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Message-ID: <B2891EFD056565BBD4DBCE16@nimrod.local> Date: Sun, 08 May 2011 14:13:30 +0100 From: Alex Bligh <alex@...x.org.uk> To: paulmck@...ux.vnet.ibm.com cc: Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org, Alex Bligh <alex@...x.org.uk> Subject: Re: Scalability of interface creation and deletion >> The fact that increasing HZ masks the problem seems to imply that >> sychronize_sched() is waiting when it shouldn't be, as it suggests >> it's waiting for a context switch. But surely it shouldn't be >> waiting for context switch if all other cpu cores are idle? >> It knows that it (the caller) doesn't hold an rcu_read_lock, >> and presumably can see the other cpus are in the idle state, >> in which case surely it should return immediately? Distribution >> of latency in synchronize_sched() looks like this: >> >> 20-49 us 110 instances (27.500%) >> 50-99 us 45 instances (11.250%) > > Really? I am having a hard time believing this above two. Is this really > 2000-4999 us and 5000-9999 us? That would be much more believable, > and expected on a busy system with lots of context switching. Or on a > system with CONFIG_NO_HZ=n. Yes, really 20-49us and 50-99us, not ms. Raw data attached :-) I'm guessing there are circumstances where there is an early exit. $ fgrep HZ .config CONFIG_RCU_FAST_NO_HZ=y CONFIG_NO_HZ=y CONFIG_HZ_100=y # CONFIG_HZ_250 is not set # CONFIG_HZ_300 is not set # CONFIG_HZ_1000 is not set CONFIG_HZ=100 # CONFIG_MACHZ_WDT is not set > >> 5000-9999 us 5 instances (1.250%) > > This makes sense for a mostly-idle system with frequent short bursts > of work. > >> 10000-19999 us 33 instances (8.250%) > > This makes sense for a CONFIG_NO_HZ system that is idle, where there > is some amount of background work that is also using RCU grace periods. > >> 20000-49999 us 4 instances (1.000%) >> 50000-99999 us 191 instances (47.750%) >> 100000-199999 us 12 instances (3.000%) > > These last involve additional delays. Possibilities include long-running > irq handlers, SMIs, or NMIs. There is nothing much going on these systems (idle, no other users, just normal system daemons). Note this is with CONFIG_HZ=100 (which is the Ubuntu default). I wonder if that means you need to scale your expactations by a factor if 10 (i.e. you'd expect 50000-99999 for "a mostly-idle system with frequent short bursts of work." Interestingly there are quite a few of these on boot up. If this is a CONFIG_HZ thing, then setting it to 1000 would probably take half a second off bootup time. -- Alex Bligh May 8 09:47:31 nattytest kernel: [ 177.030197] synchronize_sched() in 66921 us May 8 09:47:31 nattytest kernel: [ 177.120085] synchronize_sched() in 89080 us May 8 09:47:31 nattytest kernel: [ 177.190910] synchronize_sched() in 46 us May 8 09:47:31 nattytest kernel: [ 177.210087] synchronize_sched() in 18686 us May 8 09:47:32 nattytest kernel: [ 177.400080] synchronize_sched() in 110609 us May 8 09:47:32 nattytest kernel: [ 177.480071] synchronize_sched() in 78550 us May 8 09:47:32 nattytest kernel: [ 177.550119] synchronize_sched() in 19087 us May 8 09:47:32 nattytest kernel: [ 177.551761] synchronize_sched() in 79 us May 8 09:47:32 nattytest kernel: [ 177.670085] synchronize_sched() in 60616 us May 8 09:47:32 nattytest kernel: [ 177.760075] synchronize_sched() in 88465 us May 8 09:47:32 nattytest kernel: [ 177.820999] synchronize_sched() in 45 us May 8 09:47:32 nattytest kernel: [ 177.840086] synchronize_sched() in 17579 us May 8 09:47:32 nattytest kernel: [ 177.970084] synchronize_sched() in 70925 us May 8 09:47:32 nattytest kernel: [ 178.050092] synchronize_sched() in 78477 us May 8 09:47:32 nattytest kernel: [ 178.101046] synchronize_sched() in 39 us May 8 09:47:32 nattytest kernel: [ 178.102574] synchronize_sched() in 48 us May 8 09:47:33 nattytest kernel: [ 178.230082] synchronize_sched() in 70966 us May 8 09:47:33 nattytest kernel: [ 178.310071] synchronize_sched() in 78503 us May 8 09:47:33 nattytest kernel: [ 178.371056] synchronize_sched() in 43 us May 8 09:47:33 nattytest kernel: [ 178.390094] synchronize_sched() in 17553 us May 8 09:47:33 nattytest kernel: [ 178.540084] synchronize_sched() in 70533 us May 8 09:47:33 nattytest kernel: [ 178.620074] synchronize_sched() in 79172 us May 8 09:47:33 nattytest kernel: [ 178.671124] synchronize_sched() in 57 us May 8 09:47:33 nattytest kernel: [ 178.672645] synchronize_sched() in 49 us May 8 09:47:33 nattytest kernel: [ 178.830106] synchronize_sched() in 100955 us May 8 09:47:33 nattytest kernel: [ 178.910084] synchronize_sched() in 78408 us May 8 09:47:33 nattytest kernel: [ 178.961090] synchronize_sched() in 43 us May 8 09:47:33 nattytest kernel: [ 178.962642] synchronize_sched() in 50 us May 8 09:47:33 nattytest kernel: [ 179.090088] synchronize_sched() in 71354 us May 8 09:47:33 nattytest kernel: [ 179.220071] synchronize_sched() in 128463 us May 8 09:47:34 nattytest kernel: [ 179.300867] synchronize_sched() in 52 us May 8 09:47:34 nattytest kernel: [ 179.302079] synchronize_sched() in 48 us May 8 09:47:34 nattytest kernel: [ 179.420085] synchronize_sched() in 61562 us May 8 09:47:34 nattytest kernel: [ 179.500093] synchronize_sched() in 78506 us May 8 09:47:34 nattytest kernel: [ 179.551048] synchronize_sched() in 42 us May 8 09:47:34 nattytest kernel: [ 179.552637] synchronize_sched() in 51 us May 8 09:47:34 nattytest kernel: [ 179.670088] synchronize_sched() in 61469 us May 8 09:47:34 nattytest kernel: [ 179.760078] synchronize_sched() in 88430 us May 8 09:47:34 nattytest kernel: [ 179.830918] synchronize_sched() in 44 us May 8 09:47:34 nattytest kernel: [ 179.850173] synchronize_sched() in 17783 us May 8 09:47:34 nattytest kernel: [ 180.080085] synchronize_sched() in 150585 us May 8 09:47:34 nattytest kernel: [ 180.160082] synchronize_sched() in 78381 us May 8 09:47:34 nattytest kernel: [ 180.211027] synchronize_sched() in 39 us May 8 09:47:34 nattytest kernel: [ 180.212186] synchronize_sched() in 52 us May 8 09:47:35 nattytest kernel: [ 180.320091] synchronize_sched() in 50520 us May 8 09:47:35 nattytest kernel: [ 180.400074] synchronize_sched() in 78525 us May 8 09:47:35 nattytest kernel: [ 180.451028] synchronize_sched() in 50 us May 8 09:47:35 nattytest kernel: [ 180.452100] synchronize_sched() in 30 us May 8 09:47:35 nattytest kernel: [ 180.570086] synchronize_sched() in 61211 us May 8 09:47:35 nattytest kernel: [ 180.650073] synchronize_sched() in 79145 us May 8 09:47:35 nattytest kernel: [ 180.701376] synchronize_sched() in 38 us May 8 09:47:35 nattytest kernel: [ 180.703490] synchronize_sched() in 57 us May 8 09:47:35 nattytest kernel: [ 180.820087] synchronize_sched() in 61483 us May 8 09:47:35 nattytest kernel: [ 180.910081] synchronize_sched() in 88485 us May 8 09:47:35 nattytest kernel: [ 180.965970] synchronize_sched() in 49 us May 8 09:47:35 nattytest kernel: [ 180.990091] synchronize_sched() in 22425 us May 8 09:47:35 nattytest kernel: [ 181.150084] synchronize_sched() in 71317 us May 8 09:47:36 nattytest kernel: [ 181.230074] synchronize_sched() in 78470 us May 8 09:47:36 nattytest kernel: [ 181.300099] synchronize_sched() in 18988 us May 8 09:47:36 nattytest kernel: [ 181.301637] synchronize_sched() in 46 us May 8 09:47:36 nattytest kernel: [ 181.420086] synchronize_sched() in 61240 us May 8 09:47:36 nattytest kernel: [ 181.500072] synchronize_sched() in 77682 us May 8 09:47:36 nattytest kernel: [ 181.551059] synchronize_sched() in 45 us May 8 09:47:36 nattytest kernel: [ 181.552546] synchronize_sched() in 29 us May 8 09:47:36 nattytest kernel: [ 181.670084] synchronize_sched() in 61612 us May 8 09:47:36 nattytest kernel: [ 181.750076] synchronize_sched() in 78513 us May 8 09:47:36 nattytest kernel: [ 181.801195] synchronize_sched() in 52 us May 8 09:47:36 nattytest kernel: [ 181.802805] synchronize_sched() in 69 us May 8 09:47:36 nattytest kernel: [ 181.920088] synchronize_sched() in 61998 us May 8 09:47:36 nattytest kernel: [ 182.000091] synchronize_sched() in 78539 us May 8 09:47:36 nattytest kernel: [ 182.051053] synchronize_sched() in 42 us May 8 09:47:36 nattytest kernel: [ 182.052595] synchronize_sched() in 29 us May 8 09:47:36 nattytest kernel: [ 182.170103] synchronize_sched() in 61607 us May 8 09:47:37 nattytest kernel: [ 182.260072] synchronize_sched() in 88460 us May 8 09:47:37 nattytest kernel: [ 182.331028] synchronize_sched() in 44 us May 8 09:47:37 nattytest kernel: [ 182.350096] synchronize_sched() in 17563 us May 8 09:47:37 nattytest kernel: [ 182.500085] synchronize_sched() in 71793 us May 8 09:47:37 nattytest kernel: [ 182.620085] synchronize_sched() in 118343 us May 8 09:47:37 nattytest kernel: [ 182.671024] synchronize_sched() in 39 us May 8 09:47:37 nattytest kernel: [ 182.672511] synchronize_sched() in 29 us May 8 09:47:37 nattytest kernel: [ 182.830096] synchronize_sched() in 101470 us May 8 09:47:37 nattytest kernel: [ 182.910081] synchronize_sched() in 78413 us May 8 09:47:37 nattytest kernel: [ 182.971056] synchronize_sched() in 43 us May 8 09:47:37 nattytest kernel: [ 182.972568] synchronize_sched() in 44 us May 8 09:47:37 nattytest kernel: [ 183.100084] synchronize_sched() in 60854 us May 8 09:47:37 nattytest kernel: [ 183.170097] synchronize_sched() in 68450 us May 8 09:47:37 nattytest kernel: [ 183.221081] synchronize_sched() in 40 us May 8 09:47:37 nattytest kernel: [ 183.222580] synchronize_sched() in 29 us May 8 09:47:38 nattytest kernel: [ 183.340082] synchronize_sched() in 61422 us May 8 09:47:38 nattytest kernel: [ 183.420078] synchronize_sched() in 79154 us May 8 09:47:38 nattytest kernel: [ 183.471003] synchronize_sched() in 41 us May 8 09:47:38 nattytest kernel: [ 183.472469] synchronize_sched() in 29 us May 8 09:47:38 nattytest kernel: [ 183.590095] synchronize_sched() in 61591 us May 8 09:47:38 nattytest kernel: [ 183.670069] synchronize_sched() in 78533 us May 8 09:47:38 nattytest kernel: [ 183.721106] synchronize_sched() in 43 us May 8 09:47:38 nattytest kernel: [ 183.722663] synchronize_sched() in 49 us May 8 09:47:38 nattytest kernel: [ 183.850094] synchronize_sched() in 71060 us May 8 09:47:38 nattytest kernel: [ 183.930080] synchronize_sched() in 78522 us May 8 09:47:38 nattytest kernel: [ 183.981040] synchronize_sched() in 44 us May 8 09:47:38 nattytest kernel: [ 183.990375] synchronize_sched() in 7913 us May 8 09:47:38 nattytest kernel: [ 184.150080] synchronize_sched() in 81568 us May 8 09:47:38 nattytest kernel: [ 184.220088] synchronize_sched() in 68481 us May 8 09:47:39 nattytest kernel: [ 184.281161] synchronize_sched() in 65 us May 8 09:47:39 nattytest kernel: [ 184.282733] synchronize_sched() in 60 us May 8 09:47:39 nattytest kernel: [ 184.400079] synchronize_sched() in 61791 us May 8 09:47:39 nattytest kernel: [ 184.480104] synchronize_sched() in 79181 us May 8 09:47:39 nattytest kernel: [ 184.550103] synchronize_sched() in 19063 us May 8 09:47:39 nattytest kernel: [ 184.551621] synchronize_sched() in 30 us May 8 09:47:39 nattytest kernel: [ 184.680083] synchronize_sched() in 71800 us May 8 09:47:39 nattytest kernel: [ 184.750084] synchronize_sched() in 69162 us May 8 09:47:39 nattytest kernel: [ 184.801153] synchronize_sched() in 51 us May 8 09:47:39 nattytest kernel: [ 184.802802] synchronize_sched() in 53 us May 8 09:47:39 nattytest kernel: [ 184.920091] synchronize_sched() in 61217 us May 8 09:47:39 nattytest kernel: [ 185.000074] synchronize_sched() in 79141 us May 8 09:47:39 nattytest kernel: [ 185.050985] synchronize_sched() in 40 us May 8 09:47:39 nattytest kernel: [ 185.052727] synchronize_sched() in 47 us May 8 09:47:39 nattytest kernel: [ 185.170087] synchronize_sched() in 62802 us May 8 09:47:40 nattytest kernel: [ 185.250074] synchronize_sched() in 78418 us May 8 09:47:40 nattytest kernel: [ 185.311022] synchronize_sched() in 40 us May 8 09:47:40 nattytest kernel: [ 185.312542] synchronize_sched() in 63 us May 8 09:47:40 nattytest kernel: [ 185.430111] synchronize_sched() in 61894 us May 8 09:47:40 nattytest kernel: [ 185.510073] synchronize_sched() in 78410 us May 8 09:47:40 nattytest kernel: [ 185.561055] synchronize_sched() in 58 us May 8 09:47:40 nattytest kernel: [ 185.562589] synchronize_sched() in 45 us May 8 09:47:40 nattytest kernel: [ 185.680091] synchronize_sched() in 62023 us May 8 09:47:40 nattytest kernel: [ 185.760076] synchronize_sched() in 78438 us May 8 09:47:40 nattytest kernel: [ 185.811063] synchronize_sched() in 45 us May 8 09:47:40 nattytest kernel: [ 185.812580] synchronize_sched() in 52 us May 8 09:47:40 nattytest kernel: [ 185.930089] synchronize_sched() in 61864 us May 8 09:47:40 nattytest kernel: [ 186.010072] synchronize_sched() in 78465 us May 8 09:47:40 nattytest kernel: [ 186.061141] synchronize_sched() in 44 us May 8 09:47:40 nattytest kernel: [ 186.062631] synchronize_sched() in 29 us May 8 09:47:40 nattytest kernel: [ 186.180078] synchronize_sched() in 61806 us May 8 09:47:41 nattytest kernel: [ 186.260074] synchronize_sched() in 78415 us May 8 09:47:41 nattytest kernel: [ 186.311073] synchronize_sched() in 43 us May 8 09:47:41 nattytest kernel: [ 186.312573] synchronize_sched() in 29 us May 8 09:47:41 nattytest kernel: [ 186.440083] synchronize_sched() in 72358 us May 8 09:47:41 nattytest kernel: [ 186.520071] synchronize_sched() in 78395 us May 8 09:47:41 nattytest kernel: [ 186.573068] synchronize_sched() in 66 us May 8 09:47:41 nattytest kernel: [ 186.590105] synchronize_sched() in 15551 us May 8 09:47:41 nattytest kernel: [ 186.740092] synchronize_sched() in 71884 us May 8 09:47:41 nattytest kernel: [ 186.830069] synchronize_sched() in 89123 us May 8 09:47:41 nattytest kernel: [ 186.890967] synchronize_sched() in 41 us May 8 09:47:41 nattytest kernel: [ 186.910091] synchronize_sched() in 18639 us May 8 09:47:41 nattytest kernel: [ 187.070078] synchronize_sched() in 82847 us May 8 09:47:41 nattytest kernel: [ 187.140090] synchronize_sched() in 68499 us May 8 09:47:41 nattytest kernel: [ 187.191148] synchronize_sched() in 57 us May 8 09:47:41 nattytest kernel: [ 187.192743] synchronize_sched() in 69 us May 8 09:47:42 nattytest kernel: [ 187.310087] synchronize_sched() in 63069 us May 8 09:47:42 nattytest kernel: [ 187.400076] synchronize_sched() in 88432 us May 8 09:47:42 nattytest kernel: [ 187.461521] synchronize_sched() in 57 us May 8 09:47:42 nattytest kernel: [ 187.480099] synchronize_sched() in 16493 us May 8 09:47:42 nattytest kernel: [ 187.640081] synchronize_sched() in 82269 us May 8 09:47:42 nattytest kernel: [ 187.710079] synchronize_sched() in 68389 us May 8 09:47:42 nattytest kernel: [ 187.761071] synchronize_sched() in 38 us May 8 09:47:42 nattytest kernel: [ 187.762623] synchronize_sched() in 67 us May 8 09:47:42 nattytest kernel: [ 187.880077] synchronize_sched() in 61847 us May 8 09:47:42 nattytest kernel: [ 187.960096] synchronize_sched() in 78450 us May 8 09:47:42 nattytest kernel: [ 188.011147] synchronize_sched() in 62 us May 8 09:47:42 nattytest kernel: [ 188.012617] synchronize_sched() in 29 us May 8 09:47:42 nattytest kernel: [ 188.130083] synchronize_sched() in 62431 us May 8 09:47:42 nattytest kernel: [ 188.210090] synchronize_sched() in 78447 us May 8 09:47:43 nattytest kernel: [ 188.261015] synchronize_sched() in 38 us May 8 09:47:43 nattytest kernel: [ 188.262491] synchronize_sched() in 29 us May 8 09:47:43 nattytest kernel: [ 188.380097] synchronize_sched() in 61923 us May 8 09:47:43 nattytest kernel: [ 188.470131] synchronize_sched() in 88521 us May 8 09:47:43 nattytest kernel: [ 188.531024] synchronize_sched() in 46 us May 8 09:47:43 nattytest kernel: [ 188.550087] synchronize_sched() in 17676 us May 8 09:47:43 nattytest kernel: [ 188.690085] synchronize_sched() in 71911 us May 8 09:47:43 nattytest kernel: [ 188.820071] synchronize_sched() in 128473 us May 8 09:47:43 nattytest kernel: [ 188.881032] synchronize_sched() in 42 us May 8 09:47:43 nattytest kernel: [ 188.900085] synchronize_sched() in 17588 us May 8 09:47:43 nattytest kernel: [ 189.080084] synchronize_sched() in 111945 us May 8 09:47:43 nattytest kernel: [ 189.170068] synchronize_sched() in 88449 us May 8 09:47:43 nattytest kernel: [ 189.221066] synchronize_sched() in 41 us May 8 09:47:44 nattytest kernel: [ 189.230257] synchronize_sched() in 7463 us May 8 09:47:44 nattytest kernel: [ 189.380093] synchronize_sched() in 71896 us May 8 09:47:44 nattytest kernel: [ 189.470093] synchronize_sched() in 88481 us May 8 09:47:44 nattytest kernel: [ 189.550883] synchronize_sched() in 43 us May 8 09:47:44 nattytest kernel: [ 189.552391] synchronize_sched() in 29 us May 8 09:47:44 nattytest kernel: [ 189.670085] synchronize_sched() in 61850 us May 8 09:47:44 nattytest kernel: [ 189.760080] synchronize_sched() in 88549 us May 8 09:47:44 nattytest kernel: [ 189.821014] synchronize_sched() in 44 us May 8 09:47:44 nattytest kernel: [ 189.850080] synchronize_sched() in 27628 us May 8 09:47:44 nattytest kernel: [ 189.990087] synchronize_sched() in 72251 us May 8 09:47:44 nattytest kernel: [ 190.080074] synchronize_sched() in 88486 us May 8 09:47:44 nattytest kernel: [ 190.150968] synchronize_sched() in 71 us May 8 09:47:44 nattytest kernel: [ 190.170092] synchronize_sched() in 17672 us May 8 09:47:45 nattytest kernel: [ 190.320088] synchronize_sched() in 71937 us May 8 09:47:45 nattytest kernel: [ 190.410068] synchronize_sched() in 89155 us May 8 09:47:45 nattytest kernel: [ 190.490882] synchronize_sched() in 40 us May 8 09:47:45 nattytest kernel: [ 190.492405] synchronize_sched() in 29 us May 8 09:47:45 nattytest kernel: [ 190.620103] synchronize_sched() in 62808 us May 8 09:47:45 nattytest kernel: [ 190.700108] synchronize_sched() in 78486 us May 8 09:47:45 nattytest kernel: [ 190.820119] synchronize_sched() in 69075 us May 8 09:47:45 nattytest kernel: [ 190.870096] synchronize_sched() in 48447 us May 8 09:47:45 nattytest kernel: [ 191.000082] synchronize_sched() in 62795 us May 8 09:47:45 nattytest kernel: [ 191.080082] synchronize_sched() in 78489 us May 8 09:47:45 nattytest kernel: [ 191.141021] synchronize_sched() in 61 us May 8 09:47:45 nattytest kernel: [ 191.160086] synchronize_sched() in 17596 us May 8 09:47:46 nattytest kernel: [ 191.310097] synchronize_sched() in 82089 us May 8 09:47:46 nattytest kernel: [ 191.390076] synchronize_sched() in 78427 us May 8 09:47:46 nattytest kernel: [ 191.451045] synchronize_sched() in 49 us May 8 09:47:46 nattytest kernel: [ 191.470088] synchronize_sched() in 17643 us May 8 09:47:46 nattytest kernel: [ 191.620095] synchronize_sched() in 72871 us May 8 09:47:46 nattytest kernel: [ 191.700072] synchronize_sched() in 79137 us May 8 09:47:46 nattytest kernel: [ 191.751087] synchronize_sched() in 40 us May 8 09:47:46 nattytest kernel: [ 191.752600] synchronize_sched() in 48 us May 8 09:47:46 nattytest kernel: [ 191.880092] synchronize_sched() in 72297 us May 8 09:47:46 nattytest kernel: [ 191.950076] synchronize_sched() in 69142 us May 8 09:47:46 nattytest kernel: [ 192.005349] synchronize_sched() in 54 us May 8 09:47:46 nattytest kernel: [ 192.006834] synchronize_sched() in 30 us May 8 09:47:46 nattytest kernel: [ 192.130091] synchronize_sched() in 72839 us May 8 09:47:46 nattytest kernel: [ 192.210069] synchronize_sched() in 78535 us May 8 09:47:47 nattytest kernel: [ 192.270973] synchronize_sched() in 43 us May 8 09:47:47 nattytest kernel: [ 192.300094] synchronize_sched() in 27592 us May 8 09:47:47 nattytest kernel: [ 192.450079] synchronize_sched() in 83072 us May 8 09:47:47 nattytest kernel: [ 192.520073] synchronize_sched() in 68499 us May 8 09:47:47 nattytest kernel: [ 192.571106] synchronize_sched() in 44 us May 8 09:47:47 nattytest kernel: [ 192.572585] synchronize_sched() in 29 us May 8 09:47:47 nattytest kernel: [ 192.700080] synchronize_sched() in 62670 us May 8 09:47:47 nattytest kernel: [ 192.820084] synchronize_sched() in 118509 us May 8 09:47:47 nattytest kernel: [ 192.871107] synchronize_sched() in 69 us May 8 09:47:47 nattytest kernel: [ 192.872611] synchronize_sched() in 29 us May 8 09:47:47 nattytest kernel: [ 192.990110] synchronize_sched() in 62742 us May 8 09:47:47 nattytest kernel: [ 193.080070] synchronize_sched() in 89147 us May 8 09:47:47 nattytest kernel: [ 193.150962] synchronize_sched() in 65 us May 8 09:47:47 nattytest kernel: [ 193.160285] synchronize_sched() in 8879 us May 8 09:47:48 nattytest kernel: [ 193.300097] synchronize_sched() in 72753 us May 8 09:47:48 nattytest kernel: [ 193.380075] synchronize_sched() in 78472 us May 8 09:47:48 nattytest kernel: [ 193.431029] synchronize_sched() in 41 us May 8 09:47:48 nattytest kernel: [ 193.432518] synchronize_sched() in 30 us May 8 09:47:48 nattytest kernel: [ 193.560081] synchronize_sched() in 72448 us May 8 09:47:48 nattytest kernel: [ 193.670073] synchronize_sched() in 108452 us May 8 09:47:48 nattytest kernel: [ 193.721098] synchronize_sched() in 49 us May 8 09:47:48 nattytest kernel: [ 193.722821] synchronize_sched() in 30 us May 8 09:47:48 nattytest kernel: [ 193.840075] synchronize_sched() in 62317 us May 8 09:47:48 nattytest kernel: [ 193.920070] synchronize_sched() in 78472 us May 8 09:47:48 nattytest kernel: [ 193.971073] synchronize_sched() in 43 us May 8 09:47:48 nattytest kernel: [ 193.972550] synchronize_sched() in 29 us May 8 09:47:48 nattytest kernel: [ 194.100088] synchronize_sched() in 72391 us May 8 09:47:48 nattytest kernel: [ 194.170082] synchronize_sched() in 69202 us May 8 09:47:48 nattytest kernel: [ 194.221053] synchronize_sched() in 40 us May 8 09:47:48 nattytest kernel: [ 194.222543] synchronize_sched() in 29 us May 8 09:47:49 nattytest kernel: [ 194.350082] synchronize_sched() in 72874 us May 8 09:47:49 nattytest kernel: [ 194.430068] synchronize_sched() in 78536 us May 8 09:47:49 nattytest kernel: [ 194.481167] synchronize_sched() in 70 us May 8 09:47:49 nattytest kernel: [ 194.500091] synchronize_sched() in 17486 us May 8 09:47:49 nattytest kernel: [ 194.640088] synchronize_sched() in 73012 us May 8 09:47:49 nattytest kernel: [ 194.730069] synchronize_sched() in 88519 us May 8 09:47:49 nattytest kernel: [ 194.781117] synchronize_sched() in 46 us May 8 09:47:49 nattytest kernel: [ 194.792950] synchronize_sched() in 10384 us May 8 09:47:49 nattytest kernel: [ 194.910126] synchronize_sched() in 63131 us May 8 09:47:49 nattytest kernel: [ 195.000088] synchronize_sched() in 88453 us May 8 09:47:49 nattytest kernel: [ 195.160080] synchronize_sched() in 79582 us May 8 09:47:50 nattytest kernel: [ 195.240073] synchronize_sched() in 79132 us May 8 09:47:50 nattytest kernel: [ 195.360124] synchronize_sched() in 62368 us May 8 09:47:50 nattytest kernel: [ 195.440096] synchronize_sched() in 79148 us May 8 09:47:50 nattytest kernel: [ 195.491063] synchronize_sched() in 53 us May 8 09:47:50 nattytest kernel: [ 195.492182] synchronize_sched() in 29 us May 8 09:47:50 nattytest kernel: [ 195.610085] synchronize_sched() in 62444 us May 8 09:47:50 nattytest kernel: [ 195.700078] synchronize_sched() in 89170 us May 8 09:47:50 nattytest kernel: [ 195.761011] synchronize_sched() in 57 us May 8 09:47:50 nattytest kernel: [ 195.780137] synchronize_sched() in 18587 us May 8 09:47:50 nattytest kernel: [ 195.920080] synchronize_sched() in 73194 us May 8 09:47:50 nattytest kernel: [ 196.000073] synchronize_sched() in 78456 us May 8 09:47:50 nattytest kernel: [ 196.051067] synchronize_sched() in 42 us May 8 09:47:50 nattytest kernel: [ 196.052613] synchronize_sched() in 44 us May 8 09:47:50 nattytest kernel: [ 196.170080] synchronize_sched() in 63040 us May 8 09:47:51 nattytest kernel: [ 196.250075] synchronize_sched() in 78420 us May 8 09:47:51 nattytest kernel: [ 196.301051] synchronize_sched() in 46 us May 8 09:47:51 nattytest kernel: [ 196.302527] synchronize_sched() in 29 us May 8 09:47:51 nattytest kernel: [ 196.420095] synchronize_sched() in 62701 us May 8 09:47:51 nattytest kernel: [ 196.500064] synchronize_sched() in 78448 us May 8 09:47:51 nattytest kernel: [ 196.551104] synchronize_sched() in 48 us May 8 09:47:51 nattytest kernel: [ 196.552631] synchronize_sched() in 49 us May 8 09:47:51 nattytest kernel: [ 196.670084] synchronize_sched() in 63111 us May 8 09:47:51 nattytest kernel: [ 196.750095] synchronize_sched() in 78464 us May 8 09:47:51 nattytest kernel: [ 196.801082] synchronize_sched() in 60 us May 8 09:47:51 nattytest kernel: [ 196.802616] synchronize_sched() in 43 us May 8 09:47:51 nattytest kernel: [ 196.930124] synchronize_sched() in 73010 us May 8 09:47:51 nattytest kernel: [ 197.010084] synchronize_sched() in 78359 us May 8 09:47:51 nattytest kernel: [ 197.071137] synchronize_sched() in 79 us May 8 09:47:51 nattytest kernel: [ 197.080320] synchronize_sched() in 7773 us May 8 09:47:52 nattytest kernel: [ 197.230086] synchronize_sched() in 83245 us May 8 09:47:52 nattytest kernel: [ 197.310075] synchronize_sched() in 78509 us May 8 09:47:52 nattytest kernel: [ 197.361050] synchronize_sched() in 44 us May 8 09:47:52 nattytest kernel: [ 197.380084] synchronize_sched() in 17591 us May 8 09:47:52 nattytest kernel: [ 197.530084] synchronize_sched() in 82999 us May 8 09:47:52 nattytest kernel: [ 197.610080] synchronize_sched() in 79162 us May 8 09:47:52 nattytest kernel: [ 197.680937] synchronize_sched() in 65 us May 8 09:47:52 nattytest kernel: [ 197.700096] synchronize_sched() in 18620 us May 8 09:47:52 nattytest kernel: [ 197.850141] synchronize_sched() in 73601 us May 8 09:47:52 nattytest kernel: [ 197.930091] synchronize_sched() in 78393 us May 8 09:47:52 nattytest kernel: [ 197.981050] synchronize_sched() in 39 us May 8 09:47:52 nattytest kernel: [ 197.982788] synchronize_sched() in 29 us May 8 09:47:52 nattytest kernel: [ 198.110084] synchronize_sched() in 72893 us May 8 09:47:52 nattytest kernel: [ 198.180072] synchronize_sched() in 69151 us May 8 09:47:53 nattytest kernel: [ 198.231098] synchronize_sched() in 50 us May 8 09:47:53 nattytest kernel: [ 198.232679] synchronize_sched() in 46 us May 8 09:47:53 nattytest kernel: [ 198.370084] synchronize_sched() in 72935 us May 8 09:47:53 nattytest kernel: [ 198.450068] synchronize_sched() in 78461 us May 8 09:47:53 nattytest kernel: [ 198.511077] synchronize_sched() in 77 us May 8 09:47:53 nattytest kernel: [ 198.530094] synchronize_sched() in 17512 us May 8 09:47:53 nattytest kernel: [ 198.670095] synchronize_sched() in 83122 us May 8 09:47:53 nattytest kernel: [ 198.740079] synchronize_sched() in 68453 us May 8 09:47:53 nattytest kernel: [ 198.801121] synchronize_sched() in 48 us May 8 09:47:53 nattytest kernel: [ 198.802600] synchronize_sched() in 29 us May 8 09:47:53 nattytest kernel: [ 198.920100] synchronize_sched() in 63392 us May 8 09:47:53 nattytest kernel: [ 199.000088] synchronize_sched() in 78482 us May 8 09:47:53 nattytest kernel: [ 199.070099] synchronize_sched() in 19013 us May 8 09:47:53 nattytest kernel: [ 199.071626] synchronize_sched() in 48 us May 8 09:47:53 nattytest kernel: [ 199.190083] synchronize_sched() in 63245 us May 8 09:47:54 nattytest kernel: [ 199.270075] synchronize_sched() in 78491 us May 8 09:47:54 nattytest kernel: [ 199.321088] synchronize_sched() in 42 us May 8 09:47:54 nattytest kernel: [ 199.322589] synchronize_sched() in 29 us May 8 09:47:54 nattytest kernel: [ 199.440101] synchronize_sched() in 63063 us May 8 09:47:54 nattytest kernel: [ 199.520073] synchronize_sched() in 78463 us May 8 09:47:54 nattytest kernel: [ 199.571056] synchronize_sched() in 49 us May 8 09:47:54 nattytest kernel: [ 199.572488] synchronize_sched() in 29 us May 8 09:47:54 nattytest kernel: [ 199.700083] synchronize_sched() in 73220 us May 8 09:47:54 nattytest kernel: [ 199.770096] synchronize_sched() in 68508 us May 8 09:47:54 nattytest kernel: [ 199.821090] synchronize_sched() in 50 us May 8 09:47:54 nattytest kernel: [ 199.822540] synchronize_sched() in 29 us May 8 09:47:54 nattytest kernel: [ 199.940084] synchronize_sched() in 63681 us May 8 09:47:54 nattytest kernel: [ 200.020067] synchronize_sched() in 78451 us May 8 09:47:54 nattytest kernel: [ 200.071095] synchronize_sched() in 41 us May 8 09:47:54 nattytest kernel: [ 200.072566] synchronize_sched() in 29 us May 8 09:47:54 nattytest kernel: [ 200.190089] synchronize_sched() in 63584 us May 8 09:47:55 nattytest kernel: [ 200.280076] synchronize_sched() in 89123 us May 8 09:47:55 nattytest kernel: [ 200.341011] synchronize_sched() in 61 us May 8 09:47:55 nattytest kernel: [ 200.360094] synchronize_sched() in 18527 us May 8 09:47:55 nattytest kernel: [ 200.520085] synchronize_sched() in 94129 us May 8 09:47:55 nattytest kernel: [ 200.670072] synchronize_sched() in 148512 us May 8 09:47:55 nattytest kernel: [ 200.730983] synchronize_sched() in 41 us May 8 09:47:55 nattytest kernel: [ 200.750355] synchronize_sched() in 17917 us May 8 09:47:55 nattytest kernel: [ 200.890082] synchronize_sched() in 83406 us May 8 09:47:55 nattytest kernel: [ 200.970072] synchronize_sched() in 78439 us May 8 09:47:55 nattytest kernel: [ 201.031034] synchronize_sched() in 45 us May 8 09:47:55 nattytest kernel: [ 201.050090] synchronize_sched() in 17555 us May 8 09:47:55 nattytest kernel: [ 201.200090] synchronize_sched() in 83318 us May 8 09:47:56 nattytest kernel: [ 201.270075] synchronize_sched() in 68468 us May 8 09:47:56 nattytest kernel: [ 201.330983] synchronize_sched() in 41 us May 8 09:47:56 nattytest kernel: [ 201.332487] synchronize_sched() in 62 us May 8 09:47:56 nattytest kernel: [ 201.450088] synchronize_sched() in 53772 us May 8 09:47:56 nattytest kernel: [ 201.530075] synchronize_sched() in 78437 us May 8 09:47:56 nattytest kernel: [ 201.590986] synchronize_sched() in 46 us May 8 09:47:56 nattytest kernel: [ 201.592134] synchronize_sched() in 29 us May 8 09:47:56 nattytest kernel: [ 201.710085] synchronize_sched() in 63551 us May 8 09:47:56 nattytest kernel: [ 201.830146] synchronize_sched() in 118553 us May 8 09:47:56 nattytest kernel: [ 201.891143] synchronize_sched() in 50 us May 8 09:47:56 nattytest kernel: [ 201.892712] synchronize_sched() in 55 us May 8 09:47:56 nattytest kernel: [ 202.010092] synchronize_sched() in 63446 us May 8 09:47:56 nattytest kernel: [ 202.090126] synchronize_sched() in 78477 us May 8 09:47:56 nattytest kernel: [ 202.141120] synchronize_sched() in 45 us May 8 09:47:56 nattytest kernel: [ 202.142867] synchronize_sched() in 30 us May 8 09:47:57 nattytest kernel: [ 202.260092] synchronize_sched() in 63271 us May 8 09:47:57 nattytest kernel: [ 202.340071] synchronize_sched() in 78474 us May 8 09:47:57 nattytest kernel: [ 202.391094] synchronize_sched() in 44 us May 8 09:47:57 nattytest kernel: [ 202.392581] synchronize_sched() in 29 us May 8 09:47:57 nattytest kernel: [ 202.510110] synchronize_sched() in 63718 us May 8 09:47:57 nattytest kernel: [ 202.600092] synchronize_sched() in 88434 us May 8 09:47:57 nattytest kernel: [ 202.661075] synchronize_sched() in 46 us May 8 09:47:57 nattytest kernel: [ 202.680091] synchronize_sched() in 17516 us May 8 09:47:57 nattytest kernel: [ 202.820083] synchronize_sched() in 83733 us May 8 09:47:57 nattytest kernel: [ 202.900067] synchronize_sched() in 78478 us May 8 09:47:57 nattytest kernel: [ 202.951062] synchronize_sched() in 43 us May 8 09:47:57 nattytest kernel: [ 202.960445] synchronize_sched() in 7921 us May 8 09:47:57 nattytest kernel: [ 203.100080] synchronize_sched() in 83496 us May 8 09:47:57 nattytest kernel: [ 203.170084] synchronize_sched() in 68474 us May 8 09:47:57 nattytest kernel: [ 203.221083] synchronize_sched() in 41 us May 8 09:47:57 nattytest kernel: [ 203.222692] synchronize_sched() in 68 us May 8 09:47:58 nattytest kernel: [ 203.350083] synchronize_sched() in 74062 us May 8 09:47:58 nattytest kernel: [ 203.430100] synchronize_sched() in 78468 us May 8 09:47:58 nattytest kernel: [ 203.491028] synchronize_sched() in 52 us May 8 09:47:58 nattytest kernel: [ 203.510086] synchronize_sched() in 17607 us May 8 09:47:58 nattytest kernel: [ 203.670080] synchronize_sched() in 83798 us May 8 09:47:58 nattytest kernel: [ 203.750080] synchronize_sched() in 78382 us May 8 09:47:58 nattytest kernel: [ 203.821032] synchronize_sched() in 48 us May 8 09:47:58 nattytest kernel: [ 203.840093] synchronize_sched() in 17608 us May 8 09:47:58 nattytest kernel: [ 203.990084] synchronize_sched() in 73664 us May 8 09:47:58 nattytest kernel: [ 204.080078] synchronize_sched() in 88391 us May 8 09:47:58 nattytest kernel: [ 204.141021] synchronize_sched() in 44 us May 8 09:47:58 nattytest kernel: [ 204.160083] synchronize_sched() in 17671 us May 8 09:47:59 nattytest kernel: [ 204.310086] synchronize_sched() in 83288 us May 8 09:47:59 nattytest kernel: [ 204.380074] synchronize_sched() in 69168 us May 8 09:47:59 nattytest kernel: [ 204.431059] synchronize_sched() in 67 us May 8 09:47:59 nattytest kernel: [ 204.432205] synchronize_sched() in 30 us May 8 09:47:59 nattytest kernel: [ 204.550147] synchronize_sched() in 54218 us May 8 09:47:59 nattytest kernel: [ 204.640079] synchronize_sched() in 88401 us May 8 09:47:59 nattytest kernel: [ 204.701062] synchronize_sched() in 48 us May 8 09:47:59 nattytest kernel: [ 204.720093] synchronize_sched() in 17508 us May 8 09:47:59 nattytest kernel: [ 204.850108] synchronize_sched() in 73968 us May 8 09:47:59 nattytest kernel: [ 204.940074] synchronize_sched() in 88489 us May 8 09:47:59 nattytest kernel: [ 205.011002] synchronize_sched() in 44 us May 8 09:47:59 nattytest kernel: [ 205.030104] synchronize_sched() in 17658 us May 8 09:47:59 nattytest kernel: [ 205.190091] synchronize_sched() in 83651 us May 8 09:48:00 nattytest kernel: [ 205.270094] synchronize_sched() in 78501 us May 8 09:48:00 nattytest kernel: [ 205.341000] synchronize_sched() in 65 us May 8 09:48:00 nattytest kernel: [ 205.360081] synchronize_sched() in 17640 us -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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