eas-dev May 2018

eas-dev@lists.linaro.org

8 participants
4 discussions

by Chris Redpath

Hi, Joel was looking at something else in android-4.14 wakeup path and he noticed that we have a difference in behavior for prefer_idle tasks when we're using find_best_target, so he asked if we could discuss that here. Behavior in android-4.9 and earlier ----------------------------------- When we find an idle CPU for a task which has the prefer_idle attribute, we immediately return that CPU from the energy-based wakeup CPU selection. This happens in slightly different places over the EAS and android versions but it is always true that we take the recommended idle CPU for tasks in this class. How that changed in android-4.14 -------------------------------- android-4.14 has two different wakeup paths, selected with a sched_feature FIND_BEST_TARGET. This defaults to true with the intent of preserving the previous behavior. Both paths are different, so I'll describe them below separately. The two paths however share some common code - the way we integrated EAS with the regular wakeup code is different in android-4.14. There were two reasons for doing this. 1. minimize the differences in select_task_rq_fair wrt mainline code 2. make better use of the per-sd overutilization flags Since we have per-sd overutilised flags, we attempt to perform an EAS wakeup at the highest non-overutilised sched_domain - meaning that we can still perform an energy-aware wakeup for small tasks inside a non-overutilized group of small CPUs while potentially other groups of CPUs are overutilized. The decision about attempting to use energy awareness is taken in wake_energy function at the top of strf - all the cases where we can't use energy-awareness are ruled out, and the decision about using find_idlest_cpu/EAS for prefer_idle tasks is also done here. If we are using energy aware wakeups, then we will find the highest non-overutilised SD to wake in. In all cases where we do an energy aware wakeup but don't find any suitable candidate CPUs we will go on to use find_idlest_cpu. android-4.14 sched_feat(FIND_BEST_TARGET) true wakeup path ---------------------------------------------------------- When FIND_BEST_TARGET sched feature is on (the default), we call find_best_target to populate the energy_env structure. This takes note of the prefer_idle flag and the task boost to change which task placement strategy will be used - the algorithm is the same as in previous versions of android. However in android-4.14 (unintentionally) the prefer_idle task placement is not immediately acted upon - when a prefer_idle task is placed, we will select the first idle CPU we see *but* this will become the target CPU and we will still perform an energy diff and select between prev/target based upon energy requirement. The open question is - now that we have realized that there is a different strategy in place, should we change it to be the same as the old version? I think that we should - it will be a simple change to use the idle cpu selected immediately without the energy diff. All we would need is to add something like this: --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7383,7 +7383,7 @@ static int find_energy_efficient_cpu(struct sched_domain *sd, } } else { int boosted = (schedtune_task_boost(p) > 0); - int prefer_idle; + int prefer_idle, target_cpu; /* * give compiler a hint that if sched_features @@ -7396,10 +7396,18 @@ static int find_energy_efficient_cpu(struct sched_domain *sd, eenv->max_cpu_count = EAS_CPU_BKP + 1; /* Find a cpu with sufficient capacity */ - eenv->cpu[EAS_CPU_NXT].cpu_id = find_best_target(p, + target_cpu = find_best_target(p, &eenv->cpu[EAS_CPU_BKP].cpu_id, boosted, prefer_idle); + /* immediately select idle CPUs for prefer-idle tasks */ + if (prefer_idle && target_cpu >= 0 && + idle_cpu(target_cpu))) + return target_cpu; + + /* place target into NEXT slot */ + eenv->cpu[EAS_CPU_NXT].cpu_id = target_cpu; + /* take note if no backup was found */ if (eenv->cpu[EAS_CPU_BKP].cpu_id < 0) eenv->max_cpu_count = EAS_CPU_BKP; It could be the case that there are energy advantages to performing an energy diff for prefer_idle tasks, we've tried a few times to come up with a way to use lower-energy CPUs for these tasks where possible (for cases like full-screen video playback or screen-off audio playback) without harming the interactive response, but we haven't managed to come up with anything which doesn't need per-platform tuning which isn't really suitable. The underlying requirement for these prefer_idle tasks is that they should ideally not be preempted as they are likely to be part of the critical frame drawing path. We should also note that the EAS_PREFER_IDLE sched_feature potentially also has an effect on this - if we are using find_best_target and we do not have EAS_PREFER_IDLE set to true (true is the default), then we don't pass the prefer_idle status of the task to find_best_target - however if EAS_PREFER_IDLE is not true, we should have avoided entering find_energy_efficient_cpu in the first place. To be complete, there is also a further sched_feat for task placement which controls how we evaluate the energy requirement for a task. If FBT_STRICT_ORDER is on (the default), we will select the first CPU we find which saves energy compared to the prev_cpu. This matches previous versions of android. We have been experimenting with selecting the most efficient out of the target/backup CPUs provided by find_best_target, if FBT_STRICT_ORDER is false this is what the scheduler will do. In testing there isn't really a clear winner out of these options, so I added the sched feature so users could play with the options easily on their platforms without code changes. android-4.14 sched_feat(FIND_BEST_TARGET) false wakeup path ----------------------------------------------------------- This uses the brute-force placement strategy from the pre-simplified-EM mainline EAS patch set, inside the android energy diff algorithm. In android, we collect all the potential CPU placement options in a data structure, and then evaluate the energy for all of them at each sched_domain traversal level. This is done to avoid visiting each domain & group more than once. Other than the switch to the new energy calculation method, the energy required is still calculated for every allowable CPU and then the option which has the lowest overall consumption is selected. When it comes to dealing with prefer_idle tasks, there is another optional behaviour in this mode. If you have sched_feat(EAS_PREFER_IDLE) set to true (the default), then prefer_idle tasks have no special treatment in the energy-aware wakeup path. This means they will get the lowest-energy option with no regard to idleness. However, if EAS_PREFER_IDLE is false (i.e. don't use EAS for prefer-idle tasks) then we route these tasks through the slow path wakeup code - the decision is made inside wake_energy, which propagates through to calling find_idlest_cpu instead of find_energy_efficient_cpu. If the find_best_target feature FBT_STRICT_ORDER is true (the default) then the first CPU which saves energy compared to default will be selected rather than the most efficient. When combined with the brute force selection algorithm, this will result in the lowest-numbered cpu which saves energy over the prev_cpu being selected. This is not the way that the brute force (mainline-alike) placement is intended to work, so when using brute force (FIND_BEST_TARGET=false) one should also turn off strict ordering (FBT_STRICT_ORDER=false) *and* opt out of using EAS for prefer_idle tasks (EAS_PREFER_IDLE=false). --Chris

6 years

Android kernel 4.14: warning in walt_fixup_busy_time()

by Leo Yan

Hi all, I can reproduce the warning from WALT function walt_fixup_busy_time() in Android kernel 4.14 on Hikey960 board. The detailed log is as below. To trigger this issue, I usually reboot the board for multiple times: 'while true; do adb reboot; sleep 30; done' and at the boot time this issue can be reproduced. Before dig into this, I share the log to check in case we have the fixing yet for it. Thanks, Leo Yan --- log --- console:/ $ [ 9.260172] read descriptors [ 9.263096] read strings [ 9.267978] wlcore: wl18xx HW: 183x or 180x, PG 2.2 (ROM 0x11) [ 9.272518] wlcore: loaded [ 9.348146] random: crng init done [ 9.351604] random: 7 urandom warning(s) missed due to ratelimiting [ 10.079584] configfs-gadget gadget: high-speed config #1: b [ 10.189563] ------------[ cut here ]------------ [ 10.194275] WARNING: CPU: 0 PID: 0 at kernel/sched/walt.c:888 walt_fixup_busy_time+0x3a4/0x418 [ 10.202976] Modules linked in: [ 10.206069] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G S 4.14.41-01140-gd1e4c9f #199 [ 10.214856] Hardware name: HiKey960 (DT) [ 10.218816] task: ffffff8009829700 task.stack: ffffff8009810000 [ 10.224798] PC is at walt_fixup_busy_time+0x3a4/0x418 [ 10.229912] LR is at walt_fixup_busy_time+0x108/0x418 [ 10.235031] pc : [<ffffff8008141844>] lr : [<ffffff80081415a8>] pstate: 004001c5 [ 10.242516] sp : ffffff80080039c0 [ 10.245871] x29: ffffff80080039c0 x28: 000000025f283b70 [ 10.251260] x27: ffffff8009426000 x26: 000000025f2896fe [ 10.256648] x25: ffffff800981a0ec x24: ffffff800981a0ec [ 10.262037] x23: ffffff800981ae08 x22: ffffff8009426880 [ 10.267425] x21: ffffffc21ff23880 x20: ffffffc21ff4f880 [ 10.272811] x19: ffffffc211a58080 x18: 0000000000000000 [ 10.278198] x17: 000000743dc998e0 x16: ffffff80082ba168 [ 10.283586] x15: 0000000000000000 x14: 0000000200000000 [ 10.288973] x13: 0000000000000013 x12: 0000000000000688 [ 10.294361] x11: 0000000000000040 x10: ffffffc211c00268 [ 10.299749] x9 : ffffffc211c00458 x8 : ffffffc210347800 [ 10.305136] x7 : ffffffc209978c00 x6 : 0000000001ac37ab [ 10.310523] x5 : 0000000000000000 x4 : ffffffc212221080 [ 10.315911] x3 : 0000000000000000 x2 : ffffff800981a0ec [ 10.321298] x1 : 0000000000568aff x0 : ffffffffffff1f1d [ 10.326689] [ 10.326689] X0: 0xffffffffffff1e9d: [ 10.331715] 1e9c [ 10.331730] ******** [ 10.333681] ******** [ 10.335983] ******** [ 10.338284] ******** [ 10.340586] ******** [ 10.342888] ******** [ 10.345190] ******** [ 10.347491] ******** [ 10.349791] [ 10.353593] 1ebc [ 10.353601] ******** [ 10.355551] ******** [ 10.357852] ******** [ 10.360154] ******** [ 10.362456] ******** [ 10.364759] ******** [ 10.367060] ******** [ 10.369361] ******** [ 10.371661] [ 10.375463] 1edc [ 10.375471] ******** [ 10.377422] ******** [ 10.379722] ******** [ 10.382025] ******** [ 10.384327] ******** [ 10.386628] ******** [ 10.388930] ******** [ 10.391231] ******** [ 10.393531] [ 10.397333] 1efc [ 10.397341] ******** [ 10.399291] ******** [ 10.401592] ******** [ 10.403894] ******** [ 10.406195] ******** [ 10.408496] ******** [ 10.410797] ******** [ 10.413098] ******** [ 10.415398] [ 10.419200] 1f1c [ 10.419208] ******** [ 10.421158] ******** [ 10.423459] ******** [ 10.425761] ******** [ 10.428064] ******** [ 10.430365] ******** [ 10.432666] ******** [ 10.434968] ******** [ 10.437267] [ 10.441069] 1f3c [ 10.441077] ******** [ 10.443027] ******** [ 10.445329] ******** [ 10.447631] ******** [ 10.449932] ******** [ 10.452234] ******** [ 10.454535] ******** [ 10.456838] ******** [ 10.459138] [ 10.462939] 1f5c [ 10.462948] ******** [ 10.464898] ******** [ 10.467200] ******** [ 10.469501] ******** [ 10.471802] ******** [ 10.474104] ******** [ 10.476406] ******** [ 10.478707] ******** [ 10.481007] [ 10.484808] 1f7c [ 10.484816] ******** [ 10.486766] ******** [ 10.489068] ******** [ 10.491370] ******** [ 10.493671] ******** [ 10.495972] ******** [ 10.498275] ******** [ 10.500576] ******** [ 10.502876] [ 10.506677] 1f9c [ 10.506685] ******** [ 10.508635] ******** [ 10.510937] ******** [ 10.513238] ******** [ 10.515540] ******** [ 10.517841] ******** [ 10.520143] ******** [ 10.522444] ******** [ 10.524744] [ 10.528550] [ 10.528550] X4: 0xffffffc212221000: [ 10.533575] 1000 [ 10.533583] ffffffff [ 10.535533] ffffefff [ 10.537834] ffdfffff [ 10.540135] ffff7dff [ 10.542436] ffffffff [ 10.544738] ffffffff [ 10.547038] f7ffdfff [ 10.549339] f7ffffff [ 10.551639] [ 10.555441] 1020 [ 10.555448] ffffffff [ 10.557397] ffffffff [ 10.559698] ffffffff [ 10.561998] ffffffff [ 10.564300] ffffffff [ 10.566601] fffdffff [ 10.568901] fff7dfff [ 10.571203] ffffffdf [ 10.573502] [ 10.577303] 1040 [ 10.577311] ffffffff [ 10.579260] f7ffffff [ 10.581561] ffffffff [ 10.583863] ffffffff [ 10.586164] fffbffff [ 10.588465] ffffffef [ 10.590766] dfffffff [ 10.593067] ffffffff [ 10.595366] [ 10.599167] 1060 [ 10.599175] ffdffffe [ 10.601123] dfffffdf [ 10.603424] ffffffff [ 10.605725] ffffffff [ 10.608025] ffffffff [ 10.610326] ffffffff [ 10.612627] ffffffff [ 10.614928] fffeffff [ 10.617228] [ 10.621030] 1080 [ 10.621037] 00000020 [ 10.622987] 00000000 [ 10.625288] ffffffff [ 10.627588] 0000007f [ 10.629889] 019b3000 [ 10.632189] 00000000 [ 10.634490] 00010002 [ 10.636791] 00000000 [ 10.639091] [ 10.642892] 10a0 [ 10.642899] 00000000 [ 10.644849] 00000000 [ 10.647150] 09ad0000 [ 10.649452] ffffff80 [ 10.651753] 00000002 [ 10.654054] 00200042 [ 10.656354] 00000000 [ 10.658655] 00000000 [ 10.660954] [ 10.664757] 10c0 [ 10.664765] 00000000 [ 10.666714] 00000000 [ 10.669016] 00000001 [ 10.671317] 00000002 [ 10.673618] 00000003 [ 10.675920] 00000000 [ 10.678220] fffee3fd [ 10.680521] 00000000 [ 10.682820] [ 10.686622] 10e0 [ 10.686630] 048ff000 [ 10.688579] ffffffc2 [ 10.690880] 00000002 [ 10.693180] 00000001 [ 10.695480] 00000078 [ 10.697781] 00000078 [ 10.700082] 00000078 [ 10.702383] 00000000 [ 10.704682] [ 10.708489] [ 10.708489] X7: 0xffffffc209978b80: [ 10.713515] 8b80 [ 10.713522] 00000000 [ 10.715472] 00000000 [ 10.717773] 00000000 [ 10.720074] 00000000 [ 10.722375] 00000000 [ 10.724675] 00000000 [ 10.726976] 00000000 [ 10.729276] 00000000 [ 10.731575] [ 10.735376] 8ba0 [ 10.735383] 00000000 [ 10.737332] 00000000 [ 10.739632] 00000000 [ 10.741934] 00000000 [ 10.744233] 00000000 [ 10.746534] 00000000 [ 10.748834] 00000000 [ 10.751135] 00000000 [ 10.753434] [ 10.757236] 8bc0 [ 10.757244] 00000000 [ 10.759193] 00000000 [ 10.761494] 00000000 [ 10.763794] 00000000 [ 10.766095] 00000000 [ 10.768396] 00000000 [ 10.770696] 00000000 [ 10.772997] 00000000 [ 10.775296] [ 10.779096] 8be0 [ 10.779104] 00000000 [ 10.781054] 00000000 [ 10.783354] 00000000 [ 10.785655] 00000000 [ 10.787956] 00000000 [ 10.790256] 00000000 [ 10.792556] 00000000 [ 10.794857] 00000000 [ 10.797157] [ 10.800957] 8c00 [ 10.800965] 087290c0 [ 10.802915] ffffffbf [ 10.805216] 00001000 [ 10.807517] 00000000 [ 10.809818] 08729080 [ 10.812119] ffffffbf [ 10.814420] 00001000 [ 10.816720] 00000000 [ 10.819020] [ 10.822822] 8c20 [ 10.822829] 08729040 [ 10.824779] ffffffbf [ 10.827079] 00001000 [ 10.829380] 00000000 [ 10.831681] 08729000 [ 10.833981] ffffffbf [ 10.836282] 00001000 [ 10.838583] 00000000 [ 10.840882] [ 10.844683] 8c40 [ 10.844691] 08728fc0 [ 10.846640] ffffffbf [ 10.848941] 00001000 [ 10.851242] 00000000 [ 10.853542] 08728f80 [ 10.855844] ffffffbf [ 10.858144] 00001000 [ 10.860445] 00000000 [ 10.862744] [ 10.866545] 8c60 [ 10.866553] 08728f40 [ 10.868503] ffffffbf [ 10.870804] 00001000 [ 10.873105] 00000000 [ 10.875406] 08728f00 [ 10.877707] ffffffbf [ 10.880007] 00001000 [ 10.882308] 00000000 [ 10.884608] [ 10.888413] [ 10.888413] X8: 0xffffffc210347780: [ 10.893439] 7780 [ 10.893446] 00000000 [ 10.895396] 00000000 [ 10.897696] 00000000 [ 10.899997] 00000000 [ 10.902298] 00000000 [ 10.904598] 00000000 [ 10.906900] 00000000 [ 10.909200] 00000000 [ 10.911499] [ 10.915301] 77a0 [ 10.915308] 00000000 [ 10.917257] 00000000 [ 10.919557] 00000000 [ 10.921859] 00000000 [ 10.924160] 00000000 [ 10.926460] 00000000 [ 10.928761] 00000000 [ 10.931061] 00000000 [ 10.933361] [ 10.937163] 77c0 [ 10.937170] 00000000 [ 10.939120] 00000000 [ 10.941421] 00000000 [ 10.943722] 00000000 [ 10.946022] 00000000 [ 10.948323] 00000000 [ 10.950623] 00000000 [ 10.952923] 00000000 [ 10.955223] [ 10.959025] 77e0 [ 10.959032] 00000000 [ 10.960982] 00000000 [ 10.963282] 00000000 [ 10.965583] 00000000 [ 10.967883] 00000000 [ 10.970183] 00000000 [ 10.972484] 00000000 [ 10.974785] 00000000 [ 10.977084] [ 10.980884] 7800 [ 10.980892] 10341800 [ 10.982841] ffffffc2 [ 10.985142] 11522800 [ 10.987443] ffffffc2 [ 10.989743] 10340d00 [ 10.992044] ffffffc2 [ 10.994345] 00000008 [ 10.996646] 00000000 [ 10.998945] [ 11.002746] 7820 [ 11.002754] 00000010 [ 11.004703] 00000000 [ 11.007004] 00000020 [ 11.009305] 0000007d [ 11.011606] 00000001 [ 11.013907] 00000002 [ 11.016207] 00000001 [ 11.018508] 00000000 [ 11.020807] [ 11.024608] 7840 [ 11.024616] 00000000 [ 11.026566] 00000000 [ 11.028866] 00000000 [ 11.031167] 00000000 [ 11.033468] 0000107f [ 11.035769] 00000001 [ 11.038069] fffee4fa [ 11.040371] 00000000 [ 11.042671] [ 11.046473] 7860 [ 11.046481] 00000010 [ 11.048430] 00000000 [ 11.050730] 000086b6 [ 11.053031] 00000000 [ 11.055331] fffee5b6 [ 11.057632] 00000000 [ 11.059932] 00000000 [ 11.062233] 00000000 [ 11.064533] [ 11.068336] [ 11.068336] X9: 0xffffffc211c003d8: [ 11.073361] 03d8 [ 11.073370] 114cec00 [ 11.075319] ffffffc2 [ 11.077620] 114cea00 [ 11.079920] ffffffc2 [ 11.082221] 114ce800 [ 11.084522] ffffffc2 [ 11.086823] 114ce600 [ 11.089124] ffffffc2 [ 11.091423] [ 11.095225] 03f8 [ 11.095232] 114ce400 [ 11.097181] ffffffc2 [ 11.099482] 114ce200 [ 11.101783] ffffffc2 [ 11.104084] 114ce000 [ 11.106385] ffffffc2 [ 11.108686] 11514e00 [ 11.110987] ffffffc2 [ 11.113288] [ 11.117088] 0418 [ 11.117095] 11514c00 [ 11.119044] ffffffc2 [ 11.121346] 11514a00 [ 11.123647] ffffffc2 [ 11.125948] 11514600 [ 11.128250] ffffffc2 [ 11.130551] 11514400 [ 11.132852] ffffffc2 [ 11.135151] [ 11.138953] 0438 [ 11.138960] 11514200 [ 11.140910] ffffffc2 [ 11.143211] 11514000 [ 11.145513] ffffffc2 [ 11.147814] 11547e00 [ 11.150115] ffffffc2 [ 11.152415] 11547c00 [ 11.154716] ffffffc2 [ 11.157016] [ 11.160817] 0458 [ 11.160825] 11547a00 [ 11.162773] ffffffc2 [ 11.165075] 11547800 [ 11.167375] ffffffc2 [ 11.169676] 00000000 [ 11.171976] 00000000 [ 11.174277] 00000000 [ 11.176577] 00000000 [ 11.178877] [ 11.182679] 0478 [ 11.182686] 00000000 [ 11.184636] 00000000 [ 11.186936] 00000000 [ 11.189238] 00000000 [ 11.191539] 11c006c0 [ 11.193839] ffffffc2 [ 11.196142] 00000000 [ 11.198442] 00000000 [ 11.200741] [ 11.204543] 0498 [ 11.204550] 11c00498 [ 11.206501] ffffffc2 [ 11.208801] 11c00498 [ 11.211102] ffffffc2 [ 11.213402] 00000000 [ 11.215703] 00000000 [ 11.218003] 00000000 [ 11.220304] 00000000 [ 11.222603] [ 11.226405] 04b8 [ 11.226412] 00000000 [ 11.228361] 00000000 [ 11.230662] 00000000 [ 11.232964] 00000000 [ 11.235264] 00000000 [ 11.237565] 00000000 [ 11.239865] 00000000 [ 11.242166] 00000000 [ 11.244465] [ 11.248269] [ 11.248269] X10: 0xffffffc211c001e8: [ 11.253381] 01e8 [ 11.253389] 00000000 [ 11.255340] 00000000 [ 11.257640] 00000000 [ 11.259941] 00000000 [ 11.262242] 00000000 [ 11.264542] 00000000 [ 11.266843] 00000000 [ 11.269144] 00000000 [ 11.271444] [ 11.275245] 0208 [ 11.275252] 00000000 [ 11.277202] 00000000 [ 11.279502] 00000000 [ 11.281803] 00000000 [ 11.284104] 00000000 [ 11.286405] 00000000 [ 11.288705] 00000000 [ 11.291006] 00000000 [ 11.293305] [ 11.297106] 0228 [ 11.297114] fffc0000 [ 11.299063] ffffffff [ 11.301364] 00000000 [ 11.303665] 00000000 [ 11.305966] 00000000 [ 11.308267] 00000000 [ 11.310567] 003f0000 [ 11.312869] 00000000 [ 11.315168] [ 11.318969] 0248 [ 11.318977] 11c18240 [ 11.320926] ffffffc2 [ 11.323227] 0984b500 [ 11.325528] ffffff80 [ 11.327829] 11c00258 [ 11.330130] ffffffc2 [ 11.332430] 11c00258 [ 11.334731] ffffffc2 [ 11.337031] [ 11.340832] 0268 [ 11.340839] 00000000 [ 11.342789] 00000000 [ 11.345089] 12117200 [ 11.347390] ffffffc2 [ 11.349690] 12117400 [ 11.351991] ffffffc2 [ 11.354293] 12117600 [ 11.356594] ffffffc2 [ 11.358893] [ 11.362694] 0288 [ 11.362702] 12117800 [ 11.364651] ffffffc2 [ 11.366952] 12117a00 [ 11.369252] ffffffc2 [ 11.371554] 12117c00 [ 11.373854] ffffffc2 [ 11.376156] 11a4cc00 [ 11.378456] ffffffc2 [ 11.380755] [ 11.384556] 02a8 [ 11.384563] 11a4ca00 [ 11.386513] ffffffc2 [ 11.388813] 11a4c800 [ 11.391113] ffffffc2 [ 11.393415] 11a4c600 [ 11.395716] ffffffc2 [ 11.398018] 11a4c400 [ 11.400319] ffffffc2 [ 11.402618] [ 11.406420] 02c8 [ 11.406427] 11a4c200 [ 11.408377] ffffffc2 [ 11.410677] 11a4c000 [ 11.412978] ffffffc2 [ 11.415279] 11a4fe00 [ 11.417579] ffffffc2 [ 11.419880] 11a4fc00 [ 11.422181] ffffffc2 [ 11.424481] [ 11.428291] [ 11.428291] X19: 0xffffffc211a58000: [ 11.433403] 8000 [ 11.433410] ffffffff [ 11.435360] fdffffff [ 11.437660] ffffffff [ 11.439961] ffffffff [ 11.442262] efffffff [ 11.444562] fffffff9 [ 11.446863] ffffffff [ 11.449164] fffffdff [ 11.451463] [ 11.455264] 8020 [ 11.455271] ffffffff [ 11.457221] ffffffff [ 11.459521] ffffdfff [ 11.461822] ffffffff [ 11.464122] ffffffff [ 11.466422] fffffbff [ 11.468723] effffffe [ 11.471023] fffffeff [ 11.473323] [ 11.477125] 8040 [ 11.477133] ffffffff [ 11.479082] 7fffffff [ 11.481383] fff7ffff [ 11.483684] ffffffef [ 11.485985] ffffffff [ 11.488286] ffffffff [ 11.490586] ffdff7ff [ 11.492886] ffffffff [ 11.495185] [ 11.498987] 8060 [ 11.498994] ffffffff [ 11.500944] ffffffff [ 11.503245] ffffffff [ 11.505546] ffffffff [ 11.507846] ffffffff [ 11.510147] ffffffff [ 11.512447] ffffffff [ 11.514747] dfffffff [ 11.517046] [ 11.520847] 8080 [ 11.520855] 00400000 [ 11.522804] 00000000 [ 11.525105] ffffffff [ 11.527406] 0000007f [ 11.529707] 0e2b5000 [ 11.532008] 00660002 [ 11.534308] 00000002 [ 11.536609] 00000000 [ 11.538909] [ 11.542710] 80a0 [ 11.542718] 00000200 [ 11.544667] 00000000 [ 11.546968] 0dc38000 [ 11.549269] ffffff80 [ 11.551570] 00000002 [ 11.553870] 00404100 [ 11.556171] 00000000 [ 11.558471] 00000000 [ 11.560770] [ 11.564572] 80c0 [ 11.564580] 00000000 [ 11.566529] 00000000 [ 11.568831] 00000000 [ 11.571132] 00000002 [ 11.573432] 00000031 [ 11.575732] 00000000 [ 11.578032] fffee4b8 [ 11.580334] 00000000 [ 11.582633] [ 11.586436] 80e0 [ 11.586444] 121fc000 [ 11.588393] ffffffc2 [ 11.590694] 00000002 [ 11.592993] 00000000 [ 11.595294] 00000064 [ 11.597594] 00000064 [ 11.599896] 00000064 [ 11.602196] 00000000 [ 11.604495] [ 11.608300] [ 11.608300] X20: 0xffffffc21ff4f800: [ 11.613411] f800 [ 11.613419] 00000000 [ 11.615368] 00000000 [ 11.617668] 00000000 [ 11.619969] 00000000 [ 11.622269] 00000000 [ 11.624569] 00000000 [ 11.626869] 00000000 [ 11.629170] 00000000 [ 11.631469] [ 11.635270] f820 [ 11.635278] 00000000 [ 11.637227] 00000000 [ 11.639528] 00000000 [ 11.641828] 00000000 [ 11.644129] 00000000 [ 11.646429] 00000000 [ 11.648730] 00000000 [ 11.651030] 00000000 [ 11.653330] [ 11.657132] f840 [ 11.657139] 00000000 [ 11.659089] 00000000 [ 11.661390] 00000000 [ 11.663691] 00000000 [ 11.665991] 00000000 [ 11.668291] 00000000 [ 11.670592] 00000000 [ 11.672892] 00000000 [ 11.675191] [ 11.678992] f860 [ 11.678999] 00000000 [ 11.680948] 00000000 [ 11.683248] 00000000 [ 11.685549] 00000000 [ 11.687850] 00000000 [ 11.690150] 00000000 [ 11.692451] 00000000 [ 11.694751] 00000000 [ 11.697051] [ 11.700851] f880 [ 11.700858] 37883784 [ 11.702809] 00000000 [ 11.705109] 000006bf [ 11.707409] 00000000 [ 11.709709] 00001331 [ 11.712010] 00000000 [ 11.714311] 000022e4 [ 11.716612] 00000000 [ 11.718911] [ 11.722713] f8a0 [ 11.722720] 000022dd [ 11.724669] 00000000 [ 11.726970] 00002332 [ 11.729271] 00000000 [ 11.731572] fffee4fb [ 11.733873] 00000000 [ 11.736174] fffee4fb [ 11.738474] 00000000 [ 11.740773] [ 11.744574] f8c0 [ 11.744581] 00000000 [ 11.746531] 00000000 [ 11.748831] 00000000 [ 11.751132] 00000000 [ 11.753433] 00000000 [ 11.755734] 00000000 [ 11.758034] 0000067d [ 11.760335] 00000000 [ 11.762634] [ 11.766436] f8e0 [ 11.766443] 000010bb [ 11.768392] 00000000 [ 11.770692] 00000000 [ 11.772992] 00000000 [ 11.775292] 00000000 [ 11.777593] 00000000 [ 11.779893] 00000000 [ 11.782195] 00000000 [ 11.784494] [ 11.788298] [ 11.788298] X21: 0xffffffc21ff23800: [ 11.793411] 3800 [ 11.793419] 00000000 [ 11.795368] 00000000 [ 11.797668] 00000000 [ 11.799968] 00000000 [ 11.802269] 00000000 [ 11.804569] 00000000 [ 11.806870] 00000000 [ 11.809170] 00000000 [ 11.811470] [ 11.815270] 3820 [ 11.815278] 00000000 [ 11.817227] 00000000 [ 11.819527] 00000000 [ 11.821828] 00000000 [ 11.824129] 00000000 [ 11.826430] 00000000 [ 11.828730] 00000000 [ 11.831031] 00000000 [ 11.833330] [ 11.837131] 3840 [ 11.837139] 00000000 [ 11.839089] 00000000 [ 11.841389] 00000000 [ 11.843691] 00000000 [ 11.845991] 00000000 [ 11.848292] 00000000 [ 11.850592] 00000000 [ 11.852893] 00000000 [ 11.855192] [ 11.858994] 3860 [ 11.859001] 00000000 [ 11.860950] 00000000 [ 11.863251] 00000000 [ 11.865551] 00000000 [ 11.867852] 00000000 [ 11.870152] 00000000 [ 11.872453] 00000000 [ 11.874753] 00000000 [ 11.877053] [ 11.880854] 3880 [ 11.880861] 211d211a [ 11.882810] 00000000 [ 11.885111] 0000ac72 [ 11.887412] 00000000 [ 11.889713] 00008d85 [ 11.892014] 00000000 [ 11.894315] 0000767f [ 11.896616] 00000000 [ 11.898915] [ 11.902717] 38a0 [ 11.902723] 00006169 [ 11.904673] 00000000 [ 11.906973] 00004561 [ 11.909275] 00000000 [ 11.911576] fffee4fb [ 11.913876] 00000000 [ 11.916178] fffee4fa [ 11.918478] 00000000 [ 11.920777] [ 11.924579] 38c0 [ 11.924586] 00000000 [ 11.926535] 00000000 [ 11.928836] 00000000 [ 11.931136] 00000000 [ 11.933437] 00000000 [ 11.935738] 00000000 [ 11.938041] 00000610 [ 11.940341] 00000000 [ 11.942641] [ 11.946442] 38e0 [ 11.946450] 000007b0 [ 11.948400] 00000000 [ 11.950701] 00000000 [ 11.953002] 00000000 [ 11.955302] 00000000 [ 11.957603] 00000000 [ 11.959903] 00000000 [ 11.962203] 00000000 [ 11.964502] [ 11.968310] [ 11.969822] Call trace: [ 11.972303] Exception stack(0xffffff8008003880 to 0xffffff80080039c0) [ 11.978829] 3880: ffffffffffff1f1d 0000000000568aff ffffff800981a0ec 0000000000000000 [ 11.986758] 38a0: ffffffc212221080 0000000000000000 0000000001ac37ab ffffffc209978c00 [ 11.994688] 38c0: ffffffc210347800 ffffffc211c00458 ffffffc211c00268 0000000000000040 [ 12.002618] 38e0: 0000000000000688 0000000000000013 0000000200000000 0000000000000000 [ 12.010547] 3900: ffffff80082ba168 000000743dc998e0 0000000000000000 ffffffc211a58080 [ 12.018476] 3920: ffffffc21ff4f880 ffffffc21ff23880 ffffff8009426880 ffffff800981ae08 [ 12.026406] 3940: ffffff800981a0ec ffffff800981a0ec 000000025f2896fe ffffff8009426000 [ 12.034335] 3960: 000000025f283b70 ffffff80080039c0 ffffff80081415a8 ffffff80080039c0 [ 12.042266] 3980: ffffff8008141844 00000000004001c5 ffffff800981ae08 ffffff800981a0ec [ 12.050194] 39a0: 0000007fffffffff 000000025f2896fe ffffff80080039c0 ffffff8008141844 [ 12.058126] [<ffffff8008141844>] walt_fixup_busy_time+0x3a4/0x418 [ 12.064298] [<ffffff800811d868>] set_task_cpu+0xc0/0x1f8 [ 12.069678] [<ffffff800811e3e4>] try_to_wake_up+0x234/0x4e0 [ 12.075322] [<ffffff800811e7b8>] default_wake_function+0x38/0x48 [ 12.081407] [<ffffff800813c12c>] autoremove_wake_function+0x3c/0x68 [ 12.087757] [<ffffff8008212f94>] wake_page_function+0x9c/0xa8 [ 12.093578] [<ffffff800813b79c>] __wake_up_common+0xa4/0x148 [ 12.099311] [<ffffff800813ba44>] __wake_up_locked_key_bookmark+0x44/0x58 [ 12.106096] [<ffffff8008213698>] wake_up_page_bit+0xa0/0x148 [ 12.111829] [<ffffff800821378c>] unlock_page+0x4c/0x58 [ 12.117036] [<ffffff80083844b0>] mpage_end_io+0xa8/0x1b0 [ 12.122422] [<ffffff800857046c>] bio_endio+0x154/0x190 [ 12.127628] [<ffffff8008578b7c>] blk_update_request+0xac/0x378 [ 12.133540] [<ffffff80087d7da0>] scsi_end_request+0x48/0x1c8 [ 12.139271] [<ffffff80087d80bc>] scsi_io_completion+0x19c/0x5b0 [ 12.145270] [<ffffff80087cf640>] scsi_finish_command+0xd0/0x120 [ 12.151266] [<ffffff80087d7788>] scsi_softirq_done+0x158/0x168 [ 12.157177] [<ffffff8008581fd8>] blk_done_softirq+0xb0/0xe8 [ 12.162825] [<ffffff8008081dbc>] __do_softirq+0x16c/0x3a8 [ 12.168295] [<ffffff80080ec46c>] irq_exit+0xc4/0xd8 [ 12.173239] [<ffffff8008156388>] __handle_domain_irq+0x90/0x100 [ 12.179232] [<ffffff8008081a70>] gic_handle_irq+0x60/0xb8 [ 12.184700] Exception stack(0xffffff8009813d00 to 0xffffff8009813e40) [ 12.191224] 3d00: ffffff8009829700 0000000000000001 0000004216ad1000 0000000000000001 [ 12.199153] 3d20: 0000004216ad1000 00ffffffffffffff 000000000081dade 0000000000000025 [ 12.207082] 3d40: ffffffc21fef6928 0000000000000013 ffffffc21fef6908 071c71c71c71c71c [ 12.215011] 3d60: 0000000000000688 0000000000000013 0000000200000000 0000000000000000 [ 12.222940] 3d80: ffffff80082ba168 000000743dc998e0 0000000000000000 000000025f572113 [ 12.230872] 3da0: 0000000000000000 ffffffc2103f2600 0000000000000000 ffffffc21139b000 [ 12.238801] 3dc0: 0000000000000000 000000025f56887c 0000000000000000 00000000bf34d218 [ 12.246731] 3de0: 0000000001300018 ffffff8009813e40 ffffff8008a33e28 ffffff8009813e40 [ 12.254660] 3e00: ffffff8008a33e2c 0000000060400145 ffffffc2103f2600 0000000000000000 [ 12.262589] 3e20: ffffffffffffffff 0000000000000000 ffffff8009813e40 ffffff8008a33e2c [ 12.270517] [<ffffff80080833ac>] el1_irq+0xec/0x194 [ 12.275460] [<ffffff8008a33e2c>] cpuidle_enter_state+0xb4/0x3a0 [ 12.281455] [<ffffff8008a3419c>] cpuidle_enter+0x34/0x48 [ 12.286839] [<ffffff800813caa8>] call_cpuidle+0x40/0x70 [ 12.292131] [<ffffff800813ce44>] do_idle+0x21c/0x278 [ 12.297160] [<ffffff800813d09c>] cpu_startup_entry+0x2c/0x30 [ 12.302897] [<ffffff8008e41220>] rest_init+0xd0/0xe0 [ 12.307932] [<ffffff8009300d98>] start_kernel+0x3f4/0x420 [ 12.313397] ---[ end trace c685021f9195e3be ]---

6 years

[Integration Branch] Update 25-May-2018

by Douglas Raillard

Hi, A new EAS integration branch created on May 25th is available on branch eas/next/integration here: http://linux-arm.org/git?p=linux-power.git For further information about main features, test coverage and work items for next integration please have a look at: https://developer.arm.com/open-source/energy-aware-scheduling/eas-mainline-… Best Regards, Douglas

6 years

[Integration Branch] Update 11-May-2018

by Douglas Raillard

Hi, A new EAS integration branch created on May 11th is available on branch eas/next/integration here: http://linux-arm.org/git?p=linux-power.git For further information about main features, test coverage and work items for next integration please have a look at: https://developer.arm.com/open-source/energy-aware-scheduling/eas-mainline-… Best Regards, Douglas

6 years

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eas-dev May 2018