- 15 Oct, 2007 40 commits
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Srivatsa Vaddagiri authored
group scheduler wakeup latency fix: when checking for preemption we must check cross-group too, not just intra-group. Signed-off-by:Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
Lee Schermerhorn noticed that set_leftmost() contains dead code, remove this. Reported-by:
Lee Schermerhorn <Lee.Schermerhorn@hp.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Hiroshi Shimamoto authored
The adjusting sched_class is a missing part of the already existing "do not leak PI boosting priority to the child" at the sched_fork(). This patch moves the adjusting sched_class from wake_up_new_task() to sched_fork(). this also shrinks the code a bit: text data bss dec hex filename 40111 4018 292 44421 ad85 sched.o.before 40102 4018 292 44412 ad7c sched.o.after Signed-off-by:
Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by:
Dmitry Adamushko <dmitry.adamushko@gmail.com> Signed-off-by:
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Peter Zijlstra authored
max_vruntime() simplification. Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl>
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Ingo Molnar authored
fix sched_fork(): large latencies at new task creation time because the ->vruntime was not fixed up cross-CPU, if the parent got migrated after the child's CPU got set up. Signed-off-by:
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Ingo Molnar authored
fix sign check error in place_entity() - we'd get excessive latencies due to negatives being converted to large u64's. Signed-off-by:
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Ingo Molnar authored
undo some of the recent changes that are not needed after all, such as last_min_vruntime. Signed-off-by:
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Ingo Molnar authored
remove last_min_vruntime use - prepare to remove it. Signed-off-by:
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Ingo Molnar authored
remove condition from set_task_cpu(). Now that ->vruntime is not global anymore, it should (and does) work fine without it too. Signed-off-by:
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Ingo Molnar authored
entity_key() fix - we'd occasionally end up with a 0 vruntime in the !initial case. Signed-off-by:
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Peter Zijlstra authored
debug feature: check how well we schedule within a reasonable vruntime 'spread' range. (note that CPU overload can increase the spread, so this is not a hard condition, but normal loads should be within the spread.) Signed-off-by:
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Ingo Molnar authored
more width for parameter printouts in /proc/sched_debug. Signed-off-by:
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Peter Zijlstra authored
add vslice: the load-dependent "virtual slice" a task should run ideally, so that the observed latency stays within the sched_latency window. Signed-off-by:
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Ingo Molnar authored
print the current value of all tunables in /proc/sched_debug output. Signed-off-by:
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Ingo Molnar authored
remove unneeded tunables. Signed-off-by:
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S.Caglar Onur authored
build fix for the SCHED_DEBUG && !SCHEDSTATS case. Signed-off-by:
S.Ceglar Onur <caglar@pardus.org.tr> Signed-off-by:
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Ingo Molnar authored
add per task and per rq BKL usage statistics. Signed-off-by:
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Ingo Molnar authored
enable CONFIG_FAIR_GROUP_SCHED=y by default. Signed-off-by:
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Ingo Molnar authored
fair-group sched, cleanups. Signed-off-by:
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Srivatsa Vaddagiri authored
Enable user-id based fair group scheduling. This is useful for anyone who wants to test the group scheduler w/o having to enable CONFIG_CGROUPS. A separate scheduling group (i.e struct task_grp) is automatically created for every new user added to the system. Upon uid change for a task, it is made to move to the corresponding scheduling group. A /proc tunable (/proc/root_user_share) is also provided to tune root user's quota of cpu bandwidth. Signed-off-by:
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Signed-off-by:
Dhaval Giani <dhaval@linux.vnet.ibm.com> Signed-off-by:
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Srivatsa Vaddagiri authored
With the view of supporting user-id based fair scheduling (and not just container-based fair scheduling), this patch renames several functions and makes them independent of whether they are being used for container or user-id based fair scheduling. Also fix a problem reported by KAMEZAWA Hiroyuki (wrt allocating less-sized array for tg->cfs_rq[] and tf->se[]). Signed-off-by:
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Srivatsa Vaddagiri authored
- Print &rq->cfs statistics as well (useful for group scheduling) Signed-off-by:
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Srivatsa Vaddagiri authored
- print nr_running and load information for cfs_rq in /proc/sched_debug Signed-off-by:
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Srivatsa Vaddagiri authored
- fix a minor bug in yield (seen for CONFIG_FAIR_GROUP_SCHED), group scheduling would skew when yield was called. Signed-off-by:
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Srivatsa Vaddagiri authored
Revert removal of set_curr_task. Use put_prev_task/set_curr_task when changing groups/policies Signed-off-by: Srivatsa Vaddagiri < vatsa@linux.vnet.ibm.com> Signed-off-by:
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Ingo Molnar authored
some trivial whitespace cleanups. Signed-off-by:
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Mike Galbraith authored
fix formatting of /proc/sched_debug Signed-off-by:
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Ingo Molnar authored
enhance debug output by changing 12345678 nsecs to 12.345678 output, this is more human-readable. Signed-off-by:
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Ingo Molnar authored
print the correct amount of dashes in /proc/sched_debug. Signed-off-by:
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Dmitry Adamushko authored
rework enqueue/dequeue_entity() to get rid of sched_class::set_curr_task(). This simplifies sched_setscheduler(), rt_mutex_setprio() and sched_move_tasks(). text data bss dec hex filename 24330 2734 20 27084 69cc sched.o.before 24233 2730 20 26983 6967 sched.o.after Signed-off-by:
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Dmitry Adamushko authored
the 'p' (task_struct) parameter in the sched_class :: yield_task() is redundant as the caller is always the 'current'. Get rid of it. text data bss dec hex filename 24341 2734 20 27095 69d7 sched.o.before 24330 2734 20 27084 69cc sched.o.after Signed-off-by:
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Dmitry Adamushko authored
due to the fact that we no longer keep the 'current' within the tree, dequeue/enqueue_entity() is useless for the 'current' in task_new_fair(). We are about to reschedule and sched_class->put_prev_task() will put the 'current' back into the tree, based on its new key. text data bss dec hex filename 24388 2734 20 27142 6a06 sched.o.before 24341 2734 20 27095 69d7 sched.o.after Signed-off-by:
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Ingo Molnar authored
fix delay accounting performance regression - those sched_clock() calls are not needed. Signed-off-by:
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Dmitry Adamushko authored
Get rid of 'sched_entity::fair_key'. As a side effect, 'current' is not kept withing the tree for SCHED_NORMAL/BATCH tasks anymore. This simplifies some parts of code (e.g. entity_tick() and yield_task_fair()) and also somewhat optimizes them (e.g. a single update_curr() now vs. dequeue/enqueue() before in entity_tick()). Signed-off-by:
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Dmitry Adamushko authored
p->sched_class->set_curr_task() has to be called before activate_task()/enqueue_task() in rt_mutex_setprio(), sched_setschedule() and sched_move_task() in order to set up 'cfs_rq->curr'. The logic of enqueueing depends on whether a task to be inserted is 'current' or not. Signed-off-by:
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Dmitry Adamushko authored
Fix a problem in the 'sched-group' patch for !CONFIG_FAIR_GROUP_SCHED. description: sched_setscheduler() { ... if (task_running()) p->sched_class->put_prev_entity(); [ this one sets up cfs_rq->curr to NULL ] ... if (task_running) p->sched_class->set_curr_task(); [ and this one is a _NOP_ (empty) for !CONFIG_FAIR_GROUP_SCHED ] As a result, the task continues to run with cfs_rq->curr == NULL... no crashes (due to checks for !NULL in place) but e.g. update_curr() effectively becomes a NOP... i.e. runtime statistics for this task is not accounted untill it's rescheduled anew. Signed-off-by: -
Srivatsa Vaddagiri authored
Add interface to control cpu bandwidth allocation to task-groups. (not yet configurable, due to missing CONFIG_CONTAINERS) Signed-off-by:
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Mike Galbraith authored
fix SMP migration latencies: the vruntimes of different CPUs are at incompatible offsets so they have to be fixed up when migrating a task across CPUs. Signed-off-by:
Mike Galbraith <efault@gmx.de> Signed-off-by:
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Peter Zijlstra authored
Better min_vruntime tracking: update it every time 'curr' is updated - not just when a task is enqueued into the tree. Signed-off-by:
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Ingo Molnar authored
sched.o gets smaller and faster if we compile it with -fomit-frame-pointers, so make this a config option. The cost is the loss of multi-depth wchan lookups - but SysRq-T is a sufficient replacement for them anyway, so their utility is much lower these days. the size difference is significant: text data bss dec hex filename 34005 3462 24 37491 9273 sched.o.before 33470 3462 24 36956 905c sched.o.after Signed-off-by:
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