https://bugzilla.kernel.org/show_bug.cgi?id=187311
--- Comment #23 from Lv Zheng <lv.zh...@intel.com> --- (In reply to DE from comment #21) > Hello guys, it appears that it is not a good idea to use laptops... > I also get ridiculous amount of time to reach the boot screen of Ubuntu on > my AMD CQ57 laptop. > > I have had huge performance issues on that laptop as well as crashes. In > order to fix those, I had to check all CPU errata and decode some MSR > values. My BIOS has not patched a specific erratum and I made a simple > patch. This resulted in a rather large communication which is still in > progress[http://marc.info/?t=147688796200001&r=1&w=2]. > > While trying to see what is wrong, I found that my CPU was in C2 mode most > of the time whether it run on AC or battery! To get better performance I > have to use processor.max_cstate=1 as well as apply my erratum patch. > Unfortunately when I limit my laptop to C1, C1 option is vanished and no C > state is left! > > What is worse, crashes were observed on intel machines too > [https://bugzilla.kernel.org/show_bug.cgi?id=109051] > > > Pavel can you run some commands and inform me here? > > replace * with the CPU number > > first get > cat /sys/bus/cpu/devices/cpu*/cpufreq/scaling_available_governors > then > cat /sys/bus/cpu/devices/cpu*/cpufreq/scaling_governor > > now get > ls /sys/devices/system/cpu/cpu*/cpuidle > > if the above is not empty then for each state of each CPU run(replace % with > state number from the above command) > cat /sys/devices/system/cpu/cpu*/cpuidle/state%/name > cat /sys/devices/system/cpu/cpu*/cpuidle/state%/usage > > all those numbers will tell us how much time your CPUs spend on each C state. This sounds like an entirely different issue to me... -- You are receiving this mail because: You are watching the assignee of the bug. ------------------------------------------------------------------------------ _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
