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Mike Galbraith 5f01d519e6 sched: fix sleeper bonus limit 
There is an Amarok song switch time increase (regression) under
hefty load.

What is happening is that sleeper_bonus is never consumed, and only
rarely goes below runtime_limit, so for the most part, Amarok isn't
getting any bonus at all.  We're keeping sleeper_bonus right at
runtime_limit (sched_latency == sched_runtime_limit == 40ms) forever, ie
we don't consume if we're lower that that, and don't add if we're above
it.  One Amarok thread waking (or anybody else) will push us past the
threshold, so the next thread waking gets nada, but will reap pain from
the previous thread waking until we drop back to runtime_limit.  It
looks to me like under load, some random task gets a bonus, and
everybody else pays, whether deserving or not.

This diff fixed the regression for me at any load rate.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
2007-08-28 12:53:24 +02:00
..
irq free_irq(): fix DEBUG_SHIRQ handling 2007-08-22 19:52:44 -07:00
power Hibernation: do not try to mark invalid PFNs as nosave 2007-08-11 15:47:40 -07:00
time timer: remove clockevents_unregister_notifier 2007-08-11 15:47:42 -07:00
.gitignore
acct.c Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time(). 2007-07-25 10:09:20 -07:00
audit.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
audit.h Audit: add TTY input auditing 2007-07-16 09:05:47 -07:00
auditfilter.c [PATCH] allow audit filtering on bit & operations 2007-07-22 09:57:02 -04:00
auditsc.c kernel/auditsc.c: fix an off-by-one 2007-08-22 19:52:44 -07:00
capability.c [PATCH] pid: replace do/while_each_task_pid with do/while_each_pid_task 2007-02-12 09:48:32 -08:00
compat.c signal/timer/event: timerfd compat code 2007-05-11 08:29:36 -07:00
configs.c use simple_read_from_buffer in kernel/ 2007-05-09 12:30:49 -07:00
cpu.c HOTPLUG: Add CPU_DYING notifier 2007-07-16 12:05:49 +03:00
cpuset.c usermodehelper: Tidy up waiting 2007-07-18 08:47:40 -07:00
delayacct.c sched: update delay-accounting to use CFS's precise stats 2007-07-09 18:52:00 +02:00
die_notifier.c move die notifier handling to common code 2007-05-08 11:15:04 -07:00
dma.c [PATCH] struct seq_operations and struct file_operations constification 2006-12-07 08:39:46 -08:00
exec_domain.c
exit.c Kill some obsolete sub-thread-ptrace stuff 2007-08-03 15:06:33 -07:00
extable.c
fork.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
futex.c futex_unlock_pi() hurts my brain and may cause application deadlock 2007-08-22 19:52:44 -07:00
futex_compat.c Revert "futex_requeue_pi optimization" 2007-06-18 09:48:41 -07:00
hrtimer.c Cache xtime every call to update_wall_time 2007-07-25 10:17:44 -07:00
itimer.c The scheduled -EINVAL for invalid timevals in setitimer 2007-05-08 11:15:13 -07:00
kallsyms.c kallsyms: make KSYM_NAME_LEN include space for trailing '\0' 2007-07-17 10:23:03 -07:00
Kconfig.hz [PATCH] HZ: 300Hz support 2006-12-07 08:39:36 -08:00
Kconfig.preempt [PATCH] sched: arch preempt notifier mechanism 2007-07-26 13:40:43 +02:00
kexec.c kdump/kexec: calculate note size at compile time 2007-05-08 11:15:07 -07:00
kfifo.c is_power_of_2: kernel/kfifo.c 2007-07-16 09:05:50 -07:00
kmod.c kernel-doc fix for kmod.c 2007-07-26 11:33:06 -07:00
kprobes.c fix compilation with gcc 4.2 2007-08-11 15:47:42 -07:00
ksysfs.c FRV: Fix linkage problems 2007-07-20 12:01:34 -07:00
kthread.c kthread: silence bogus section mismatch warning 2007-07-31 15:39:42 -07:00
latency.c [PATCH] severing module.h->sched.h 2006-12-04 02:00:22 -05:00
lockdep.c lockdep debugging: give stacktrace for init_error 2007-07-19 10:04:49 -07:00
lockdep_internals.h [PATCH] lockdep: more chains 2006-12-07 08:39:43 -08:00
lockdep_proc.c Fix leak on /proc/lockdep_stats 2007-07-31 15:39:40 -07:00
Makefile user namespace: add the framework 2007-07-16 09:05:47 -07:00
module.c Fix Off-by-one in /sys/module/*/refcnt 2007-08-22 14:35:35 -07:00
mutex-debug.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
mutex-debug.h
mutex.c lockstat: measure lock bouncing 2007-07-19 10:04:49 -07:00
mutex.h [PATCH] lockdep: prove mutex locking correctness 2006-07-03 15:27:04 -07:00
nsproxy.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
panic.c Report that kernel is tainted if there was an OOPS 2007-07-17 10:23:02 -07:00
params.c modules: better error messages when modules fail to load due to a sysfs problem. 2007-07-30 14:25:23 -07:00
pid.c namespace: ensure clone_flags are always stored in an unsigned long 2007-07-16 09:05:48 -07:00
posix-cpu-timers.c sched: make posix-cpu-timers use CFS's accounting information 2007-07-09 18:51:58 +02:00
posix-timers.c posix-timers: fix creation race 2007-08-22 19:52:46 -07:00
printk.c fix - ensure we don't use bootconsoles after init has been released 2007-08-21 20:23:53 -07:00
profile.c fix compilation with gcc 4.2 2007-08-11 15:47:42 -07:00
ptrace.c coredump masking: reimplementation of dumpable using two flags 2007-07-19 10:04:46 -07:00
rcupdate.c Add suspend-related notifications for CPU hotplug 2007-05-09 12:30:56 -07:00
rcutorture.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
relay.c Fix a use after free bug in kernel->userspace relay file support 2007-07-31 15:39:42 -07:00
resource.c libata/IDE: remove combined mode quirk 2007-04-28 14:15:59 -04:00
rtmutex-debug.c FUTEX: Tidy up the code 2007-07-16 09:05:49 -07:00
rtmutex-debug.h
rtmutex-tester.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
rtmutex.c FUTEX: Tidy up the code 2007-07-16 09:05:49 -07:00
rtmutex.h
rtmutex_common.h FUTEX: Tidy up the code 2007-07-16 09:05:49 -07:00
rwsem.c lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex 2007-07-19 10:04:49 -07:00
sched.c sched: s/sched_latency/sched_min_granularity 2007-08-25 22:17:19 +02:00
sched_debug.c sched: sched_clock_idle_[sleep|wakeup]_event() 2007-08-23 15:18:02 +02:00
sched_fair.c sched: fix sleeper bonus limit 2007-08-28 12:53:24 +02:00
sched_idletask.c sched: remove the 'u64 now' parameter from ->put_prev_task() 2007-08-09 11:16:49 +02:00
sched_rt.c sched: optimize task_tick_rt() a bit 2007-08-24 20:39:10 +02:00
sched_stats.h [PATCH] sched: add schedstat_set() API 2007-08-02 17:41:40 +02:00
seccomp.c make seccomp zerocost in schedule 2007-07-16 09:05:50 -07:00
signal.c signalfd: fix interaction with posix-timers 2007-08-22 19:52:46 -07:00
softirq.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
softlockup.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
spinlock.c lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex 2007-07-19 10:04:49 -07:00
srcu.c [PATCH] SRCU: report out-of-memory errors 2006-10-04 07:55:30 -07:00
stacktrace.c [PATCH] lockdep: stacktrace subsystem, core 2006-07-03 15:27:02 -07:00
stop_machine.c Fix stop_machine_run problem with naughty real time process 2007-07-16 09:05:41 -07:00
sys.c Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
sys_ni.c diskquota: 32bit quota tools on 64bit architectures 2007-07-16 09:05:48 -07:00
sysctl.c sched: cleanup, sched_granularity -> sched_min_granularity 2007-08-25 18:41:53 +02:00
taskstats.c taskstats: add context-switch counters 2007-07-16 09:05:46 -07:00
time.c Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time(). 2007-07-25 10:09:20 -07:00
timer.c Pull ia64-clocksource into release branch 2007-07-20 11:26:47 -07:00
tsacct.c Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time(). 2007-07-25 10:09:20 -07:00
uid16.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
user.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
user_namespace.c fix create_new_namespaces() return value 2007-07-16 09:05:47 -07:00
utsname.c namespace: ensure clone_flags are always stored in an unsigned long 2007-07-16 09:05:48 -07:00
utsname_sysctl.c remove CONFIG_UTS_NS and CONFIG_IPC_NS 2007-07-16 09:05:47 -07:00
wait.c Fix occurrences of "the the " 2007-05-09 08:57:56 +02:00
workqueue.c fix bogus hotplug cpu warning 2007-08-27 10:27:48 -07:00