Rafael J. Wysocki 14790abc87 cpuidle: menu: Avoid discarding useful information ... [ Upstream commit 85975daeaa ] When giving up on making a high-confidence prediction, get_typical_interval() always returns UINT_MAX which means that the next idle interval prediction will be based entirely on the time till the next timer. However, the information represented by the most recent intervals may not be completely useless in those cases. Namely, the largest recent idle interval is an upper bound on the recently observed idle duration, so it is reasonable to assume that the next idle duration is unlikely to exceed it. Moreover, this is still true after eliminating the suspected outliers if the sample set still under consideration is at least as large as 50% of the maximum sample set size. Accordingly, make get_typical_interval() return the current maximum recent interval value in that case instead of UINT_MAX. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reported-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Reviewed-by: Christian Loehle <christian.loehle@arm.com> Tested-by: Christian Loehle <christian.loehle@arm.com> Tested-by: Aboorva Devarajan <aboorvad@linux.ibm.com> Link: https://patch.msgid.link/7770672.EvYhyI6sBW@rjwysocki.net Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-06-04 14:38:00 +02:00
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governors	cpuidle: menu: Avoid discarding useful information	2025-06-04 14:38:00 +02:00
coupled.c
cpuidle-arm.c
cpuidle-at91.c
cpuidle-big_little.c
cpuidle-calxeda.c
cpuidle-clps711x.c
cpuidle-cps.c
cpuidle-exynos.c
cpuidle-haltpoll.c
cpuidle-kirkwood.c
cpuidle-mvebu-v7.c
cpuidle-powernv.c
cpuidle-psci-domain.c	cpuidle: psci: Iterate backwards over list in psci_pd_remove()	2023-03-22 13:31:36 +01:00
cpuidle-psci.c
cpuidle-psci.h
cpuidle-pseries.c	powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT	2023-09-19 12:22:42 +02:00
cpuidle-qcom-spm.c
cpuidle-tegra.c
cpuidle-ux500.c
cpuidle-zynq.c
cpuidle.c
cpuidle.h
driver.c	cpuidle: Avoid potential overflow in integer multiplication	2024-04-13 13:01:43 +02:00
dt_idle_states.c
dt_idle_states.h
governor.c
Kconfig
Kconfig.arm
Kconfig.mips
Kconfig.powerpc
Makefile
poll_state.c
sysfs.c