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Date: Tue, 2 Aug 2022 07:22:24 +0800
From: kernel test robot <lkp@...el.com>
To: Chengming Zhou <zhouchengming@...edance.com>, mingo@...hat.com,
peterz@...radead.org, vincent.guittot@...aro.org,
dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
vschneid@...hat.com
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org,
Chengming Zhou <zhouchengming@...edance.com>
Subject: Re: [PATCH v3 08/10] sched/fair: refactor
detach/attach_entity_cfs_rq using update_load_avg()
Hi Chengming,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on tip/sched/core]
[also build test ERROR on linus/master next-20220728]
[cannot apply to v5.19]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Chengming-Zhou/sched-fair-task-load-tracking-optimization-and-cleanup/20220801-122957
base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 8da3d9b8590bc178752d4b72938745e9a6c4c416
config: hexagon-randconfig-r012-20220731 (https://download.01.org/0day-ci/archive/20220802/202208020758.Ff3SOjvD-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 52cd00cabf479aa7eb6dbb063b7ba41ea57bce9e)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/336247ff1d2b402a18689fd891d79e99d8b444fc
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Chengming-Zhou/sched-fair-task-load-tracking-optimization-and-cleanup/20220801-122957
git checkout 336247ff1d2b402a18689fd891d79e99d8b444fc
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash kernel/sched/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
>> kernel/sched/fair.c:4462:11: error: no member named 'avg' in 'struct sched_entity'
if (!se->avg.last_update_time)
~~ ^
1 error generated.
vim +4462 kernel/sched/fair.c
4419
4420 /*
4421 * MIGRATION
4422 *
4423 * dequeue
4424 * update_curr()
4425 * update_min_vruntime()
4426 * vruntime -= min_vruntime
4427 *
4428 * enqueue
4429 * update_curr()
4430 * update_min_vruntime()
4431 * vruntime += min_vruntime
4432 *
4433 * this way the vruntime transition between RQs is done when both
4434 * min_vruntime are up-to-date.
4435 *
4436 * WAKEUP (remote)
4437 *
4438 * ->migrate_task_rq_fair() (p->state == TASK_WAKING)
4439 * vruntime -= min_vruntime
4440 *
4441 * enqueue
4442 * update_curr()
4443 * update_min_vruntime()
4444 * vruntime += min_vruntime
4445 *
4446 * this way we don't have the most up-to-date min_vruntime on the originating
4447 * CPU and an up-to-date min_vruntime on the destination CPU.
4448 */
4449
4450 static void
4451 enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
4452 {
4453 bool renorm = !(flags & ENQUEUE_WAKEUP) || (flags & ENQUEUE_MIGRATED);
4454 bool curr = cfs_rq->curr == se;
4455 int action = UPDATE_TG;
4456
4457 /*
4458 * !last_update_time means we've passed through migrate_task_rq_fair()
4459 * or task_change_group_fair() indicating we migrated cfs_rq. IOW we're
4460 * enqueueing a task on a new CPU or moving task to a new cgroup.
4461 */
> 4462 if (!se->avg.last_update_time)
4463 action |= DO_ATTACH;
4464
4465 /*
4466 * If we're the current task, we must renormalise before calling
4467 * update_curr().
4468 */
4469 if (renorm && curr)
4470 se->vruntime += cfs_rq->min_vruntime;
4471
4472 update_curr(cfs_rq);
4473
4474 /*
4475 * Otherwise, renormalise after, such that we're placed at the current
4476 * moment in time, instead of some random moment in the past. Being
4477 * placed in the past could significantly boost this task to the
4478 * fairness detriment of existing tasks.
4479 */
4480 if (renorm && !curr)
4481 se->vruntime += cfs_rq->min_vruntime;
4482
4483 /*
4484 * When enqueuing a sched_entity, we must:
4485 * - Update loads to have both entity and cfs_rq synced with now.
4486 * - For group_entity, update its runnable_weight to reflect the new
4487 * h_nr_running of its group cfs_rq.
4488 * - For group_entity, update its weight to reflect the new share of
4489 * its group cfs_rq
4490 * - Add its new weight to cfs_rq->load.weight
4491 */
4492 update_load_avg(cfs_rq, se, action);
4493 se_update_runnable(se);
4494 update_cfs_group(se);
4495 account_entity_enqueue(cfs_rq, se);
4496
4497 if (flags & ENQUEUE_WAKEUP)
4498 place_entity(cfs_rq, se, 0);
4499
4500 check_schedstat_required();
4501 update_stats_enqueue_fair(cfs_rq, se, flags);
4502 check_spread(cfs_rq, se);
4503 if (!curr)
4504 __enqueue_entity(cfs_rq, se);
4505 se->on_rq = 1;
4506
4507 if (cfs_rq->nr_running == 1) {
4508 check_enqueue_throttle(cfs_rq);
4509 if (!throttled_hierarchy(cfs_rq))
4510 list_add_leaf_cfs_rq(cfs_rq);
4511 }
4512 }
4513
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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