Wanpeng Li f9bcf1e0e0 sched/cputime: Fix steal time accounting ...

Commit:

  5743021831 ("sched/cputime: Count actually elapsed irq & softirq time")

... didn't take steal time into consideration with passing the noirqtime
kernel parameter.

As Paolo pointed out before:

| Why not? If idle=poll, for example, any time the guest is suspended (and
| thus cannot poll) does count as stolen time.

This patch fixes it by reducing steal time from idle time accounting when
the noirqtime parameter is true. The average idle time drops from 56.8%
to 54.75% for nohz idle kvm guest(noirqtime, idle=poll, four vCPUs running
on one pCPU).

Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim <rkrcmar@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1470893795-3527-1-git-send-email-wanpeng.li@hotmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-08-11 11:02:14 +02:00

..

bpf

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2016-07-27 12:03:20 -07:00

configs

config: add android config fragments

2016-08-02 19:35:42 -04:00

debug

mm/init: Add 'rodata=off' boot cmdline parameter to disable read-only kernel mappings

2016-02-22 08:51:37 +01:00

events

perf/core: Change log level for duration warning to KERN_INFO

2016-08-02 10:23:57 +02:00

gcov

gcov: add support for gcc version >= 6

2016-07-15 14:54:27 +09:00

irq

genirq: Fix missing irq allocation affinity hint

2016-07-19 10:49:47 +02:00

livepatch

modules: add ro_after_init support

2016-08-04 10:16:55 +09:30

locking

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

2016-07-25 12:41:29 -07:00

power

mm, vmscan: move LRU lists to node

2016-07-28 16:07:41 -07:00

printk

Revert "printk: create pr_<level> functions"

2016-08-09 10:48:18 -07:00

rcu

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

2016-07-29 13:55:30 -07:00

sched

sched/cputime: Fix steal time accounting

2016-08-11 11:02:14 +02:00

time

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

2016-07-29 13:55:30 -07:00

trace

block: rename bio bi_rw to bi_opf

2016-08-07 14:41:02 -06:00

.gitignore

certs: add .gitignore to stop git nagging about x509_certificate_list

2015-10-21 15:18:35 +01:00

acct.c

…

async.c

async: export current_is_async()

2015-11-19 17:51:48 +01:00

audit_fsnotify.c

wrappers for ->i_mutex access

2016-01-22 18:04:28 -05:00

audit_tree.c

audit: cleanup prune_tree_thread

2016-04-04 09:46:47 -04:00

audit_watch.c

don't bother with ->d_inode->i_sb - it's always equal to ->d_sb

2016-04-10 17:11:51 -04:00

audit.c

Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit

2016-07-29 17:54:17 -07:00

audit.h

Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit

2016-07-29 17:54:17 -07:00

auditfilter.c

audit: add fields to exclude filter by reusing user filter

2016-06-27 11:01:00 -04:00

auditsc.c

Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit

2016-07-29 17:54:17 -07:00

backtracetest.c

…

bounds.c

…

capability.c

kernel: Add noaudit variant of ns_capable()

2016-06-06 20:16:18 +10:00

cgroup_freezer.c

cgroup: kill cgrp_ss_priv[CGROUP_CANFORK_COUNT] and friends

2015-12-03 10:24:08 -05:00

cgroup_pids.c

cgroup: Use lld instead of ld when printing pids controller events_limit

2016-06-21 15:03:36 -04:00

cgroup.c

Merge branch 'for-4.7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2016-07-29 14:29:04 -07:00

compat.c

compat: cleanup coding in compat_get_bitmap() and compat_put_bitmap()

2015-06-04 23:57:18 +02:00

configs.c

…

context_tracking.c

context_tracking: Switch to new static_branch API

2015-11-24 09:56:43 +01:00

cpu_pm.c

kernel/cpu_pm: fix cpu_cluster_pm_exit comment

2015-09-03 02:42:20 +02:00

cpu.c

timers/core: Correct callback order during CPU hot plug

2016-07-28 18:56:22 +02:00

cpuset.c

cpuset, mm: fix TIF_MEMDIE check in cpuset_change_task_nodemask

2016-07-28 16:07:41 -07:00

crash_dump.c

…

cred.c

cred: Reject inodes with invalid ids in set_create_file_as()

2016-06-30 18:05:09 -05:00

delayacct.c

kmemcg: account certain kmem allocations to memcg

2016-01-14 16:00:49 -08:00

dma.c

…

elfcore.c

…

exec_domain.c

…

exit.c

kernel/exit.c: quieten greatest stack depth printk

2016-08-02 19:35:23 -04:00

extable.c

kernel/extable.c: remove duplicated include

2015-09-10 13:29:01 -07:00

fork.c

mm: fix memcg stack accounting for sub-page stacks

2016-07-28 16:07:41 -07:00

freezer.c

freezer, oom: check TIF_MEMDIE on the correct task

2016-07-28 16:07:41 -07:00

futex_compat.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-01-20 17:09:18 -08:00

futex.c

futex: Calculate the futex key based on a tail page for file-based futexes

2016-06-08 19:23:54 +02:00

groups.c

…

hung_task.c

kernel/hung_task.c: use timeout diff when timeout is updated

2016-03-22 15:36:02 -07:00

irq_work.c

treewide: Remove old email address

2015-11-23 09:44:58 +01:00

jump_label.c

Merge tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2016-08-05 09:00:54 -04:00

kallsyms.c

kallsyms: add support for relative offsets in kallsyms address table

2016-03-15 16:55:16 -07:00

kcmp.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-01-20 17:09:18 -08:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

locking/qrwlock: Rename QUEUE_RWLOCK to QUEUED_RWLOCKS

2015-05-12 09:46:00 +02:00

Kconfig.preempt

…

kcov.c

kernel/kcov: unproxify debugfs file's fops

2016-06-15 04:56:35 -07:00

kexec_core.c

kexec: add restriction on kexec_load() segment sizes

2016-08-02 19:35:31 -04:00

kexec_file.c

kexec: introduce a protection mechanism for the crashkernel reserved memory

2016-05-23 17:04:14 -07:00

kexec_internal.h

kexec: move some memembers and definitions within the scope of CONFIG_KEXEC_FILE

2016-01-20 17:09:18 -08:00

kexec.c

kexec: allow architectures to override boot mapping

2016-08-02 19:35:27 -04:00

kmod.c

kmod: don't run async usermode helper as a child of kworker thread

2015-10-23 17:55:10 +09:00

kprobes.c

perf/x86/hw_breakpoints: Disallow kernel breakpoints unless kprobe-safe

2015-08-04 10:16:54 +02:00

ksysfs.c

kexec: add a kexec_crash_loaded() function

2016-08-02 19:35:30 -04:00

kthread.c

kernel/kthread.c:kthread_create_on_node(): clarify documentation

2015-09-04 16:54:41 -07:00

latencytop.c

sched/debug: Make schedstats a runtime tunable that is disabled by default

2016-02-09 11:54:23 +01:00

Makefile

ELF/MIPS build fix

2016-05-23 17:04:14 -07:00

membarrier.c

sys_membarrier(): system-wide memory barrier (generic, x86)

2015-09-11 15:21:34 -07:00

memremap.c

Merge tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

2016-07-28 17:38:16 -07:00

module_signing.c

KEYS: Move the point of trust determination to __key_link()

2016-04-11 22:43:43 +01:00

module-internal.h

…

module.c

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

2016-08-04 09:14:38 -04:00

notifier.c

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

2015-09-01 08:40:25 -07:00

nsproxy.c

cgroup: introduce cgroup namespaces

2016-02-16 13:04:58 -05:00

padata.c

kernel/padata.c: hide unused functions

2016-05-19 19:12:14 -07:00

panic.c

kexec: use core_param for crash_kexec_post_notifiers boot option

2016-08-02 19:35:29 -04:00

params.c

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

2015-11-09 15:53:39 -08:00

pid_namespace.c

…

pid.c

remove lots of IS_ERR_VALUE abuses

2016-05-27 15:26:11 -07:00

profile.c

profile: Convert to hotplug state machine

2016-07-15 10:41:42 +02:00

ptrace.c

tree-wide: replace config_enabled() with IS_ENABLED()

2016-08-04 08:50:07 -04:00

range.c

…

reboot.c

kexec: split kexec_load syscall from kexec core code

2015-09-10 13:29:01 -07:00

relay.c

relay: add global mode support for buffer-only channels

2016-08-02 19:35:41 -04:00

resource.c

/proc/iomem: only expose physical resource addresses to privileged users

2016-04-14 12:56:09 -07:00

seccomp.c

tree-wide: replace config_enabled() with IS_ENABLED()

2016-08-04 08:50:07 -04:00

signal.c

signals: Use hrtimer for sigtimedwait()

2016-07-07 10:35:07 +02:00

smp.c

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

2016-07-29 13:55:30 -07:00

smpboot.c

cpu/hotplug: Unpark smpboot threads from the state machine

2016-03-01 20:36:56 +01:00

smpboot.h

cpu/hotplug: Create hotplug threads

2016-03-01 20:36:56 +01:00

softirq.c

arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections

2016-03-25 16:37:42 -07:00

stacktrace.c

…

stop_machine.c

stop_machine: Touch_nmi_watchdog() after MULTI_STOP_PREPARE

2016-07-27 11:12:11 +02:00

sys_ni.c

vfs: add copy_file_range syscall and vfs helper

2015-12-01 14:00:53 -05:00

sys.c

prctl: make PR_SET_THP_DISABLE wait for mmap_sem killable

2016-05-23 17:04:14 -07:00

sysctl_binary.c

kernel/sysctl_binary.c: use generic UUID library

2016-05-20 17:58:30 -07:00

sysctl.c

printk: add kernel parameter to control writes to /dev/kmsg

2016-08-02 19:35:06 -04:00

task_work.c

task_work: use READ_ONCE/lockless_dereference, avoid pi_lock if !task_works

2016-08-02 19:35:02 -04:00

taskstats.c

taskstats: use the libnl API to align nlattr on 64-bit

2016-04-23 20:13:25 -04:00

test_kprobes.c

…

torture.c

torture: Stop onoff task if there is only one cpu

2016-06-14 16:03:28 -07:00

tracepoint.c

kernel/...: convert pr_warning to pr_warn

2016-03-22 15:36:02 -07:00

tsacct.c

time, acct: Drop irq save & restore from __acct_update_integrals()

2016-02-29 09:53:09 +01:00

uid16.c

…

up.c

…

user_namespace.c

fs: Limit file caps to the user namespace of the super block

2016-06-24 10:40:31 -05:00

user-return-notifier.c

…

user.c

…

utsname_sysctl.c

…

utsname.c

…

watchdog.c

Revert "perf/x86/intel, watchdog: Switch NMI watchdog to ref cycles on x86"

2016-07-10 20:58:36 +02:00

workqueue_internal.h

sched/core: Get rid of 'cpu' argument in wq_worker_sleeping()

2016-03-02 10:28:47 -05:00

workqueue.c

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

2016-07-29 13:55:30 -07:00