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296825cbe14d4c95ee9c41ca5824f7487bfb4d9d
linux/kernel
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Srivatsa Vaddagiri 296825cbe1 sched: fix high wake up latencies with FAIR_USER_SCHED 
The reason why we are getting better wakeup latencies for
!FAIR_USER_SCHED is because of this snippet of code in place_entity():

	if (!initial) {
		/* sleeps upto a single latency don't count. */
		if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se))
						     ^^^^^^^^^^^^^^^^^^
			vruntime -= sysctl_sched_latency;

		/* ensure we never gain time by being placed backwards. */
		vruntime = max_vruntime(se->vruntime, vruntime);
	}

NEW_FAIR_SLEEPERS feature gives credit for sleeping only to tasks and
not group-level entities. With the patch attached, I could see that
wakeup latencies with FAIR_USER_SCHED are restored to the same level as
!FAIR_USER_SCHED.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31 22:45:22 +01:00
..
irq
genirq: stackdump after the "Trying to free already-free IRQ" message
2008-01-30 13:33:24 +01:00
power
driver core: make /sys/power a kobject
2008-01-24 20:40:25 -08:00
time
time: track accurate idle time with tick_sched.idle_sleeptime
2008-01-30 13:30:04 +01:00
.gitignore
…
acct.c
acct: real_parent ppid
2008-01-07 14:55:37 -08:00
audit_tree.c
[PATCH] audit: watching subtrees
2007-10-21 02:37:45 -04:00
audit.c
[PATCH] audit: watching subtrees
2007-10-21 02:37:45 -04:00
audit.h
[PATCH] audit: watching subtrees
2007-10-21 02:37:45 -04:00
auditfilter.c
[PATCH] audit: watching subtrees
2007-10-21 02:37:45 -04:00
auditsc.c
auditsc: fix kernel-doc param warnings
2007-10-22 19:40:02 -07:00
backtracetest.c
x86: add a simple backtrace test module
2008-01-30 13:33:08 +01:00
capability.c
Uninline find_pid etc set of functions
2007-10-19 11:53:41 -07:00
cgroup_debug.c
Task Control Groups: simple task cgroup debug info subsystem
2007-10-19 11:53:36 -07:00
cgroup.c
Improve cgroup printks
2007-11-14 18:45:37 -08:00
compat.c
Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-hrt
2007-10-18 15:12:41 -07:00
configs.c
…
cpu.c
cpu-hotplug: replace per-subsystem mutexes with get_online_cpus()
2008-01-25 21:08:02 +01:00
cpuset.c
cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()
2008-01-25 21:08:02 +01:00
delayacct.c
Add scaled time to taskstats based process accounting
2007-10-18 14:37:28 -07:00
dma.c
whitespace fixes: DMA channel allocator
2007-10-18 14:37:24 -07:00
exec_domain.c
whitespace fixes: execution domains
2007-10-18 14:37:26 -07:00
exit.c
wait_task_stopped(): pass correct exit_code to wait_noreap_copyout()
2007-11-29 09:24:55 -08:00
extable.c
module: Don't report discarded init pages as kernel text.
2008-01-29 17:13:18 +11:00
fork.c
KVM: Disallow fork() and similar games when using a VM
2008-01-30 17:53:13 +02:00
futex_compat.c
[FUTEX] Fix address computation in compat code.
2007-11-09 16:13:08 -08:00
futex.c
futex: Prevent stale futex owner when interrupted/timeout
2008-01-08 16:21:39 -08:00
hrtimer.c
hrtimer: unlock hrtimer_wakeup
2008-01-25 21:08:32 +01:00
itimer.c
whitespace fixes: interval timers
2007-10-18 14:37:26 -07:00
kallsyms.c
module: make module_address_lookup safe
2008-01-29 17:13:23 +11:00
Kconfig.hz
sched: high-res preemption tick
2008-01-25 21:08:29 +01:00
Kconfig.instrumentation
Tiny clean-up of OPROFILE/KPROBES configuration
2007-12-06 09:41:12 -08:00
Kconfig.preempt
sched: remove the !PREEMPT_BKL code
2008-01-25 21:08:33 +01:00
kexec.c
vmcoreinfo: add the array length of "free_list" for filtering free pages
2008-01-08 16:10:36 -08:00
kfifo.c
…
kmod.c
Fix unbalanced helper_lock in kernel/kmod.c
2008-01-17 15:38:59 -08:00
kprobes.c
x86: kprobes: add kprobes smoke tests that run on boot
2008-01-30 13:32:53 +01:00
ksysfs.c
Kobject: convert remaining kobject_unregister() to kobject_put()
2008-01-24 20:40:40 -08:00
kthread.c
sched: fix, always create kernel threads with normal priority
2008-01-25 21:08:33 +01:00
latency.c
…
latencytop.c
sched: latencytop support
2008-01-25 21:08:34 +01:00
lockdep_internals.h
…
lockdep_proc.c
…
lockdep.c
softlockup: automatically detect hung TASK_UNINTERRUPTIBLE tasks
2008-01-25 21:08:02 +01:00
Makefile
x86: add a simple backtrace test module
2008-01-30 13:33:08 +01:00
marker.c
Linux Kernel Markers: fix marker mutex not taken upon module load
2007-11-14 18:45:40 -08:00
module.c
x86/non-x86: percpu, node ids, apic ids x86.git fixup
2008-01-30 13:33:32 +01:00
mutex-debug.c
…
mutex-debug.h
…
mutex.c
…
mutex.h
…
notifier.c
Add kernel/notifier.c
2007-10-19 11:53:34 -07:00
ns_cgroup.c
cgroups: implement namespace tracking subsystem
2007-10-19 11:53:37 -07:00
nsproxy.c
pid namespaces: allow cloning of new namespace
2007-10-19 11:53:39 -07:00
panic.c
debug: add the end-of-trace marker and the module list to
2008-01-30 13:32:50 +01:00
params.c
module: fix the module name length in param_sysfs_builtin
2008-01-29 17:13:24 +11:00
pid.c
pidns: Place under CONFIG_EXPERIMENTAL
2007-11-14 18:45:43 -08:00
posix-cpu-timers.c
sched: rt-watchdog: fix .rlim_max = RLIM_INFINITY
2008-01-25 21:08:32 +01:00
posix-timers.c
Isolate some explicit usage of task->tgid
2007-10-19 11:53:40 -07:00
printk.c
x86: make early printk selectable on 64-bit as well
2008-01-30 13:33:06 +01:00
profile.c
debug: clean up kernel/profile.c
2008-01-25 21:08:33 +01:00
ptrace.c
x86: compat_sys_ptrace
2008-01-30 13:31:48 +01:00
rcuclassic.c
Preempt-RCU: implementation
2008-01-25 21:08:24 +01:00
rcupdate.c
Preempt-RCU: fix rcu_barrier for preemptive environment.
2008-01-25 21:08:24 +01:00
rcupreempt_trace.c
Preempt-RCU: implementation
2008-01-25 21:08:24 +01:00
rcupreempt.c
Preempt-RCU: CPU Hotplug handling
2008-01-25 21:08:25 +01:00
rcutorture.c
cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()
2008-01-25 21:08:02 +01:00
relay.c
whitespace fixes: relayfs
2007-10-18 14:37:24 -07:00
resource.c
Add IORESOUCE_BUSY flag for System RAM
2007-11-14 18:45:39 -08:00
rtmutex_common.h
…
rtmutex-debug.c
Use helpers to obtain task pid in printks
2007-10-19 11:53:43 -07:00
rtmutex-debug.h
…
rtmutex-tester.c
Driver core: change sysdev classes to use dynamic kobject names
2008-01-24 20:40:40 -08:00
rtmutex.c
Use helpers to obtain task pid in printks
2007-10-19 11:53:43 -07:00
rtmutex.h
…
rwsem.c
sched: mark rwsem functions as __sched for wchan/profiling
2007-12-18 15:21:13 +01:00
sched_debug.c
sched: keep total / count stats in addition to the max for
2008-01-25 21:08:35 +01:00
sched_fair.c
sched: fix high wake up latencies with FAIR_USER_SCHED
2008-01-31 22:45:22 +01:00
sched_idletask.c
sched: high-res preemption tick
2008-01-25 21:08:29 +01:00
sched_rt.c
sched: fix goto retry in pick_next_task_rt()
2008-01-25 21:08:34 +01:00
sched_stats.h
sched: clean up kernel/sched_stat.h
2007-11-28 15:52:56 +01:00
sched.c
spinlock: lockbreak cleanup
2008-01-30 13:31:20 +01:00
seccomp.c
…
signal.c
x86: rename the struct pt_regs members for 32/64-bit consistency
2008-01-30 13:30:56 +01:00
softirq.c
time: track accurate idle time with tick_sched.idle_sleeptime
2008-01-30 13:30:04 +01:00
softlockup.c
softlockup: fix signedness
2008-01-25 21:08:34 +01:00
spinlock.c
spinlock: lockbreak cleanup
2008-01-30 13:31:20 +01:00
srcu.c
…
stacktrace.c
…
stop_machine.c
cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()
2008-01-25 21:08:02 +01:00
sys_ni.c
[POWERPC] Provide a way to protect 4k subpages when using 64k pages
2008-01-24 10:06:01 +11:00
sys.c
x86: ignore the sys_getcpu() tcache parameter
2007-11-17 16:27:00 +01:00
sysctl_check.c
sysctl: Infrastructure for per namespace sysctls
2008-01-28 14:55:17 -08:00
sysctl.c
x86: various changes and cleanups to in_p/out_p delay details
2008-01-30 13:30:05 +01:00
taskstats.c
kernel/taskstats.c: fix bogus nlmsg_free()
2007-11-14 18:45:44 -08:00
test_kprobes.c
x86: kprobes: add kprobes smoke tests that run on boot
2008-01-30 13:32:53 +01:00
time.c
whitespace fixes: time syscalls
2007-10-18 14:37:24 -07:00
timer.c
time: timer cleanups
2008-01-30 13:30:00 +01:00
tsacct.c
Add scaled time to taskstats based process accounting
2007-10-18 14:37:28 -07:00
uid16.c
…
user_namespace.c
…
user.c
uids: merge multiple error paths in alloc_uid() into one
2008-01-25 21:08:26 +01:00
utsname_sysctl.c
Isolate the UTS namespace's domainname and hostname back
2007-11-29 09:24:53 -08:00
utsname.c
…
wait.c
…
workqueue.c
cpu-hotplug: replace per-subsystem mutexes with get_online_cpus()
2008-01-25 21:08:02 +01:00