Qais Yousef 7a17e1db12 sched/sugov: Ignore 'busy' filter when rq is capped by uclamp_max ... sugov_update_single_{freq, perf}() contains a 'busy' filter that ensures we don't bring the frqeuency down if there's no idle time (CPU is busy). The problem is that with uclamp_max we will have scenarios where a busy task is capped to run at a lower frequency and this filter prevents applying the capping when this task starts running. We handle this by skipping the filter when uclamp is enabled and the rq is being capped by uclamp_max. We introduce a new function uclamp_rq_is_capped() to help detecting when this capping is taking effect. Some code shuffling was required to allow using cpu_util_{cfs, rt}() in this new function. On 2 Core SMT2 Intel laptop I see: Without this patch: uclampset -M 0 sysbench --test=cpu --threads = 4 run produces a score of ~3200 consistently. Which is the highest possible. Compiling the kernel also results in frequency running at max 3.1GHz all the time - running uclampset -M 400 to cap it has no effect without this patch. With this patch: uclampset -M 0 sysbench --test=cpu --threads = 4 run produces a score of ~1100 with some outliers in ~1700. Uclamp max aggregates the performance requirements, so having high values sometimes is expected if some other task happens to require that frequency starts running at the same time. When compiling the kernel with uclampset -M 400 I can see the frequencies mostly in the ~2GHz region. Helpful to conserve power and prevent heating when not plugged in. Fixes: 982d9cdc22 ("sched/cpufreq, sched/uclamp: Add clamps for FAIR and RT tasks") Signed-off-by: Qais Yousef <qais.yousef@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20211216225320.2957053-2-qais.yousef@arm.com		2022-01-27 12:57:19 +01:00
..
bpf	bpf: Fix ringbuf memory type confusion when passing to helpers	2022-01-19 01:21:46 +01:00
cgroup	Merge branch 'for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2022-01-11 09:14:37 -08:00
configs	configs: introduce debug.config for CI-like setup	2022-01-20 08:52:55 +02:00
debug	kdb: Adopt scheduler's task classification	2021-11-03 17:21:37 +00:00
dma	hyperv-next for 5.17	2022-01-16 15:53:00 +02:00
entry	entry: Snapshot thread flags	2021-12-01 00:06:43 +01:00
events	Peter Zijlstra says:	2022-01-12 16:26:58 -08:00
futex	Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2022-01-17 05:49:30 +02:00
gcov	gcov: Remove compiler version check	2021-12-02 17:25:21 +09:00
irq	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
kcsan	KCSAN updates for v5.17	2022-01-11 09:51:26 -08:00
livepatch	Livepatching changes for 5.17	2022-01-16 10:08:13 +02:00
locking	locking/rwlocks: introduce write_lock_nested	2022-01-22 08:33:37 +02:00
power	PM: hibernate: Allow ACPI hardware signature to be honoured	2021-12-08 16:06:10 +01:00
printk	printk: fix build warning when CONFIG_PRINTK=n	2022-01-22 08:33:36 +02:00
rcu	Merge branch 'akpm' (patches from Andrew)	2022-01-15 20:37:06 +02:00
sched	sched/sugov: Ignore 'busy' filter when rq is capped by uclamp_max	2022-01-27 12:57:19 +01:00
time	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
trace	ftrace: Fix s390 breakage from sorting mcount tables	2022-01-23 08:07:02 +02:00
.gitignore
acct.c	kernel: remove spurious blkdev.h includes	2021-10-18 06:17:01 -06:00
async.c
audit_fsnotify.c	fsnotify: clarify contract for create event hooks	2021-10-27 12:32:34 +02:00
audit_tree.c	audit: use struct_size() helper in kmalloc()	2021-12-14 17:39:42 -05:00
audit_watch.c	\n	2021-11-06 16:43:20 -07:00
audit.c	audit/stable-5.17 PR 20220110	2022-01-11 13:08:21 -08:00
audit.h	audit/stable-5.16 PR 20211101	2021-11-01 21:17:39 -07:00
auditfilter.c	audit/stable-5.17 PR 20220110	2022-01-11 13:08:21 -08:00
auditsc.c	lsm: security_task_getsecid_subj() -> security_current_getsecid_subj()	2021-11-22 17:52:47 -05:00
backtracetest.c
bounds.c
capability.c
cfi.c	cfi: Use rcu_read_{un}lock_sched_notrace	2021-08-11 13:11:12 -07:00
compat.c	arch: remove compat_alloc_user_space	2021-09-08 15:32:35 -07:00
configs.c
context_tracking.c
cpu_pm.c	PM: cpu: Make notifier chain use a raw_spinlock_t	2021-08-16 18:55:32 +02:00
cpu.c	sched/scs: Reset task stack state in bringup_cpu()	2021-11-24 12:20:27 +01:00
crash_core.c	kernel/crash_core: suppress unknown crashkernel parameter warning	2021-12-25 12:20:55 -08:00
crash_dump.c
cred.c	ucounts: In set_cred_ucounts assume new->ucounts is non-NULL	2021-10-20 10:45:34 -05:00
delayacct.c	delayacct: track delays from memory compact	2022-01-20 08:52:55 +02:00
dma.c
exec_domain.c
exit.c	exit: Fix the exit_code for wait_task_zombie	2022-01-08 12:43:57 -06:00
extable.c	extable: use is_kernel_text() helper	2021-11-09 10:02:51 -08:00
fail_function.c
fork.c	Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2022-01-17 05:49:30 +02:00
freezer.c	sched: Add get_current_state()	2021-06-18 11:43:08 +02:00
gen_kheaders.sh
groups.c
hung_task.c	hung_task: move hung_task sysctl interface to hung_task.c	2022-01-22 08:33:34 +02:00
iomem.c
irq_work.c	irq_work: Also rcuwait for !IRQ_WORK_HARD_IRQ on PREEMPT_RT	2021-10-15 11:25:18 +02:00
jump_label.c	jump_label: Fix jump_label_text_reserved() vs __init	2021-07-05 10:46:20 +02:00
kallsyms.c	Livepatching changes for 5.17	2022-01-16 10:08:13 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks	locking/rwlock: Provide RT variant	2021-08-17 17:50:51 +02:00
Kconfig.preempt	preempt: Restore preemption model selection configs	2021-11-11 13:09:33 +01:00
kcov.c	kcov: replace local_irq_save() with a local_lock_t	2021-11-09 10:02:52 -08:00
kexec_core.c	exit: Move oops specific logic from do_exit into make_task_dead	2021-12-13 12:04:45 -06:00
kexec_elf.c
kexec_file.c	memblock: add MEMBLOCK_DRIVER_MANAGED to mimic IORESOURCE_SYSRAM_DRIVER_MANAGED	2021-11-06 13:30:42 -07:00
kexec_internal.h
kexec.c	kexec: avoid compat_alloc_user_space	2021-09-08 15:32:34 -07:00
kheaders.c
kmod.c
kprobes.c	kprobe: move sysctl_kprobes_optimization to kprobes.c	2022-01-22 08:33:36 +02:00
ksysfs.c
kthread.c	Merge branch 'akpm' (patches from Andrew)	2022-01-20 10:41:01 +02:00
latencytop.c
Makefile	module: add in-kernel support for decompressing	2022-01-11 18:45:02 -08:00
module_decompress.c	kernel: Fix spelling mistake "compresser" -> "compressor"	2022-01-13 07:17:47 -08:00
module_signature.c
module_signing.c
module-internal.h	module: add in-kernel support for decompressing	2022-01-11 18:45:02 -08:00
module.c	Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux	2022-01-17 07:32:51 +02:00
notifier.c	notifier: Return an error when a callback has already been registered	2021-12-29 10:37:33 +01:00
nsproxy.c	memcg: enable accounting for new namesapces and struct nsproxy	2021-09-03 09:58:12 -07:00
padata.c	padata: Remove repeated verbose license text	2021-08-27 16:30:18 +08:00
panic.c	panic: remove oops_id	2022-01-20 08:52:55 +02:00
params.c	kobject: remove kset from struct kset_uevent_ops callbacks	2021-12-28 11:26:18 +01:00
pid_namespace.c	memcg: enable accounting for new namesapces and struct nsproxy	2021-09-03 09:58:12 -07:00
pid.c	pid: add pidfd_get_task() helper	2021-10-14 13:29:18 +02:00
profile.c	exit: Remove profile_handoff_task	2022-01-08 12:43:57 -06:00
ptrace.c	ptrace: Remove second setting of PT_SEIZED in ptrace_attach	2022-01-08 12:43:57 -06:00
range.c
reboot.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2021-11-12 11:53:16 -08:00
regset.c
relay.c
resource_kunit.c
resource.c	proc: remove PDE_DATA() completely	2022-01-22 08:33:37 +02:00
rseq.c	KVM: rseq: Update rseq when processing NOTIFY_RESUME on xfer to KVM guest	2021-09-22 10:24:01 -04:00
scftorture.c	scftorture: Always log error message	2021-12-07 16:36:17 -08:00
scs.c	scs: Release kasan vmalloc poison in scs_free process	2021-09-30 09:37:27 +01:00
seccomp.c	Merge branch 'exit-cleanups-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2021-09-01 14:52:05 -07:00
signal.c	Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2022-01-17 05:49:30 +02:00
smp.c	sched: Improve wake_up_all_idle_cpus() take #2	2021-10-22 15:32:46 +02:00
smpboot.c	smpboot: Replace deprecated CPU-hotplug functions.	2021-08-10 14:57:42 +02:00
smpboot.h
softirq.c	timers/nohz: Last resort update jiffies on nohz_full IRQ entry	2021-12-02 15:07:22 +01:00
stackleak.c	stackleak: move stack_erasing sysctl to stackleak.c	2022-01-22 08:33:35 +02:00
stacktrace.c	stacktrace: move filter_irq_stacks() to kernel/stacktrace.c	2021-11-06 13:30:43 -07:00
static_call.c	static_call: Fix static_call_text_reserved() vs __init	2021-07-05 10:46:33 +02:00
stop_machine.c
sys_ni.c	mm/mempolicy: wire up syscall set_mempolicy_home_node	2022-01-15 16:30:30 +02:00
sys.c	Merge branch 'akpm' (patches from Andrew)	2022-01-20 10:41:01 +02:00
sysctl-test.c	kernel/sysctl-test: Remove some casts which are no-longer required	2021-06-23 16:41:24 -06:00
sysctl.c	sysctl: returns -EINVAL when a negative value is passed to proc_doulongvec_minmax	2022-01-22 08:33:37 +02:00
task_work.c
taskstats.c
torture.c	locktorture,rcutorture,torture: Always log error message	2021-12-07 16:36:17 -08:00
tracepoint.c	tracepoint: Fix kerneldoc comments	2021-08-16 11:39:51 -04:00
tsacct.c	taskstats: Cleanup the use of task->exit_code	2022-01-08 12:43:57 -06:00
ucount.c	ucounts: Fix rlimit max values check	2021-12-09 15:37:18 -06:00
uid16.c
uid16.h
umh.c
up.c
user_namespace.c	memcg: enable accounting for new namesapces and struct nsproxy	2021-09-03 09:58:12 -07:00
user-return-notifier.c
user.c	fs/epoll: use a per-cpu counter for user's watches count	2021-09-08 11:50:27 -07:00
usermode_driver.c	Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2021-07-03 11:41:14 -07:00
utsname_sysctl.c
utsname.c
watch_queue.c
watchdog_hld.c
watchdog.c	watchdog: move watchdog sysctl interface to watchdog.c	2022-01-22 08:33:34 +02:00
workqueue_internal.h	workqueue: Assign a color to barrier work items	2021-08-17 07:49:10 -10:00
workqueue.c	Merge branch 'workqueue/for-5.16-fixes' into workqueue/for-5.17	2022-01-10 07:54:04 -10:00