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ANDROID: schedutil: add vendor hook for adjusting util to freq calculation

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Currently, the frequency is calculated by max freq * 1.25 * util / max cap.
Add a vendor hook to adjust the frequency when the calculation
overestimate.

android_vh_map_util_freq
	adjust util to freq calculation

Bug: 177845439

Signed-off-by: Yun Hsiang <yun.hsiang@mediatek.com>
Change-Id: I9aa9079f00af7d3380b19f2fe21b75cddd107d15
(cherry picked from commit 3122e3ec9672036384304fdeaa1b1815f60ba817)
(cherry picked from commit a2d89d4f3a)
This commit is contained in:
Yun Hsiang
2021-01-13 17:00:22 +08:00
committed by Qiankun Wang
parent f46afe0c21
commit b77eeebb3c
3 changed files with 14 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/trace/hooks/sched.h
View File

@@ -332,6 +332,11 @@ DECLARE_HOOK(android_vh_sched_pelt_multiplier,
TP_PROTO(unsigned int old, unsigned int cur, int *ret),
TP_ARGS(old, cur, ret));
DECLARE_HOOK(android_vh_map_util_freq,
TP_PROTO(unsigned long util, unsigned long freq,
unsigned long cap, unsigned long *next_freq),
TP_ARGS(util, freq, cap, next_freq));
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_SCHED_H */

9
kernel/sched/cpufreq_schedutil.c
View File

@@ -6,6 +6,8 @@
* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
*/
#include <trace/hooks/sched.h>
#define IOWAIT_BOOST_MIN (SCHED_CAPACITY_SCALE / 8)
struct sugov_tunables {
@@ -143,9 +145,14 @@ static unsigned int get_next_freq(struct sugov_policy *sg_policy,
struct cpufreq_policy *policy = sg_policy->policy;
unsigned int freq = arch_scale_freq_invariant() ?
policy->cpuinfo.max_freq : policy->cur;
unsigned long next_freq = 0;
util = map_util_perf(util);
freq = map_util_freq(util, freq, max);
trace_android_vh_map_util_freq(util, freq, max, &next_freq);
if (next_freq)
freq = next_freq;
else
freq = map_util_freq(util, freq, max);
if (freq == sg_policy->cached_raw_freq && !sg_policy->need_freq_update)
return sg_policy->next_freq;

1
kernel/sched/vendor_hooks.c
View File

@@ -86,3 +86,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_set_wake_flags);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_find_new_ilb);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_find_energy_efficient_cpu);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_sched_pelt_multiplier);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_map_util_freq);