Hidetoshi Seto d180c5bcce sched: Introduce task_times() to replace task_{u,s}time() pair ...

Functions task_{u,s}time() are called in pair in almost all
cases.  However task_stime() is implemented to call task_utime()
from its inside, so such paired calls run task_utime() twice.

It means we do heavy divisions (div_u64 + do_div) twice to get
utime and stime which can be obtained at same time by one set
of divisions.

This patch introduces a function task_times(*tsk, *utime,
*stime) to retrieve utime and stime at once in better, optimized
way.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Spencer Candland <spencer@bluehost.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Americo Wang <xiyou.wangcong@gmail.com>
LKML-Reference: <4B0E16AE.906@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2009-11-26 12:59:19 +01:00

..

gcov

microblaze: Enable GCOV_PROFILE_ALL

2009-09-21 14:29:21 +02:00

irq

genirq: try_one_irq() must be called with irq disabled

2009-11-07 21:44:45 +01:00

power

PM / Hibernate: Add newline to load_image() fail path

2009-11-03 11:03:09 +01:00

time

headers: remove sched.h from interrupt.h

2009-10-11 11:20:58 -07:00

trace

ftrace: Fix unmatched locking in ftrace_regex_write()

2009-11-04 01:42:10 -05:00

.gitignore

…

acct.c

bsdacct: switch credentials for writing to the accounting file

2009-08-24 11:33:40 +10:00

async.c

async: Fix lack of boot-time console due to insufficient synchronization

2009-06-08 12:31:53 -07:00

audit_tree.c

Fix rule eviction order for AUDIT_DIR

2009-06-24 00:02:38 -04:00

audit_watch.c

Audit: reorganize struct audit_watch to save 8 bytes

2009-09-24 03:50:25 -04:00

audit.c

Audit: send signal info if selinux is disabled

2009-09-24 03:50:26 -04:00

audit.h

Fix rule eviction order for AUDIT_DIR

2009-06-24 00:02:38 -04:00

auditfilter.c

Audit: clean up all op= output to include string quoting

2009-06-24 00:00:52 -04:00

auditsc.c

Audit: rearrange audit_context to save 16 bytes per struct

2009-09-24 03:50:26 -04:00

backtracetest.c

…

bounds.c

…

capability.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

cgroup_freezer.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

cgroup.c

cgroup: fix strstrip() misuse

2009-10-29 07:39:25 -07:00

compat.c

signals: implement sys_rt_tgsigqueueinfo

2009-04-30 19:24:24 +02:00

configs.c

kernel/configs.c: remove useless comments

2008-10-20 08:52:34 -07:00

cpu.c

Merge branch 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-15 09:19:38 -07:00

cpuset.c

cpumask: Partition_sched_domains takes array of cpumask_var_t

2009-11-04 13:16:40 +01:00

cred-internals.h

CRED: Inaugurate COW credentials

2008-11-14 10:39:23 +11:00

cred.c

creds_are_invalid() needs to be exported for use by modules:

2009-09-23 11:02:26 -07:00

delayacct.c

headers: taskstats_kern.h trim

2009-09-18 09:48:52 -07:00

dma.c

kernel/dma.c: remove a CVS keyword

2008-10-16 11:21:30 -07:00

exec_domain.c

Get rid of indirect include of fs_struct.h

2009-03-31 23:00:27 -04:00

exit.c

sched: Introduce task_times() to replace task_{u,s}time() pair

2009-11-26 12:59:19 +01:00

extable.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 11:04:19 -07:00

fork.c

Correct nr_processes() when CPUs have been unplugged

2009-11-03 07:52:39 -08:00

freezer.c

sched: fix nr_uninterruptible accounting of frozen tasks really

2009-07-18 14:19:53 +02:00

futex_compat.c

futex: Fix compat_futex to be same as futex for REQUEUE_PI

2009-08-10 15:41:12 +02:00

futex.c

futex: Fix spurious wakeup for requeue_pi really

2009-10-28 20:34:34 +01:00

groups.c

groups: move code to kernel/groups.c

2009-06-16 19:47:48 -07:00

hrtimer.c

Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-10-05 12:04:16 -07:00

hung_task.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

itimer.c

itimers: Add tracepoints for itimer

2009-08-29 14:10:07 +02:00

kallsyms.c

kallsyms: use new arch_is_kernel_text()

2009-09-23 07:39:30 -07:00

Kconfig.freezer

container freezer: implement freezer cgroup subsystem

2008-10-20 08:52:34 -07:00

Kconfig.hz

sched: fix SCHED_HRTICK dependency

2008-07-28 14:37:38 +02:00

Kconfig.preempt

rcu: provide RCU options on non-preempt architectures too

2008-12-25 09:31:28 +01:00

kexec.c

kexec: fix omitting offset in extended crashkernel syntax

2009-07-29 19:10:34 -07:00

kfifo.c

kfifo: Use "const" definitions

2009-09-19 13:13:17 -07:00

kgdb.c

sched: Remove unused __schedule() declaration

2009-11-04 11:43:42 +01:00

kmod.c

Revert "kmod: fix race in usermodehelper code"

2009-09-23 18:12:10 -07:00

kprobes.c

const: constify remaining file_operations

2009-10-01 16:11:11 -07:00

ksysfs.c

kernel/ksysfs.c:fix dependence on CONFIG_NET

2009-01-06 10:44:31 -08:00

kthread.c

sched: Fix kthread_bind() by moving the body of kthread_bind() to sched.c

2009-11-03 07:25:00 +01:00

latencytop.c

sched, latencytop: incorporate review feedback from Andrew Morton

2009-02-11 10:18:04 +01:00

lockdep_internals.h

lockdep: BFS cleanup

2009-07-24 10:53:29 +02:00

lockdep_proc.c

seq_file: constify seq_operations

2009-09-23 07:39:29 -07:00

lockdep_states.h

lockdep: move state bit definitions around

2009-02-14 23:27:59 +01:00

lockdep.c

lockdep: Use cpu_clock() for lockstat

2009-10-09 15:56:44 +02:00

Makefile

cgroups: move the cgroup debug subsys into cgroup.c to access internal state

2009-09-24 07:20:57 -07:00

module.c

module: fix up CONFIG_KALLSYMS=n build.

2009-10-01 16:11:11 -07:00

mutex-debug.c

headers: remove sched.h from interrupt.h

2009-10-11 11:20:58 -07:00

mutex-debug.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

mutex.c

Merge branch 'linus' into perfcounters/core

2009-06-11 17:55:42 +02:00

mutex.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

notifier.c

Merge commit 'v2.6.28-rc6' into core/debug

2008-11-26 08:22:50 +01:00

ns_cgroup.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

nsproxy.c

nsproxy: extract create_nsproxy()

2009-06-18 13:03:56 -07:00

panic.c

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-10-08 12:16:35 -07:00

params.c

param: fix setting arrays of bool

2009-10-29 08:56:20 +10:30

perf_event.c

perf events: Don't generate events for the idle task when exclude_idle is set

2009-10-23 09:35:02 +02:00

pid_namespace.c

pidns: deny CLONE_PARENT|CLONE_NEWPID combination

2009-09-24 07:21:04 -07:00

pid.c

mm: also use alloc_large_system_hash() for the PID hash table

2009-09-22 07:17:38 -07:00

pm_qos_params.c

pm_qos_requirement might sleep

2008-09-02 19:21:40 -07:00

posix-cpu-timers.c

itimers: Add tracepoints for itimer

2009-08-29 14:10:07 +02:00

posix-timers.c

time: Introduce CLOCK_REALTIME_COARSE

2009-08-21 21:43:46 +02:00

printk.c

printk: add printk_delay to make messages readable for some scenarios

2009-09-23 07:39:28 -07:00

profile.c

kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file

2009-09-20 20:15:40 +02:00

ptrace.c

ptrace: __ptrace_detach: do __wake_up_parent() if we reap the tracee

2009-09-24 07:20:59 -07:00

rcupdate.c

rcu: Move rcu_barrier() to rcutree

2009-10-07 08:11:20 +02:00

rcutorture.c

rcu: Clean up code to address Ingo's checkpatch feedback

2009-09-23 19:46:30 +02:00

rcutree_plugin.h

rcu: Fix TREE_PREEMPT_RCU CPU_HOTPLUG bad-luck hang

2009-10-15 20:33:01 +02:00

rcutree_trace.c

rcu: Make hot-unplugged CPU relinquish its own RCU callbacks

2009-10-07 08:11:20 +02:00

rcutree.c

rcu: Fix long-grace-period race between forcing and initialization

2009-11-02 16:06:21 +01:00

rcutree.h

rcu: Fix long-grace-period race between forcing and initialization

2009-11-02 16:06:21 +01:00

relay.c

const: mark struct vm_struct_operations

2009-09-27 11:39:25 -07:00

res_counter.c

memcg: some modification to softlimit under hierarchical memory reclaim.

2009-10-01 16:11:13 -07:00

resource.c

walk system ram range

2009-09-23 07:39:41 -07:00

rtmutex_common.h

rt_mutex: add proxy lock routines

2009-04-06 11:14:02 +02:00

rtmutex-debug.c

…

rtmutex-debug.h

…

rtmutex-tester.c

sysdev: Pass the attribute to the low level sysdev show/store function

2008-07-21 21:55:02 -07:00

rtmutex.c

rtmutex: Avoid deadlock in rt_mutex_start_proxy_lock()

2009-08-06 05:50:21 +02:00

rtmutex.h

…

rwsem.c

…

sched_clock.c

sched_clock: Fix atomicity/continuity bug by using cmpxchg64()

2009-09-30 22:56:10 +02:00

sched_cpupri.c

sched: Add new prio to cpupri before removing old prio

2009-08-02 14:26:09 +02:00

sched_cpupri.h

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sched_debug.c

sched: Rate-limit newidle

2009-11-04 19:13:48 +01:00

sched_fair.c

Merge branch 'sched/urgent' into sched/core

2009-11-26 10:50:42 +01:00

sched_features.h

sched: Add new wakeup preemption mode: WAKEUP_RUNNING

2009-09-17 10:17:25 +02:00

sched_idletask.c

sched: Simplify sys_sched_rr_get_interval() system call

2009-09-21 09:53:55 +02:00

sched_rt.c

cpumask: Simplify sched_rt.c

2009-11-04 13:16:38 +01:00

sched_stats.h

sched: remove unused fields from struct rq

2009-03-24 23:16:51 +01:00

sched.c

sched: Introduce task_times() to replace task_{u,s}time() pair

2009-11-26 12:59:19 +01:00

seccomp.c

x86-64: seccomp: fix 32/64 syscall hole

2009-03-02 15:41:30 -08:00

semaphore.c

semaphore: __down_common: use signal_pending_state()

2008-08-05 14:33:47 -07:00

signal.c

signals: inline __fatal_signal_pending

2009-09-24 07:21:01 -07:00

slow-work.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

smp.c

cpumask: remove arch_send_call_function_ipi

2009-09-24 09:34:47 +09:30

softirq.c

softirq: add BLOCK_IOPOLL to softirq_to_name

2009-09-17 15:53:44 -04:00

softlockup.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

spinlock.c

locking: Allow arch-inlined spinlocks

2009-08-31 18:08:50 +02:00

srcu.c

…

stacktrace.c

stacktrace: provide save_stack_trace_tsk() weak alias

2008-12-25 11:44:43 +01:00

stop_machine.c

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sys_ni.c

Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

2009-09-24 15:13:11 -07:00

sys.c

sched: Introduce task_times() to replace task_{u,s}time() pair

2009-11-26 12:59:19 +01:00

sysctl_check.c

sysctl: fix false positives when PROC_SYSCTL=n

2009-10-29 07:39:30 -07:00

sysctl.c

Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6

2009-09-24 07:53:22 -07:00

taskstats.c

genetlink: make netns aware

2009-07-12 14:03:27 -07:00

test_kprobes.c

kprobes: add tests for register_kprobes

2009-01-06 15:59:20 -08:00

time.c

time: Prevent 32 bit overflow with set_normalized_timespec()

2009-09-15 10:17:30 +02:00

timeconst.pl

…

timer.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-23 09:46:15 -07:00

tracepoint.c

trivial: fix typo "to to" in multiple files

2009-09-21 15:14:55 +02:00

tsacct.c

Fix fixpoint divide exception in acct_update_integrals

2009-03-09 08:13:35 -07:00

uid16.c

headers: utsname.h redux

2009-09-23 18:13:10 -07:00

up.c

smp_call_function_single(): be slightly less stupid, fix #2

2009-01-12 16:04:37 +01:00

user_namespace.c

Fix recursive lock in free_uid()/free_user_ns()

2009-02-27 16:26:21 -08:00

user.c

uids: Prevent tear down race

2009-11-02 16:02:39 +01:00

utsname_sysctl.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

utsname.c

utsns: extract creeate_uts_ns()

2009-06-18 13:03:55 -07:00

wait.c

locking, sched: Give waitqueue spinlocks their own lockdep classes

2009-08-10 14:43:09 +02:00

workqueue.c

Merge branch 'hwpoison-2.6.32' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6

2009-10-29 08:20:00 -07:00