Re: Rescheduling interrupts

From: S.ÃaÄlar Onur
Date: Tue Jan 22 2008 - 11:00:39 EST

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Hi;

22 Oca 2008 Sal tarihinde, Ingo Molnar ÅunlarÄ yazmÄÅtÄ:
>
> also, this might reduce the number of cross-CPU wakeups on near-idle
> systems:
>
> echo 1 > /sys/devices/system/cpu/sched_mc_power_savings
>
> [ or if it doesnt, it should ;) ]
>
> Ingo
> --
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Seems like nothing changes

zangetsu ~ # cat /sys/devices/system/cpu/sched_mc_power_savings
1

Powertop still reports ~300 wakeups for "<kernel IPI> : Rescheduling interrupts"

PowerTOP version 1.9 (C) 2007 Intel Corporation

Cn Avg residency P-states (frequencies)
C0 (cpu running) ( 4,8%)
C1 0,0ms ( 0,0%)
C2 0,2ms ( 2,4%)
C3 2,4ms (92,8%)

Wakeups-from-idle per second : 495,2 interval: 3,0s
no ACPI power usage estimate available

Top causes for wakeups:
40,0% (330,7) <kernel IPI> : Rescheduling interrupts
12,3% (102,0) USB device 3-2 : HP Integrated Module (Broadcom Corp)
12,1% (100,0) <interrupt> : uhci_hcd:usb3
8,0% ( 66,3) <interrupt> : extra timer interrupt
7,0% ( 58,0) amarokapp : schedule_timeout (process_timeout)
4,0% ( 33,0) <interrupt> : uhci_hcd:usb2

and this is what system is doing while powertop reports above;

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.1 0.0 1512 532 ? Ss 17:41 0:00 init [3]
root 2 0.0 0.0 0 0 ? S< 17:41 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S< 17:41 0:00 [migration/0]
root 4 0.0 0.0 0 0 ? S< 17:41 0:00 [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S< 17:41 0:00 [migration/1]
root 6 0.0 0.0 0 0 ? S< 17:41 0:00 [ksoftirqd/1]
root 7 0.0 0.0 0 0 ? S< 17:41 0:00 [events/0]
root 8 0.0 0.0 0 0 ? S< 17:41 0:00 [events/1]
root 9 0.0 0.0 0 0 ? S< 17:41 0:00 [khelper]
root 10 0.0 0.0 0 0 ? S< 17:41 0:00 [kblockd/0]
root 11 0.0 0.0 0 0 ? S< 17:41 0:00 [kblockd/1]
root 12 0.0 0.0 0 0 ? S< 17:41 0:00 [kacpid]
root 13 0.0 0.0 0 0 ? S< 17:41 0:00 [kacpi_notify]
root 14 0.0 0.0 0 0 ? S< 17:41 0:00 [cqueue/0]
root 15 0.0 0.0 0 0 ? S< 17:41 0:00 [cqueue/1]
root 16 0.0 0.0 0 0 ? S< 17:41 0:00 [kseriod]
root 17 0.0 0.0 0 0 ? S 17:41 0:00 [pdflush]
root 18 0.0 0.0 0 0 ? S 17:41 0:00 [pdflush]
root 19 0.0 0.0 0 0 ? S< 17:41 0:00 [kswapd0]
root 20 0.0 0.0 0 0 ? S< 17:41 0:00 [aio/0]
root 21 0.0 0.0 0 0 ? S< 17:41 0:00 [aio/1]
root 22 0.0 0.0 0 0 ? S< 17:41 0:00 [kpsmoused]
root 42 0.0 0.0 0 0 ? S< 17:41 0:00 [khpsbpkt]
root 46 0.0 0.0 0 0 ? S< 17:41 0:00 [knodemgrd_0]
root 55 0.0 0.0 0 0 ? S< 17:41 0:00 [ata/0]
root 56 0.0 0.0 0 0 ? S< 17:41 0:00 [ata/1]
root 57 0.0 0.0 0 0 ? S< 17:41 0:00 [ata_aux]
root 61 0.0 0.0 0 0 ? S< 17:41 0:00 [scsi_eh_0]
root 62 0.0 0.0 0 0 ? S< 17:41 0:00 [scsi_eh_1]
root 63 0.0 0.0 0 0 ? S< 17:41 0:00 [scsi_eh_2]
root 64 0.0 0.0 0 0 ? S< 17:41 0:00 [scsi_eh_3]
root 70 0.0 0.0 0 0 ? S< 17:41 0:00 [ksuspend_usbd]
root 71 0.0 0.0 0 0 ? S< 17:41 0:00 [khubd]
root 80 0.0 0.0 0 0 ? S< 17:41 0:00 [scsi_eh_4]
root 81 0.0 0.0 0 0 ? S< 17:41 0:00 [scsi_eh_5]
root 159 0.0 0.0 0 0 ? S< 17:41 0:00 [kjournald]
root 194 0.0 0.0 2452 1304 ? S<s 17:41 0:00 /sbin/udevd --daemon
root 1212 0.0 0.0 0 0 ? S< 17:41 0:00 [kmmcd]
root 1378 0.0 0.0 0 0 ? S< 17:41 0:00 [iwl3945/0]
root 1379 0.0 0.0 0 0 ? S< 17:41 0:00 [iwl3945/1]
root 1408 0.0 0.0 0 0 ? S< 17:41 0:00 [iwl3945]
root 1522 0.0 0.0 2320 348 ? Ss 17:41 0:00 /usr/sbin/irqbalance
root 1554 0.0 0.0 3904 1200 ? Ss 17:41 0:00 Comar
root 1681 0.0 0.0 3904 720 ? S 17:41 0:00 ComarRPC
root 1693 0.0 0.0 1556 608 ? Ss 17:41 0:00 /usr/sbin/syslogd -m 15
root 1696 0.0 0.0 1512 412 ? Ss 17:41 0:00 /usr/sbin/klogd -c 3 -2
root 1697 0.0 0.0 2168 948 ? Ss 17:41 0:00 /usr/sbin/hcid -s -f /etc/bluetooth/hcid.conf
root 1708 0.0 0.0 0 0 ? S< 17:41 0:00 [krfcommd]
root 1726 0.0 0.0 2008 712 tty3 Ss+ 17:41 0:00 /sbin/mingetty tty3
root 1727 0.0 0.0 2008 708 tty4 Ss+ 17:41 0:00 /sbin/mingetty tty4
root 1728 0.0 0.0 2008 708 tty5 Ss+ 17:41 0:00 /sbin/mingetty tty5
root 1729 0.0 0.0 2008 708 tty6 Ss+ 17:41 0:00 /sbin/mingetty tty6
root 1730 0.0 0.0 1508 512 ? Ss 17:41 0:00 /usr/sbin/acpid -c /etc/acpi/events
dbus 1797 0.0 0.0 2360 1000 ? Ss 17:41 0:00 /usr/bin/dbus-daemon --system
root 1846 0.0 0.1 8384 2196 ? Ssl 17:41 0:00 /usr/sbin/console-kit-daemon
hal 1939 0.0 0.1 5572 3948 ? Ss 17:42 0:00 /usr/sbin/hald --daemon=yes --use-syslog
root 1943 0.0 0.0 2980 1080 ? S 17:42 0:00 hald-runner
root 1950 0.5 1.7 214512 36420 ? Ssl 17:42 0:04 /opt/sun-jdk/bin/java -DConfigFile=/opt/zemberek-server/config/conf.ini -Djava.library.path=/opt/zemberek-server/lib -Xverify:none -Xms12m -Xmx14m -jar /opt/zemberek-server/zemberek_server-0.7.jar
root 1951 0.0 0.0 1780 692 ? Ss 17:42 0:00 /usr/sbin/cron
root 1952 0.0 0.0 10060 648 ? S<sl 17:42 0:00 /sbin/auditd
root 1954 0.0 0.0 9828 648 ? S<sl 17:42 0:00 /sbin/audispd
root 1955 0.0 0.0 0 0 ? S< 17:42 0:00 [kauditd]
root 1962 0.0 0.1 5812 2088 ? Ss 17:42 0:00 /usr/sbin/cupsd
avahi 1964 0.0 0.0 2656 1492 ? Ss 17:42 0:00 avahi-daemon: running [zangetsu.local]
avahi 1967 0.0 0.0 2516 456 ? Ss 17:42 0:00 avahi-daemon: chroot helper
root 2007 0.0 0.0 3072 1108 ? S 17:42 0:00 hald-addon-input: Listening on /dev/input/event8 /dev/input/event9 /dev/input/event0 /dev/input/event4 /dev/input/event5 /dev/input/event6 /dev/input/event7
hal 2039 0.0 0.0 2032 888 ? S 17:42 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
root 2044 0.0 0.0 3076 1024 ? S 17:42 0:00 hald-addon-storage: polling /dev/sr0 (every 2 sec)
root 2057 0.0 0.0 1640 468 ? Ss 17:42 0:00 /usr/sbin/avahi-dnsconfd -D
root 2071 0.0 0.0 3952 776 ? Ss 17:42 0:00 /usr/kde/3.5/bin/kdm
root 2073 3.5 1.2 30852 26084 tty7 RLs+ 17:42 0:30 /usr/bin/X -br -nolisten tcp :0 vt7 -auth /var/run/xauth/A:0-E3nV3y
root 2077 0.0 0.0 4668 1976 ? S 17:42 0:00 -:0
root 2080 0.0 0.0 3296 1360 ? Ss 17:42 0:00 /usr/sbin/wpa_supplicant -wuB -P/var/run/wpa_supplicant.pid
root 2109 0.0 0.0 1652 248 ? Ss 17:42 0:00 /sbin/dhcpcd -R -Y -N eth1 -t 120
root 2694 0.0 0.0 2008 708 tty2 Ss+ 17:43 0:00 /sbin/mingetty --noclear tty2
root 2758 0.0 0.0 2008 708 tty1 Ss+ 17:43 0:00 /sbin/mingetty --noclear tty1
caglar 2783 0.0 0.0 3016 1348 ? Ss 17:43 0:00 /bin/sh /usr/kde/3.5/bin/startkde
caglar 2812 0.0 0.0 2664 468 ? Ss 17:44 0:00 /usr/bin/gpg-agent --daemon
caglar 2815 0.0 0.0 3056 764 ? Ss 17:44 0:00 /usr/bin/ssh-agent -s
caglar 2832 0.0 0.0 2984 432 ? S 17:44 0:00 dbus-launch --sh-syntax --exit-with-session
caglar 2833 0.0 0.0 2228 864 ? Ss 17:44 0:00 /usr/bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session
root 2839 0.0 0.0 1360 148 ? S 17:44 0:00 start_kdeinit --new-startup +kcminit_startup
caglar 2840 0.0 0.3 25008 7800 ? Ss 17:44 0:00 kdeinit Running...
caglar 2843 0.0 0.1 24276 2788 ? S 17:44 0:00 dcopserver [kdeinit] --nosid
caglar 2845 0.0 0.3 26896 7720 ? S 17:44 0:00 klauncher [kdeinit] --new-startup
caglar 2847 0.0 0.7 33552 16424 ? S 17:44 0:00 kded [kdeinit] --new-startup
caglar 2852 0.0 0.0 1496 348 ? S 17:44 0:00 kwrapper ksmserver
caglar 2854 0.0 0.4 26656 9392 ? S 17:44 0:00 ksmserver [kdeinit]
caglar 2855 0.1 0.6 28584 12480 ? S 17:44 0:01 kwin [kdeinit] -session 10dfd5e1dc000119905582800000074630008_1201
caglar 2857 0.1 0.8 34436 17352 ? S 17:44 0:01 kdesktop [kdeinit]
caglar 2859 0.1 0.8 45892 17384 ? S 17:44 0:01 kicker [kdeinit]
caglar 2862 0.0 0.3 25560 6688 ? S 17:44 0:00 kio_file [kdeinit] file /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 2866 0.0 0.3 13736 7856 ? S 17:44 0:00 /usr/kde/3.5/bin/artsd -F 10 -S 4096 -s 3 -m artsmessage -c drkonqi -l 3 -f
caglar 2871 0.0 0.6 29552 12728 ? S 17:44 0:00 kmix [kdeinit] -session 10dfd5e1dc000118109216400000036490013_1201
caglar 2873 0.3 1.2 57188 26548 ? S 17:44 0:02 akregator -session 10dfd5e1dc000119737236400000038700014_1201016429_751575
caglar 2876 0.0 0.5 25972 10908 ? S 17:44 0:00 knazar -session 10dfd5e1dc000119738342100000051660022_1201016429_752054
caglar 2877 0.0 0.5 35540 11524 ? S 17:44 0:00 knotify [kdeinit]
caglar 2879 0.0 0.7 41988 14848 ? S 17:44 0:00 kgpg -session 10dfd5e1dc000119885454500000040010017_1201016429_751902
caglar 2881 0.4 0.7 29792 15976 ? S 17:44 0:03 yakuake -session 10dfd5e1dc000119949009100000068430023_1201016429_752567
caglar 2882 3.5 2.7 152560 57376 ? Sl 17:44 0:26 amarokapp -session 10dfd5e1dc000120001145300000022560015_1201016429_751762
caglar 2890 1.2 4.0 148500 83704 ? Sl 17:44 0:09 kmail -session 10dfd5e1dc000120100924600000022060011_1201016429_752344
caglar 2894 0.0 0.5 27664 11080 ? S 17:44 0:00 klipper [kdeinit]
caglar 2898 0.0 0.5 29504 11512 ? S 17:44 0:00 kpowersave [kdeinit]
caglar 3080 0.0 0.3 54032 7924 ? S 17:44 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3081 0.0 0.3 53912 7916 ? S 17:44 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3150 0.0 0.1 4136 2600 pts/2 Ss 17:44 0:00 /bin/bash
caglar 3236 0.0 0.4 16604 8576 ? S 17:44 0:00 /usr/libexec/notification-daemon
caglar 3273 0.0 0.3 27164 7028 ? S 17:44 0:00 kio_file [kdeinit] file /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3274 0.0 0.1 3692 2348 ? S 17:44 0:00 ruby /usr/kde/3.5/share/apps/amarok/scripts/score_default/score_default.rb
caglar 3341 0.0 0.3 62224 8172 ? S 17:46 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3343 0.0 0.3 61208 8116 ? S 17:46 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3344 0.0 0.3 54036 8076 ? S 17:46 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3345 0.0 0.3 53012 8072 ? S 17:46 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3347 0.0 0.3 54040 8120 ? S 17:46 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3348 0.0 0.3 62232 8100 ? S 17:46 0:00 kio_http [kdeinit] http /tmp/ksocket-caglar/klauncherTCaD9a.slave-
caglar 3897 0.0 0.8 56212 17004 ? S 17:50 0:00 /usr/bin/python /usr/kde/3.5/bin/network-applet
caglar 4265 0.0 0.0 2752 1308 ? S 17:53 0:00 /bin/sh /usr/bin/firefox
caglar 4267 1.1 1.6 131892 33644 ? Sl 17:53 0:01 /usr/lib/MozillaFirefox//firefox-bin
caglar 4271 0.0 0.1 4148 2392 ? S 17:53 0:00 /usr/libexec/gconfd-2 14
caglar 4300 0.0 0.4 54932 9120 ? S 17:54 0:00 kio_pop3 [kdeinit] pop3 /tmp/ksocket-caglar/klauncherTCaD9a.slave-
root 4316 0.0 0.0 2524 1200 pts/2 S 17:55 0:00 su -
root 4318 0.2 0.1 4788 3476 pts/2 S 17:55 0:00 -su
root 4342 0.1 0.1 3200 2116 pts/2 S+ 17:55 0:00 powertop
caglar 4345 0.1 0.1 4004 2540 pts/0 Ss 17:55 0:00 /bin/bash
root 4451 0.0 0.0 2524 1200 pts/0 S 17:55 0:00 su -
root 4453 0.3 0.1 4788 3448 pts/0 S 17:55 0:00 -su
caglar 4543 0.2 0.4 54064 9416 ? S 17:55 0:00 kio_smtp [kdeinit] smtp /tmp/ksocket-caglar/klauncherTCaD9a.slave-
root 4588 0.0 0.0 2272 964 pts/0 R+ 17:56 0:00 ps aux

Cheers
--
S.ÃaÄlar Onur <caglar@xxxxxxxxxxxxx>
http://cekirdek.pardus.org.tr/~caglar/

Linux is like living in a teepee. No Windows, no Gates and an Apache in house!
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Next message: Adrian Bunk: "Re: [PATCH for mm] Remove iBCS support"
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