https://bugzilla.kernel.org/show_bug.cgi?id=15675
Len Brown <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO CC| |[email protected] Regression|No |Yes Summary|Very high power |Starting 2.6.32, C2 is used |consumption, 40000+ wakeups |and results in 40000 |from idle per second -- |wake/sec -- Lenovo 3000 |Lenovo 3000 N200 |N200 --- Comment #20 from Len Brown <[email protected]> 2010-04-03 21:13:14 --- This looks exactly like bug 14742. Linux 2.6.31 uses C1 and avoids C2. Linux 2.6.32 (and later) includes a logic update in cpuidle which causes it to use C2 and thrash with C0 time and huge wakeups/sec. (Thus, marking this as a regression, even though it is because 2.6.32 has exposed a latent bug) "idle=halt" works around the problem. Please verify that "processor.max_cstate=1" also works around the problem. (it is like idle=halt, but will allow using mwait in C1 instead of HLT) > Intel Pentium Dual Core T2370 @1.73GHz Please paste here the output from "cat /proc/cpuinfo" Also, regarding bug 15377 -- that one is similar, but has some differences. Please boot without enabling the network interfaces and run powertop -d to see if the problem is still there. If no, then enable the network and if that provokes the failure. On a failing kernel, please attach the output from "dmesg -s64000". Please attach the standard output from acpidump, plus a copy of the files in /sys/firmware/acpi/tables/dynamic/* Finally, if you happen to have a Windows partition on this box, please run perfmon, add the C2 counter and report what you see. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
