Ionut Nechita (Sunlight Linux) 56534673ce tick/nohz: Optimize check_tick_dependency() with early return ...

There is no point in iterating through individual tick dependency bits when
the tick_stop tracepoint is disabled, which is the common case.

When the trace point is disabled, return immediately based on the atomic
value being zero or non-zero, skipping the per-bit evaluation.

This optimization improves the hot path performance of tick dependency
checks across all contexts (idle and non-idle), not just nohz_full CPUs.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ionut Nechita (Sunlight Linux) <sunlightlinux@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260128074558.15433-3-sunlightlinux@gmail.com

2026-01-30 22:13:13 +01:00

..

alarmtimer.c

time: Fix spelling mistakes in comments

2025-09-21 10:02:02 +02:00

clockevents.c

tick: Do not set device to detached state in tick_shutdown()

2025-09-09 13:39:00 +02:00

clocksource-wdtest.c

clocksource/wdtest: Print time values for short udelay(1)

2025-01-15 19:49:13 +01:00

clocksource.c

time: Fix spelling mistakes in comments

2025-09-21 10:02:02 +02:00

hrtimer.c

hrtimer: Drop _tv64() helpers

2026-01-13 11:05:49 +01:00

itimer.c

timers/itimer: Avoid direct access to hrtimer clockbase

2025-09-09 12:27:17 +02:00

jiffies.c

sysctl: Move proc_doulongvec_ms_jiffies_minmax to kernel/time/jiffies.c

2025-11-27 15:45:37 +01:00

Kconfig

time: Introduce auxiliary POSIX clocks

2025-06-19 14:28:22 +02:00

Makefile

time: Build generic update_vsyscall() only with generic time vDSO

2025-09-04 11:23:50 +02:00

namespace.c

ns: drop custom reference count initialization for initial namespaces

2025-11-11 10:01:32 +01:00

ntp_internal.h

ntp: Rename __do_adjtimex() to ntp_adjtimex()

2025-06-19 14:28:23 +02:00

ntp.c

ntp: Use ktime_get_ntp_seconds()

2025-06-19 14:28:24 +02:00

posix-clock.c

Merge tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

2025-03-26 21:48:21 -07:00

posix-cpu-timers.c

hrtimer: Store time as ktime_t in restart block

2025-11-14 16:31:19 +01:00

posix-stubs.c

posix-timers: Get rid of [COMPAT_]SYS_NI() uses

2023-12-20 21:30:27 -08:00

posix-timers.c

Merge tag 'timers-core-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-12-02 09:58:33 -08:00

posix-timers.h

timekeeping: Add minimal posix-timers support for auxiliary clocks

2025-06-27 20:13:12 +02:00

sched_clock.c

time/sched_clock: Use ACCESS_PRIVATE() to evaluate hrtimer::function

2026-01-13 18:08:57 +01:00

sleep_timeout.c

treewide, timers: Rename from_timer() to timer_container_of()

2025-06-08 09:07:37 +02:00

test_udelay.c

time: Add MODULE_DESCRIPTION() to time test modules

2024-06-03 11:18:50 +02:00

tick-broadcast-hrtimer.c

time: Switch to hrtimer_setup()

2025-02-18 10:32:33 +01:00

tick-broadcast.c

tick/broadcast: Add kernel-doc for function parameters

2025-01-15 19:49:14 +01:00

tick-common.c

tick: Do not set device to detached state in tick_shutdown()

2025-09-09 13:39:00 +02:00

tick-internal.h

tick: Do not set device to detached state in tick_shutdown()

2025-09-09 13:39:00 +02:00

tick-legacy.c

timekeeping: remove xtime_update

2020-10-30 21:57:07 +01:00

tick-oneshot.c

time: tick-oneshot: Add missing Return and parameter descriptions to kernel-doc

2025-11-14 20:17:44 +01:00

tick-sched.c

tick/nohz: Optimize check_tick_dependency() with early return

2026-01-30 22:13:13 +01:00

tick-sched.h

tick/sched: Fix struct tick_sched doc warnings

2024-04-01 10:36:35 +02:00

time_test.c

time: Add MODULE_DESCRIPTION() to time test modules

2024-06-03 11:18:50 +02:00

time.c

time: export timespec64_add_safe() symbol

2025-09-03 16:51:08 -07:00

timeconst.bc

time: Add SPDX license identifiers

2018-11-23 11:51:20 +01:00

timeconv.c

time: Improve performance of time64_to_tm()

2021-06-24 11:51:59 +02:00

timecounter.c

time/timecounter: Inline timecounter_cyc2time()

2025-12-15 20:16:49 +01:00

timekeeping_debug.c

timekeeping: Add percpu counter for tracking floor swap events

2024-10-10 10:20:46 +02:00

timekeeping_internal.h

timekeeping: Provide ktime_get_ntp_seconds()

2025-06-19 14:28:23 +02:00

timekeeping.c

Merge tag 'soc-drivers-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2025-12-05 17:29:04 -08:00

timekeeping.h

Merge tag 'asm-generic-timers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2020-12-16 00:07:17 -08:00

timer_list.c

hrtimer: Remove hrtimer_clock_base:: Get_time

2025-09-09 12:27:18 +02:00

timer_migration.c

timers/migration: Exclude isolated cpus from hierarchy

2025-11-20 20:17:32 +01:00

timer_migration.h

timers/migration: Rename 'online' bit to 'available'

2025-11-20 20:17:31 +01:00

timer.c

Merge tag 'core-core-2025-12-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-12-02 10:18:49 -08:00

vsyscall.c

vdso/vsyscall: Avoid slow division loop in auxiliary clock update

2025-09-03 11:55:11 +02:00