mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 21:25:20 +07:00
a4f9a0e51b
With commit
bef69dd878 ("sched/cpufreq: Move the cfs_rq_util_change() call to cpufreq_update_util()")
update_load_avg() has become the central point for calling cpufreq
(not including the update of blocked load). This change helps to
simplify further the number of calls to cpufreq_update_util() and to
remove last redundant ones. With update_load_avg(), we are now sure
that cpufreq_update_util() will be called after every task attachment
to a cfs_rq and especially after propagating this event down to the
util_avg of the root cfs_rq, which is the level that is used by
cpufreq governors like schedutil to set the frequency of a CPU.
The SCHED_CPUFREQ_MIGRATION flag forces an early call to cpufreq when
the migration happens in a cgroup whereas util_avg of root cfs_rq is
not yet updated and this call is duplicated with the one that happens
immediately after when the migration event reaches the root cfs_rq.
The dedicated flag SCHED_CPUFREQ_MIGRATION is now useless and can be
removed. The interface of attach_entity_load_avg() can also be
simplified accordingly.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lkml.kernel.org/r/1579083620-24943-1-git-send-email-vincent.guittot@linaro.org
34 lines
904 B
C
34 lines
904 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_SCHED_CPUFREQ_H
|
|
#define _LINUX_SCHED_CPUFREQ_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* Interface between cpufreq drivers and the scheduler:
|
|
*/
|
|
|
|
#define SCHED_CPUFREQ_IOWAIT (1U << 0)
|
|
|
|
#ifdef CONFIG_CPU_FREQ
|
|
struct cpufreq_policy;
|
|
|
|
struct update_util_data {
|
|
void (*func)(struct update_util_data *data, u64 time, unsigned int flags);
|
|
};
|
|
|
|
void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data,
|
|
void (*func)(struct update_util_data *data, u64 time,
|
|
unsigned int flags));
|
|
void cpufreq_remove_update_util_hook(int cpu);
|
|
bool cpufreq_this_cpu_can_update(struct cpufreq_policy *policy);
|
|
|
|
static inline unsigned long map_util_freq(unsigned long util,
|
|
unsigned long freq, unsigned long cap)
|
|
{
|
|
return (freq + (freq >> 2)) * util / cap;
|
|
}
|
|
#endif /* CONFIG_CPU_FREQ */
|
|
|
|
#endif /* _LINUX_SCHED_CPUFREQ_H */
|