it's p-state 0. My expectation is to see: p-state 0: 3200 MHz p-state 1: 2400 MHz p-state 2: 1600 MHz p-state 3: 800 MHz Note: the lowest clock 800MHz is missing from the list output by powernow-k8. I am running this on a Gigabyte GA-890GPA-UD3H v1 board with the latest non-beta bios F6. The bios does support, and recognize, the 1090T processor. I do have the Turbo Core option enabled in the bios. While cpufreq does identify the hw p-state 3600MHz, it does not use it. I have run mprime with 1 thread and with 6 and there is never any time recorded for 3600MHz. When under full load, cores run at 3200MHz, which is expected. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
