Vikram Mulukutla eac9d4d393 sched: walt: Optimize cycle counter reads ...

The cycle counter read is a bit of an expensive operation and requires
locking across all CPUs in a frequency domain. Optimize this by
returning the same value if the delta between two reads is zero i.e
two reads are done in the same sched context for the same CPU.

Change-Id: I99da5a704d3652f53c8564ba7532783d3288f227
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
[pkondeti@codeaurora.org: limit the optimization to the
same CPU for the sched context]
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>

2018-04-24 11:50:17 -07:00

..

bpf

This is the 4.14.31 stable release

2018-03-29 11:31:39 +02:00

cgroup

This is the 4.14.31 stable release

2018-03-29 11:31:39 +02:00

configs

Merge remote-tracking branch 'remotes/origin/tmp-c3a2eda' into msm-4.14

2018-02-02 12:50:09 -08:00

debug

This is the 4.14.6 stable release

2018-01-04 13:47:18 +01:00

events

Merge android-4.14.35 (07e1389) into msm-4.14

2018-04-19 08:58:41 -07:00

gcov

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

irq

Merge remote-tracking branch 'remotes/origin/tmp-85ab9a0' into msm-4.14

2018-03-05 09:44:16 -08:00

livepatch

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

locking

Merge android-4.14.29 (45c8dbe) into msm-4.14

2018-03-21 10:16:53 -07:00

power

Merge remote-tracking branch 'remotes/origin/tmp-ad490df' into msm-4.14

2018-01-09 15:41:23 -08:00

printk

Merge remote-tracking branch 'remotes/origin/tmp-39dae59' into msm-next

2017-11-06 11:37:20 -08:00

rcu

rcu: Create RCU-specific workqueues with rescuers

2018-04-16 12:35:40 +05:30

sched

sched: walt: Optimize cycle counter reads

2018-04-24 11:50:17 -07:00

time

Merge "alarmtimer: add rtc irq support for alarm" into msm-4.14

2018-04-12 14:29:42 -07:00

trace

Merge "trace/irq: Add trace point to track IRQs disable callers"

2018-04-19 00:15:07 -07:00

.gitignore

…

acct.c

kernel/acct.c: fix the acct->needcheck check in check_free_space()

2018-01-10 09:31:17 +01:00

async.c

kernel/async.c: revert "async: simplify lowest_in_progress()"

2018-02-16 20:23:05 +01:00

audit_fsnotify.c

Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2017-05-03 11:05:15 -07:00

audit_tree.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

audit_watch.c

audit/stable-4.13 PR 20170816

2017-08-16 16:48:34 -07:00

audit.c

audit: ensure that 'audit=1' actually enables audit for PID 1

2017-12-17 15:08:00 +01:00

audit.h

ipc: mqueue: Replace timespec with timespec64

2017-09-03 20:21:24 -04:00

auditfilter.c

audit: kernel generated netlink traffic should have a portid of 0

2017-05-02 10:16:05 -04:00

auditsc.c

Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2017-09-14 17:37:26 -07:00

backtracetest.c

…

bounds.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

capability.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat.c

semtimedop(): move compat to native

2017-07-15 20:46:47 -04:00

configs.c

…

context_tracking.c

…

cpu_pm.c

lpm-levels: Do not disable non-sec interrupts in suspend

2018-01-09 12:24:03 -08:00

cpu.c

cpu-hotplug: Keep atleast 1 online and un-isolated CPU

2018-01-23 13:05:46 -08:00

crash_core.c

kdump: write correct address of mem_section into vmcoreinfo

2018-01-17 09:45:27 +01:00

crash_dump.c

…

cred.c

doc: ReSTify credentials.txt

2017-05-18 10:30:19 -06:00

delayacct.c

delayacct: Account blkio completion on the correct task

2018-01-23 19:58:13 +01:00

dma.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

elfcore.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

exec_domain.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

exit.c

Merge android-4.14.35 (07e1389) into msm-4.14

2018-04-19 08:58:41 -07:00

extable.c

extable: Enable RCU if it is not watching in kernel_text_address()

2017-09-23 16:50:20 -04:00

fork.c

Merge remote-tracking branch 'remotes/origin/tmp-474d3c4' into msm-4.14

2018-02-23 15:37:55 -08:00

freezer.c

…

futex_compat.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

futex.c

futex: Fix OWNER_DEAD fixup

2018-02-03 17:38:47 +01:00

groups.c

kernel: make groups_sort calling a responsibility group_info allocators

2017-12-20 10:10:18 +01:00

hung_task.c

kernel/hung_task.c: defer showing held locks

2017-05-08 17:15:10 -07:00

irq_work.c

…

jump_label.c

jump_label: Invoke jump_label_test() via early_initcall()

2017-12-14 09:53:13 +01:00

kallsyms.c

kernel/kallsyms.c: replace all_var with IS_ENABLED(CONFIG_KALLSYMS_ALL)

2017-07-10 16:32:34 -07:00

kcmp.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

…

kcov.c

kcov: detect double association with a single task

2018-02-25 11:07:50 +01:00

kexec_core.c

x86/mm, kexec: Allow kexec to be used with SME

2017-07-18 11:38:04 +02:00

kexec_file.c

kexec_file: adjust declaration of kexec_purgatory

2017-07-12 16:26:02 -07:00

kexec_internal.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kexec.c

kdump: protect vmcoreinfo data under the crash memory

2017-07-12 16:26:00 -07:00

kmod.c

kmod: move #ifdef CONFIG_MODULES wrapper to Makefile

2017-09-08 18:26:51 -07:00

kprobes.c

kprobes: Use synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT=y

2017-12-10 13:40:40 +01:00

ksysfs.c

kexec: move vmcoreinfo out of the kernel's .bss section

2017-07-12 16:25:59 -07:00

kthread.c

kernel/kthread.c: kthread_worker: don't hog the cpu

2017-08-31 16:33:15 -07:00

latencytop.c

…

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

memremap.c

mm: Fix memory size alignment in devm_memremap_pages_release()

2018-02-22 15:42:27 +01:00

module_signing.c

…

module-internal.h

…

module.c

module/retpoline: Warn about missing retpoline in module

2018-02-07 11:12:18 -08:00

notifier.c

…

nsproxy.c

perf: Add PERF_RECORD_NAMESPACES to include namespaces related info

2017-03-13 15:57:41 -03:00

padata.c

padata: Avoid nested calls to cpus_read_lock() in pcrypt_init_padata()

2017-05-26 10:10:37 +02:00

panic.c

soc: qcom: Register default dump entries to minidump table

2018-04-17 11:43:37 -07:00

params.c

kernel/params.c: improve STANDARD_PARAM_DEF readability

2017-10-03 17:54:26 -07:00

pid_namespace.c

userns,pidns: Verify the userns for new pid namespaces

2017-07-20 07:43:58 -05:00

pid.c

pids: make task_tgid_nr_ns() safe

2017-08-21 12:47:31 -07:00

profile.c

…

ptrace.c

signal: Remove kernel interal si_code magic

2017-07-24 14:30:28 -05:00

range.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

reboot.c

…

relay.c

kernel/relay.c: revert "kernel/relay.c: fix potential memory leak"

2018-02-16 20:23:05 +01:00

resource.c

…

seccomp.c

locking/barriers: Convert users of lockless_dereference() to READ_ONCE()

2017-12-25 14:26:21 +01:00

signal.c

kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK

2018-02-22 15:42:23 +01:00

smp.c

Merge remote-tracking branch 'origin/tmp-2bd6bf0' into msm-next

2017-10-09 16:05:18 -07:00

smpboot.c

sched: Add snapshot of Window Assisted Load Tracking (WALT)

2018-01-22 09:00:37 -08:00

smpboot.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

softirq.c

Merge remote-tracking branch 'remotes/origin/tmp-474d3c4' into msm-4.14

2018-02-23 15:37:55 -08:00

stacktrace.c

…

stop_machine.c

stop_machine: Provide stop_machine_cpuslocked()

2017-05-26 10:10:36 +02:00

sys_ni.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

sys.c

ANDROID: mm: add a field to store names for private anonymous memory

2017-12-18 21:11:22 +05:30

sysctl_binary.c

netfilter: nf_defrag_ipv4: Add sysctl to disable per interface

2018-01-21 22:20:24 -07:00

sysctl.c

trace/irq: Add trace point to track IRQs disable callers

2018-04-17 12:08:22 -07:00

task_work.c

locking/barriers: Convert users of lockless_dereference() to READ_ONCE()

2017-12-25 14:26:21 +01:00

taskstats.c

taskstats: add e/u/stime for TGID command

2017-05-08 17:15:12 -07:00

test_kprobes.c

…

torture.c

torture: Fix typo suppressing CPU-hotplug statistics

2017-07-25 13:04:45 -07:00

tracepoint.c

…

tsacct.c

…

ucount.c

…

uid16.c

kernel: make groups_sort calling a responsibility group_info allocators

2017-12-20 10:10:18 +01:00

umh.c

kmod: split out umh code into its own file

2017-09-08 18:26:50 -07:00

up.c

smp: Avoid using two cache lines for struct call_single_data

2017-08-29 15:14:38 +02:00

user_namespace.c

userns,pidns: Verify the userns for new pid namespaces

2017-07-20 07:43:58 -05:00

user-return-notifier.c

…

user.c

ANDROID: proc: Add /proc/uid directory

2018-04-12 13:00:33 -07:00

utsname_sysctl.c

…

utsname.c

…

watchdog_hld.c

Merge branch 'linus' into core/urgent, to pick up dependent commits

2017-11-04 08:53:04 +01:00

watchdog.c

watchdog: Add support for cpu isolation

2018-01-23 13:02:09 -08:00

workqueue_internal.h

Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2017-11-06 12:26:49 -08:00

workqueue.c

Merge "Merge remote-tracking branch 'remotes/origin/tmp-df0daba' into msm-4.14" into msm-4.14

2018-03-17 14:54:33 -07:00