* Arjan van de Ven <arjan@xxxxxxxxxxxxx> [2008-03-02 11:57:09]: [sniped] > > please show us powertop -d output; that way we can at least see sort of what > is going on... Here you go... [root@XXXX sv]# powertop -d PowerTOP 1.9 (C) 2007 Intel Corporation Collecting data for 15 seconds < Detailed C-state information is only available on Mobile CPUs (laptops) > P-states (frequencies) 2.40 Ghz 0.0% 2.13 Ghz 0.0% 1.87 Ghz 0.0% 1.60 Ghz 100.0% Wakeups-from-idle per second : 3.1 interval: 15.0s no ACPI power usage estimate available Top causes for wakeups: 41.4% ( 2.4) <interrupt> : eth0 17.2% ( 1.0) ip : bnx2_open (bnx2_timer) 9.2% ( 0.5) <kernel core> : neigh_table_init_no_netlink (neigh_periodic_timer) 3.4% ( 0.2) <kernel IPI> : function call interrupts 3.4% ( 0.2) init : schedule_timeout (process_timeout) 3.4% ( 0.2) python : schedule_timeout (process_timeout) 3.4% ( 0.2) <kernel core> : __netdev_watchdog_up (dev_watchdog) 3.4% ( 0.2) sendmail : schedule_timeout (process_timeout) 3.4% ( 0.2) <kernel core> : page_writeback_init (wb_timer_fn) 2.3% ( 0.1) <interrupt> : aacraid 2.3% ( 0.1) rc.sysinit : start_this_handle (commit_timeout) 1.1% ( 0.1) <kernel core> : sk_reset_timer (tcp_delack_timer) 1.1% ( 0.1) sshd : sk_reset_timer (tcp_write_timer) 1.1% ( 0.1) <kernel core> : cache_register (delayed_work_timer_fn) 1.1% ( 0.1) <kernel core> : init_nonfatal_mce_checker (delayed_work_timer_fn) 1.1% ( 0.1) crond : do_nanosleep (hrtimer_wakeup) 1.1% ( 0.1) <kernel core> : neigh_add_timer (neigh_timer_handler) Suggestion: increase the VM dirty writeback time from 5.00 to 15 seconds with: echo 1500 > /proc/sys/vm/dirty_writeback_centisecs This wakes the disk up less frequenty for background VM activity Suggestion: enable the noatime filesystem option by executing the following command: mount -o remount,noatime / or by pressing the T key noatime disables persistent access time of file accesses, which causes lots of disk IO. --Vaidy _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
