https://bugzilla.kernel.org/show_bug.cgi?id=19702
--- Comment #55 from Thomas Renninger <tr...@suse.de> 2011-08-15 15:04:25 --- You could use tools/power/x86/turbostat.c from the latest mainline kernel and replace two lines: print_counters(cnt_delta); with dump_cnt(cnt_delta); and compare with/without turboboost. You could also use tools/power/cpupower/ with debug option compile in (Makefile) and the cpupower -d monitor -m Mperf but this won't be that nicely formatted. You may be able to disable turboboost at runtime via a MSR read, mask out a bit and write the value back. According to chapter: 14.3.2.2 OS Control of Opportunistic Processor Performance Operation of Intel® 64 and IA-32 Architectures Software Developer’s Manual Volume 3A the bit is bit 32 (starting from 0) of the IA32_PERF_CTL MSR (0199H) MSR register. You have to make sure msr driver is compiled in or as module (modprobe msr) then you can use msr-tools: rdmsr 0x199 will show you the 64 bit register. If you boot with turboboost enabled you find bit 32 set otherwise unset. If I haven't overseen something you can enable/disable turbo mode via: IA32_PERF_CTL=`rdmsr 0x199` # disable wrmsr -a 0x199 $((~(1 << 32) & $IA32_PERF_CTL)) # enable wrmsr -a 0x199 $(((1 << 32) | $IA32_PERF_CTL)) -a option only exists in latest msr-tools git version which can be found here: git://git.kernel.org/pub/scm/utils/cpu/msr-tools/msr-tools.git Something to play with..., hopefully you find out something pointing to the root cause... -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
