https://bugzilla.kernel.org/show_bug.cgi?id=19702 --- Comment #36 from vyncere <vyncere@xxxxxxxxx> 2010-11-01 13:42:47 --- Hi everyone, Hi Thomas, Here some result on my Thinkpad T410, Intel Core i5 520 M. * 2.6.32.15 (Kernel Reference with functionnal cpufreq) - Boot params : None # cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc hpet acpi_pm # cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc # While CPU is idling : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 1824000 00 sec 067 ms 00 sec 932 ms 06 001 1392000 00 sec 007 ms 00 sec 992 ms 00 002 1272000 00 sec 010 ms 00 sec 989 ms 01 003 1488000 00 sec 005 ms 00 sec 994 ms 00 000 1656000 00 sec 052 ms 00 sec 947 ms 05 001 2232000 00 sec 016 ms 00 sec 983 ms 01 002 1272000 00 sec 009 ms 00 sec 990 ms 00 003 1464000 00 sec 005 ms 00 sec 994 ms 00 000 1248000 00 sec 026 ms 00 sec 973 ms 02 001 1992000 00 sec 043 ms 00 sec 956 ms 04 002 1272000 00 sec 011 ms 00 sec 988 ms 01 003 1488000 00 sec 006 ms 00 sec 993 ms 00 # While kernel is compiling (make -j 3) : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 2664000 00 sec 997 ms 00 sec 002 ms 99 001 2664000 00 sec 512 ms 00 sec 487 ms 51 002 2664000 00 sec 812 ms 00 sec 187 ms 81 003 2664000 00 sec 876 ms 00 sec 123 ms 87 000 2664000 00 sec 771 ms 00 sec 228 ms 77 001 2664000 00 sec 857 ms 00 sec 142 ms 85 002 2664000 00 sec 814 ms 00 sec 185 ms 81 003 2664000 00 sec 731 ms 00 sec 268 ms 73 000 2664000 00 sec 446 ms 00 sec 553 ms 44 001 2664000 00 sec 885 ms 00 sec 114 ms 88 002 2664000 00 sec 962 ms 00 sec 037 ms 96 003 2664000 00 sec 990 ms 00 sec 009 ms 99 # cpufreq-info current policy: frequency should be within 1.20 GHz and 2.40 GHz. * 2.6.36 (+ 2 Patches HW_COORD, SHARED_TYPE) - Boot params : None # cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc hpet acpi_pm # cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc # While CPU is idling : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 1200000 00 sec 066 ms 00 sec 933 ms 06 001 1224000 00 sec 038 ms 00 sec 961 ms 03 002 1368000 00 sec 002 ms 00 sec 997 ms 00 003 1320000 00 sec 002 ms 00 sec 997 ms 00 000 1200000 00 sec 055 ms 00 sec 944 ms 05 001 1224000 00 sec 033 ms 00 sec 966 ms 03 002 1344000 00 sec 002 ms 00 sec 997 ms 00 003 1272000 00 sec 001 ms 00 sec 998 ms 00 000 1224000 00 sec 057 ms 00 sec 942 ms 05 001 1224000 00 sec 033 ms 00 sec 966 ms 03 002 1392000 00 sec 002 ms 00 sec 997 ms 00 003 1344000 00 sec 001 ms 00 sec 998 ms 00 # While kernel is compiling (make -j 3) : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 1176000 00 sec 585 ms 00 sec 414 ms 58 001 1176000 00 sec 719 ms 00 sec 280 ms 71 002 1200000 00 sec 825 ms 00 sec 174 ms 82 003 1176000 00 sec 951 ms 00 sec 048 ms 95 000 1200000 00 sec 874 ms 00 sec 125 ms 87 001 1176000 00 sec 864 ms 00 sec 135 ms 86 002 1200000 00 sec 776 ms 00 sec 223 ms 77 003 1200000 00 sec 586 ms 00 sec 413 ms 58 000 1176000 00 sec 903 ms 00 sec 096 ms 90 001 1200000 00 sec 841 ms 00 sec 158 ms 84 002 1200000 00 sec 682 ms 00 sec 317 ms 68 003 1176000 00 sec 702 ms 00 sec 297 ms 70 # cpufreq-info current policy: frequency should be within 1.20 GHz and 1.20 GHz. * 2.6.36 (+ 3 Patches HW_COORD, SHARED_TYPE, HW_ALL) - Boot params : None # cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc hpet acpi_pm # cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc # While CPU is idling : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 1224000 00 sec 053 ms 00 sec 946 ms 05 001 1248000 00 sec 022 ms 00 sec 977 ms 02 002 1320000 00 sec 002 ms 00 sec 997 ms 00 003 1344000 00 sec 002 ms 00 sec 997 ms 00 000 1224000 00 sec 061 ms 00 sec 938 ms 06 001 1272000 00 sec 018 ms 00 sec 981 ms 01 002 1344000 00 sec 002 ms 00 sec 997 ms 00 003 1344000 00 sec 003 ms 00 sec 996 ms 00 000 1224000 00 sec 060 ms 00 sec 939 ms 06 001 1248000 00 sec 015 ms 00 sec 984 ms 01 002 1416000 00 sec 002 ms 00 sec 997 ms 00 003 1368000 00 sec 002 ms 00 sec 997 ms 00 # While kernel is compiling (make -j 3) : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 1200000 00 sec 101 ms 00 sec 898 ms 10 001 1200000 00 sec 079 ms 00 sec 920 ms 07 002 1200000 00 sec 201 ms 00 sec 798 ms 20 003 1200000 00 sec 828 ms 00 sec 171 ms 82 000 1200000 00 sec 112 ms 00 sec 887 ms 11 001 1200000 00 sec 515 ms 00 sec 484 ms 51 002 1200000 00 sec 006 ms 00 sec 993 ms 00 003 1200000 00 sec 528 ms 00 sec 471 ms 52 000 1200000 00 sec 567 ms 00 sec 432 ms 56 001 1200000 00 sec 275 ms 00 sec 724 ms 27 002 1176000 00 sec 253 ms 00 sec 746 ms 25 003 1176000 00 sec 120 ms 00 sec 879 ms 12 # cpufreq-info current policy: frequency should be within 1.20 GHz and 1.20 GHz. * 2.6.36 (+ 4 Patches HW_COORD, SHARED_TYPE, HW_ALL, HW_STATISTICS) - Boot params for patch 4 : acpi_cpufreq.disable_average=1 # dmesg | grep cpufreq acpi-cpufreq: average (aperf/mperf) accounting disabled by user # cat /sys/devices/system/clocksource/clocksource0/available_clocksource tsc hpet acpi_pm # cat /sys/devices/system/clocksource/clocksource0/current_clocksource tsc # While CPU is idling : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 1200000 00 sec 084 ms 00 sec 915 ms 08 001 1248000 00 sec 016 ms 00 sec 983 ms 01 002 1368000 00 sec 011 ms 00 sec 988 ms 01 003 1344000 00 sec 003 ms 00 sec 996 ms 00 000 1224000 00 sec 056 ms 00 sec 943 ms 05 001 1224000 00 sec 059 ms 00 sec 940 ms 05 002 1320000 00 sec 010 ms 00 sec 989 ms 01 003 1296000 00 sec 004 ms 00 sec 995 ms 00 000 1224000 00 sec 054 ms 00 sec 945 ms 05 001 1224000 00 sec 033 ms 00 sec 966 ms 03 002 1368000 00 sec 010 ms 00 sec 989 ms 01 003 1368000 00 sec 003 ms 00 sec 996 ms 00 # While kernel is compiling (make -j 3) : cpufreq-aperf CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 1176000 00 sec 815 ms 00 sec 184 ms 81 001 1200000 00 sec 532 ms 00 sec 467 ms 53 002 1176000 00 sec 997 ms 00 sec 002 ms 99 003 1200000 00 sec 997 ms 00 sec 002 ms 99 000 1200000 00 sec 501 ms 00 sec 498 ms 50 001 1200000 00 sec 731 ms 00 sec 268 ms 73 002 1176000 00 sec 997 ms 00 sec 002 ms 99 003 1200000 00 sec 997 ms 00 sec 002 ms 99 000 1176000 00 sec 714 ms 00 sec 285 ms 71 001 1176000 00 sec 889 ms 00 sec 110 ms 88 002 1176000 00 sec 934 ms 00 sec 065 ms 93 003 1176000 00 sec 778 ms 00 sec 221 ms 77 # cpufreq-info current policy: frequency should be within 1.20 GHz and 1.20 GHz. It's very interesting. With the old good 2.6.32 kernel (with working cpufreq), while CPU is idling, according to cpufreq-aperf, the clock speeds fluctuate between 1.20GHz to 1.80GHz, sometimes up to 2.40GHz. Hummmm... it's not very good for power saving... It may explains why my CPU is always near 50ÂC. It's slightly better with 2.6.36 kernel. (Thanks to Intel Idle maybe ?! I don't know.) I don't know if it's really the true clock speeds since my conky monitor always shows me the 4 virtual cores at 1.2 GHz... But I think that cpufreq-aperf is more accurate than everything else. cpufreq-info always report a 1.20GHz max limit. In my case, the problem is not solved. With the 3 different kernel configurations (2.6.36 + patches), with high CPU loads, clock speeds still remain at the lowest state. Ironically, cpufreq-aperf shows that frequencies never exceed 1.2OGHz at full load, contrary to idle time ! It's an upside-down world... -- 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.-- 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
