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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] A clocksource question
> It looks like a variant > of that patch got into 2.6.33 (41d2e4949377) > according to http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.33.y.git;a=commit;h=41d2e4949377 there is a /proc/timer_list - here is mine with 2.6.33 and CONFIG_NOHZ active: Timer List Version: v0.5 HRTIMER_MAX_CLOCK_BASES: 2 now at 39700078385698 nsecs cpu: 0 clock 0: .base: ffff880008013f08 .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1268594403242758210 nsecs active timers: clock 1: .base: ffff880008013f48 .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ffff8800ec2f1948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, xend/14751 # expires at 39700088244281-39700088294281 nsecs [in 9858583 to 9908583 nsecs] #1: <ffff88011de87a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, kwin/3976 # expires at 39700088517904-39700088567904 nsecs [in 10132206 to 10182206 nsecs] #2: <ffff880114271a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, gkrellm/4029 # expires at 39700090903507-39700090953507 nsecs [in 12517809 to 12567809 nsecs] #3: <ffff880008013fe0>, tick_sched_timer, S:01, tick_nohz_stop_sched_tick, swapper/0 # expires at 39700319000000-39700319000000 nsecs [in 240614302 to 240614302 nsecs] #4: <ffff8801172f5a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, plasma- desktop/3980 # expires at 39700375492906-39700375841905 nsecs [in 297107208 to 297456207 nsecs] #5: <ffff88010e1cda78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, gkrellm/4030 # expires at 39700513816021-39700514369020 nsecs [in 435430323 to 435983322 nsecs] #6: <ffff88010e1cfa78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, gkrellm/4031 # expires at 39700928500172-39700929452171 nsecs [in 850114474 to 851066473 nsecs] #7: <ffff8801eeeb1948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, xend/2498 # expires at 39701136632456-39701138632455 nsecs [in 1058246758 to 1060246757 nsecs] #8: <ffff8801ecff7a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, avahi- daemon/2643 # expires at 39701630089942-39701658854941 nsecs [in 1551704244 to 1580469243 nsecs] #9: <ffff8801edd05948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, munin- node/2936 # expires at 39701811354852-39701813354851 nsecs [in 1732969154 to 1734969153 nsecs] #10: <ffff8801ead57a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, ntpd/1863 # expires at 39805530083909-39805630083909 nsecs [in 105451698211 to 105551698211 nsecs] #11: <ffff8800da159948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, rsyslogd/16096 # expires at 39911498142700-39911598142700 nsecs [in 211419757002 to 211519757002 nsecs] .expires_next : 39700088294281 nsecs .hres_active : 1 .nr_events : 17061828 .nr_retries : 3170 .nr_hangs : 0 .max_hang_time : 0 nsecs .nohz_mode : 2 .idle_tick : 39700077000000 nsecs .tick_stopped : 1 .idle_jiffies : 4334367373 .idle_calls : 54289068 .idle_sleeps : 34911450 .idle_entrytime : 39700077164622 nsecs .idle_waketime : 39700077116565 nsecs .idle_exittime : 39700074096546 nsecs .idle_sleeptime : 31394496198384 nsecs .last_jiffies : 4334367374 .next_jiffies : 4334367616 .idle_expires : 39700319000000 nsecs jiffies: 4334367375 cpu: 1 clock 0: .base: ffff880008026f08 .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1268594403242758210 nsecs active timers: clock 1: .base: ffff880008026f48 .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ffff880008026fe0>, tick_sched_timer, S:01, tick_nohz_restart_sched_tick, swapper/0 # expires at 39700079083333-39700079083333 nsecs [in 697635 to 697635 nsecs] #1: <ffff8801ebdb6468>, it_real_fn, S:01, do_setitimer, uml_switch/2130 # expires at 39700827086561-39700827086561 nsecs [in 748700863 to 748700863 nsecs] #2: <ffff88000396f948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, dirmngr/16013 # expires at 39700984969090-39700985969086 nsecs [in 906583392 to 907583388 nsecs] #3: <ffffffff816c1838>, sched_rt_period_timer, S:01, enqueue_task_rt, swapper/1 # expires at 39701000000000-39701000000000 nsecs [in 921614302 to 921614302 nsecs] #4: <ffff8801ee5df948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, mysqld/2346 # expires at 39702678123264-39702683123263 nsecs [in 2599737566 to 2604737565 nsecs] #5: <ffff8801eeea5948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, xend/2496 # expires at 100000015827667689-100000015927667689 nsecs [in 99960315749281991 to 99960315849281991 nsecs] .expires_next : 39700079083333 nsecs .hres_active : 1 .nr_events : 15140240 .nr_retries : 964 .nr_hangs : 1 .max_hang_time : 3968056 nsecs .nohz_mode : 2 .idle_tick : 39699985083333 nsecs .tick_stopped : 0 .idle_jiffies : 4334367281 .idle_calls : 20003807 .idle_sleeps : 5904872 .idle_entrytime : 39700078089128 nsecs .idle_waketime : 39700076359045 nsecs .idle_exittime : 39700076361140 nsecs .idle_sleeptime : 37710292484734 nsecs .last_jiffies : 4334367374 .next_jiffies : 4334367375 .idle_expires : 39701700000000 nsecs jiffies: 4334367375 cpu: 2 clock 0: .base: ffff880008039f08 .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1268594403242758210 nsecs active timers: clock 1: .base: ffff880008039f48 .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ffff880008039fe0>, tick_sched_timer, S:01, tick_nohz_restart_sched_tick, swapper/0 # expires at 39700079166666-39700079166666 nsecs [in 780968 to 780968 nsecs] #1: <ffff8801098aba78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, amarok/4040 # expires at 39700121985119-39700122084118 nsecs [in 43599421 to 43698420 nsecs] #2: <ffff880114253a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, klipper/4011 # expires at 39700334245968-39700335244967 nsecs [in 255860270 to 256859269 nsecs] #3: <ffff8801143f9a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, kmix/4018 # expires at 39700351305204-39700353303203 nsecs [in 272919506 to 274917505 nsecs] #4: <ffff8801ee6bfa78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, kontact/4039 # expires at 39700432386829-39700433385828 nsecs [in 354001131 to 355000130 nsecs] #5: <ffff8801ecd63948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, mysqld/2344 # expires at 39701067743916-39701068743915 nsecs [in 989358218 to 990358217 nsecs] #6: <ffff88011dd5ba78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, kded4/3950 # expires at 39701351300666-39701356298665 nsecs [in 1272914968 to 1277912967 nsecs] #7: <ffff8801098e1a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, akonadiserver/4049 # expires at 39701849232912-39701855575911 nsecs [in 1770847214 to 1777190213 nsecs] #8: <ffff88012091b948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, gpg- agent/3856 # expires at 39702757252653-39702760249600 nsecs [in 2678866955 to 2681863902 nsecs] #9: <ffff880109b03a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, akonadi_control/4047 # expires at 39707457215355-39707467205354 nsecs [in 7378829657 to 7388819656 nsecs] #10: <ffff8801edd43eb8>, hrtimer_wakeup, S:01, do_nanosleep, cron/2170 # expires at 39718231470880-39718231520880 nsecs [in 18153085182 to 18153135182 nsecs] #11: <ffff8800ec3f9d28>, hrtimer_wakeup, S:01, futex_wait_queue_me, rsyslogd/12234 # expires at 39733019433875-39733019483875 nsecs [in 32941048177 to 32941098177 nsecs] #12: <ffff8801ee14f948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, mdadm/2194 # expires at 40019833645109-40019933645109 nsecs [in 319755259411 to 319855259411 nsecs] .expires_next : 39700079166666 nsecs .hres_active : 1 .nr_events : 6718421 .nr_retries : 1069 .nr_hangs : 0 .max_hang_time : 0 nsecs .nohz_mode : 2 .idle_tick : 39700068166666 nsecs .tick_stopped : 0 .idle_jiffies : 4334367364 .idle_calls : 8721853 .idle_sleeps : 3768379 .idle_entrytime : 39700067749764 nsecs .idle_waketime : 39700076873579 nsecs .idle_exittime : 39700076874813 nsecs .idle_sleeptime : 37892101915060 nsecs .last_jiffies : 4334367364 .next_jiffies : 4334367500 .idle_expires : 39700203000000 nsecs jiffies: 4334367375 cpu: 3 clock 0: .base: ffff88000804cf08 .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1268594403242758210 nsecs active timers: clock 1: .base: ffff88000804cf48 .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ffff88000804cfe0>, tick_sched_timer, S:01, tick_nohz_restart_sched_tick, swapper/0 # expires at 39700079249999-39700079249999 nsecs [in 864301 to 864301 nsecs] #1: <ffff8801efc9f948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, init/1 # expires at 39702931328063-39702936328062 nsecs [in 2852942365 to 2857942364 nsecs] .expires_next : 39700079249999 nsecs .hres_active : 1 .nr_events : 7019712 .nr_retries : 703 .nr_hangs : 0 .max_hang_time : 0 nsecs .nohz_mode : 2 .idle_tick : 39697932249999 nsecs .tick_stopped : 0 .idle_jiffies : 4334365228 .idle_calls : 15211478 .idle_sleeps : 11625422 .idle_entrytime : 39699938261592 nsecs .idle_waketime : 39698025114890 nsecs .idle_exittime : 39698025116159 nsecs .idle_sleeptime : 37962384222924 nsecs .last_jiffies : 4334367235 .next_jiffies : 4334367236 .idle_expires : 39698029000000 nsecs jiffies: 4334367375 cpu: 4 clock 0: .base: ffff88000805ff08 .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1268594403242758210 nsecs active timers: clock 1: .base: ffff88000805ff48 .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ffff88000805ffe0>, tick_sched_timer, S:01, tick_nohz_restart_sched_tick, swapper/0 # expires at 39700079333332-39700079333332 nsecs [in 947634 to 947634 nsecs] #1: <ffff8801ecd77948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, mysqld/2345 # expires at 39700515448847-39700516448846 nsecs [in 437063149 to 438063148 nsecs] #2: <ffff8801ee069a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, hald- addon-stor/2731 # expires at 39700757370965-39700759288964 nsecs [in 678985267 to 680903266 nsecs] #3: <ffff8801ee5b9a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, hald- addon-stor/2732 # expires at 39700757368857-39700759355856 nsecs [in 678983159 to 680970158 nsecs] #4: <ffff8801eedcfa78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, krunner/4005 # expires at 39700965439836-39700966438835 nsecs [in 887054138 to 888053137 nsecs] #5: <ffff8801ee0ffa78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, hald- addon-stor/2730 # expires at 39701757375385-39701759293384 nsecs [in 1678989687 to 1680907686 nsecs] #6: <ffff8801ecc95948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, winbindd/2445 # expires at 39704287532303-39704317532302 nsecs [in 4209146605 to 4239146604 nsecs] #7: <ffff88011dc59a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, klauncher/3948 # expires at 39704522370930-39704532360929 nsecs [in 4443985232 to 4453975231 nsecs] #8: <ffff8801eed35a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, hald/2691 # expires at 39708757725862-39708787723861 nsecs [in 8679340164 to 8709338163 nsecs] #9: <ffff880120af7a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, console-kit-dae/3640 # expires at 39711757158054-39711787158053 nsecs [in 11678772356 to 11708772355 nsecs] #10: <ffff8801ec733468>, it_real_fn, S:01, do_setitimer, qmgr/2821 # expires at 39950643408313-39950643408313 nsecs [in 250565022615 to 250565022615 nsecs] #11: <ffff8801efd64868>, it_real_fn, S:01, do_setitimer, master/2812 # expires at 40010643498250-40010643498250 nsecs [in 310565112552 to 310565112552 nsecs] #12: <ffff8801ebe03eb8>, hrtimer_wakeup, S:01, do_nanosleep, atd/2149 # expires at 43215598718315-43215598768315 nsecs [in 3515520332617 to 3515520382617 nsecs] #13: <ffff8801ebdc2068>, it_real_fn, S:01, do_setitimer, pickup/15002 # expires at 45677643431329-45677643431329 nsecs [in 5977565045631 to 5977565045631 nsecs] .expires_next : 39700079333332 nsecs .hres_active : 1 .nr_events : 5181117 .nr_retries : 1352 .nr_hangs : 2 .max_hang_time : 31154440 nsecs .nohz_mode : 2 .idle_tick : 39698048333332 nsecs .tick_stopped : 0 .idle_jiffies : 4334365344 .idle_calls : 6885906 .idle_sleeps : 3874150 .idle_entrytime : 39700078338583 nsecs .idle_waketime : 39698051036847 nsecs .idle_exittime : 39698051038239 nsecs .idle_sleeptime : 37271606112519 nsecs .last_jiffies : 4334367375 .next_jiffies : 4334367411 .idle_expires : 39698691000000 nsecs jiffies: 4334367375 cpu: 5 clock 0: .base: ffff880008072f08 .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1268594403242758210 nsecs active timers: clock 1: .base: ffff880008072f48 .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <ffff8801ee259a78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, cupsd/2838 # expires at 39700188554200-39700199554199 nsecs [in 110168502 to 121168501 nsecs] #1: <ffff88011437da78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, kwalletd/4132 # expires at 39701350568747-39701355563746 nsecs [in 1272183049 to 1277178048 nsecs] #2: <ffff880008072fe0>, tick_sched_timer, S:01, tick_nohz_stop_sched_tick, swapper/0 # expires at 39701688000000-39701688000000 nsecs [in 1609614302 to 1609614302 nsecs] #3: <ffff8801ec4c5d28>, hrtimer_wakeup, S:01, futex_wait_queue_me, bacula- fd/3492 # expires at 39709742894693-39709742944693 nsecs [in 9664508995 to 9664558995 nsecs] #4: <ffff8801142fda78>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, korgac/4019 # expires at 39748359758573-39748419730572 nsecs [in 48281372875 to 48341344874 nsecs] #5: <ffff8801ee15b948>, hrtimer_wakeup, S:01, schedule_hrtimeout_range, rsyslogd/2096 # expires at 122711318146941-122711418146941 nsecs [in 83011239761243 to 83011339761243 nsecs] .expires_next : 39700199554199 nsecs .hres_active : 1 .nr_events : 3946402 .nr_retries : 883 .nr_hangs : 2 .max_hang_time : 2960096 nsecs .nohz_mode : 2 .idle_tick : 39699958416665 nsecs .tick_stopped : 1 .idle_jiffies : 4334367254 .idle_calls : 5770603 .idle_sleeps : 3654532 .idle_entrytime : 39699957423004 nsecs .idle_waketime : 39699921692874 nsecs .idle_exittime : 39699921694130 nsecs .idle_sleeptime : 37835103396410 nsecs .last_jiffies : 4334367254 .next_jiffies : 4334368985 .idle_expires : 39701688000000 nsecs jiffies: 4334367375 Tick Device: mode: 1 Per CPU device: 0 Clock Event Device: xen max_delta_ns: 4294967295 min_delta_ns: 100000 mult: 1 shift: 0 mode: 3 next_event: 39700088294281 nsecs set_next_event: vcpuop_set_next_event set_mode: vcpuop_set_mode event_handler: hrtimer_interrupt Tick Device: mode: 1 Per CPU device: 1 Clock Event Device: xen max_delta_ns: 4294967295 min_delta_ns: 100000 mult: 1 shift: 0 mode: 3 next_event: 39700079083333 nsecs set_next_event: vcpuop_set_next_event set_mode: vcpuop_set_mode event_handler: hrtimer_interrupt Tick Device: mode: 1 Per CPU device: 2 Clock Event Device: xen max_delta_ns: 4294967295 min_delta_ns: 100000 mult: 1 shift: 0 mode: 3 next_event: 39700079166666 nsecs set_next_event: vcpuop_set_next_event set_mode: vcpuop_set_mode event_handler: hrtimer_interrupt Tick Device: mode: 1 Per CPU device: 3 Clock Event Device: xen max_delta_ns: 4294967295 min_delta_ns: 100000 mult: 1 shift: 0 mode: 3 next_event: 39700079249999 nsecs set_next_event: vcpuop_set_next_event set_mode: vcpuop_set_mode event_handler: hrtimer_interrupt Tick Device: mode: 1 Per CPU device: 4 Clock Event Device: xen max_delta_ns: 4294967295 min_delta_ns: 100000 mult: 1 shift: 0 mode: 3 next_event: 39700079333332 nsecs set_next_event: vcpuop_set_next_event set_mode: vcpuop_set_mode event_handler: hrtimer_interrupt Tick Device: mode: 1 Per CPU device: 5 Clock Event Device: xen max_delta_ns: 4294967295 min_delta_ns: 100000 mult: 1 shift: 0 mode: 3 next_event: 39700199554199 nsecs set_next_event: vcpuop_set_next_event set_mode: vcpuop_set_mode event_handler: hrtimer_interrupt This is after some uptime with HVM guest active. As the ".nr_retries" indicate i still experience small hiccups, not long ones (but definitly longer than 100ms) but still quite annoying. CONFIG_NOHZ definitly helps, but not enough. Greetings Tobias _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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