Martin Schwidefsky
79741dd357
[PATCH] idle cputime accounting ...
The cpu time spent by the idle process actually doing something is
currently accounted as idle time. This is plain wrong, the architectures
that support VIRT_CPU_ACCOUNTING=y can do better: distinguish between the
time spent doing nothing and the time spent by idle doing work. The first
is accounted with account_idle_time and the second with account_system_time.
The architectures that use the account_xxx_time interface directly and not
the account_xxx_ticks interface now need to do the check for the idle
process in their arch code. In particular to improve the system vs true
idle time accounting the arch code needs to measure the true idle time
instead of just testing for the idle process.
To improve the tick based accounting as well we would need an architecture
primitive that can tell us if the pt_regs of the interrupted context
points to the magic instruction that halts the cpu.
In addition idle time is no more added to the stime of the idle process.
This field now contains the system time of the idle process as it should
be. On systems without VIRT_CPU_ACCOUNTING this will always be zero as
every tick that occurs while idle is running will be accounted as idle
time.
This patch contains the necessary common code changes to be able to
distinguish idle system time and true idle time. The architectures with
support for VIRT_CPU_ACCOUNTING need some changes to exploit this.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-12-31 15:11:46 +01:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:20:19 -08:00
Merge branches 'tracing/ftrace', 'tracing/ring-buffer' and 'tracing/urgent' into tracing/core
2008-12-19 09:42:40 +01:00
[PATCH] idle cputime accounting
2008-12-31 15:11:46 +01:00
tracing: removed duplicated #include
2008-12-30 17:35:40 -08:00
CRED: Wrap task credential accesses in the core kernel
2008-11-14 10:39:12 +11:00
[PATCH] fix broken timestamps in AVC generated by kernel threads
2008-12-09 02:27:41 -05:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
Merge branch 'next' into for-linus
2008-12-25 11:40:09 +11:00
cgroups: fix probable race with put_css_set[_taskexit] and find_css_set
2008-10-20 08:52:38 -07:00
freezer_cg: disable writing freezer.state of root cgroup
2008-11-12 17:17:16 -08:00
Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus
2008-10-20 13:14:06 +02:00
kernel/configs.c: remove useless comments
2008-10-20 08:52:34 -07:00
cpuinit fixes in kernel/*
2008-11-30 10:03:37 -08:00
sched, cpusets: fix warning in kernel/cpuset.c
2008-11-29 20:39:29 +01:00
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
schedstat: consolidate per-task cpu runtime stats
2008-12-18 13:54:01 +01:00
dma-coherent: export dma_[alloc|release]_from_coherent methods
2008-08-22 08:34:53 +02:00
kernel/dma.c: remove a CVS keyword
2008-10-16 11:21:30 -07:00
proc: move /proc/execdomains to kernel/exec_domain.c
2008-10-23 14:30:41 +04:00
Merge branch 'for-2.6.29' of git://git.kernel.dk/linux-2.6-block
2008-12-30 17:20:05 -08:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
aio: make the lookup_ioctx() lockless
2008-12-29 08:29:50 +01:00
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
CRED: Use RCU to access another task's creds and to release a task's own creds
2008-11-14 10:39:19 +11:00
hrtimers: fix warning in kernel/hrtimer.c
2008-12-19 00:45:32 +01:00
timers: fix itimer/many thread hang
2008-09-14 16:25:35 +02:00
allow stripping of generated symbols under CONFIG_KALLSYMS_ALL
2008-12-19 22:47:10 +01:00
container freezer: implement freezer cgroup subsystem
2008-10-20 08:52:34 -07:00
rcu: provide RCU options on non-preempt architectures too
2008-12-25 09:31:28 +01:00
kexec: fix crash_save_vmcoreinfo_init build problem
2008-10-20 15:28:50 -07:00
kgdb: call touch_softlockup_watchdog on resume
2008-10-06 13:50:59 -05:00
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds
2008-11-12 17:17:17 -08:00
profiling: dynamically enable readprofile at runtime
2008-10-16 11:21:31 -07:00
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
KSYM_SYMBOL_LEN fixes
2008-12-10 08:01:54 -08:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
lockdep: build fix
2008-08-13 12:55:10 +02:00
lockstat: contend with points
2008-10-20 15:43:10 +02:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
tracing/function-graph-tracer: introduce __notrace_funcgraph to filter special functions
2008-12-08 15:11:44 +01:00
mutex: __used is needed for function referenced only from inline asm
2008-11-24 10:00:28 +01:00
Merge commit 'v2.6.28-rc6' into core/debug
2008-11-26 08:22:50 +01:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
Merge branch 'core/debug' into core/core
2008-12-25 13:53:11 +01:00
Fix compile warning in kernel/params.c
2008-10-23 12:09:00 -07:00
pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits
2008-09-02 19:21:38 -07:00
pm_qos_requirement might sleep
2008-09-02 19:21:40 -07:00
Merge commit 'v2.6.28' into core/core
2008-12-25 13:51:46 +01:00
Merge branches 'timers/clocksource', 'timers/hpet', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/rtc' into timers/core
2008-12-25 18:02:25 +01:00
printk: fix discarding message when recursion_bug
2008-12-19 22:52:47 +01:00
Merge commit 'v2.6.28-rc7' into tracing/core
2008-12-04 09:07:19 +01:00
Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:21:10 -08:00
rcu: make rcu-stall debug printout more standard
2008-11-03 18:34:55 +01:00
rcupdate: fix bug of rcu_barrier*()
2008-10-21 15:59:53 +02:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
rcu: fix rcutorture behavior during reboot
2008-12-17 00:04:40 +01:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
relayfs: fix infinite loop with splice()
2008-12-10 08:01:52 -08:00
resources: skip sanity check of busy resources
2008-12-16 23:30:49 +01:00
hrtimer: convert kernel/* to the new hrtimer apis
2008-09-05 21:35:13 -07:00
[PATCH] idle cputime accounting
2008-12-31 15:11:46 +01:00
Revert "sched_clock: prevent scd->clock from moving backwards"
2008-12-14 16:23:17 -08:00
sched: add uid information to sched_debug for CONFIG_USER_SCHED
2008-12-01 20:39:50 +01:00
sched: optimize update_curr()
2008-12-16 09:46:33 +01:00
sched: backward looking buddy
2008-11-05 10:30:14 +01:00
sched: add CONFIG_SMP consistency
2008-10-22 10:01:52 +02:00
Merge branch 'sched/urgent'; commit 'v2.6.28' into sched/core
2008-12-25 13:42:23 +01:00
schedstat: consolidate per-task cpu runtime stats
2008-12-18 13:54:01 +01:00
semaphore: __down_common: use signal_pending_state()
2008-08-05 14:33:47 -07:00
Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:21:10 -08:00
generic-ipi: fix the smp_mb() placement
2008-11-06 08:41:56 +01:00
Merge branches 'core/debugobjects', 'core/iommu', 'core/locking', 'core/printk', 'core/rcu', 'core/resources', 'core/softirq' and 'core/stacktrace' into core/core
2008-12-25 14:06:29 +01:00
Merge commit 'v2.6.28' into core/core
2008-12-25 13:51:46 +01:00
lockdep: spin_lock_nest_lock(), checkpatch fixes
2008-08-13 13:56:51 +02:00
stacktrace: provide save_stack_trace_tsk() weak alias
2008-12-25 11:44:43 +01:00
stop_machine: fix race with return value (fixes Bug #11989 )
2008-11-16 15:09:52 -08:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
reintroduce accept4
2008-11-19 18:49:57 -08:00
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
2008-12-28 20:19:47 -08:00
[XFS] remove restricted chown parameter from xfs linux
2008-10-30 18:30:09 +11:00
select: add a timespec_add_safe() function
2008-09-05 21:34:57 -07:00
[PATCH] idle cputime accounting
2008-12-31 15:11:46 +01:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
CRED: Use RCU to access another task's creds and to release a task's own creds
2008-11-14 10:39:19 +11:00
CRED: Wrap current->cred and a few other accessors
2008-11-14 10:39:18 +11:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:27:58 -08:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
sysctl: simplify ->strategy
2008-10-16 11:21:47 -07:00
wait: kill is_sync_wait()
2008-10-16 11:21:31 -07:00
Merge branch 'master' into next
2008-11-14 11:29:12 +11:00
79741dd357