From 13b036b5ef97877190f73284861f06164d3084cf Mon Sep 17 00:00:00 2001
From: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Date: Tue, 11 May 2021 10:43:20 -0700
Subject: [PATCH] sched: Add util busy hist sysctl tunables

Add util_busy_hist sysctl tunables which solely
look at the sum of cpu_util across CPUs as a metric for
LPM biasing on any/all CPUs.

Change-Id: Ib981c21a58059ef02772ee797808c5f30547a688
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
---
 kernel/sched/walt/sysctl.c | 34 ++++++++++++++++++++++++++++++++++
 kernel/sched/walt/walt.h   |  3 +++
 2 files changed, 37 insertions(+)

diff --git a/kernel/sched/walt/sysctl.c b/kernel/sched/walt/sysctl.c
index 818117c03616..a005b3004413 100644
--- a/kernel/sched/walt/sysctl.c
+++ b/kernel/sched/walt/sysctl.c
@@ -34,6 +34,9 @@ unsigned int sysctl_sched_coloc_busy_hyst_enable_cpus;
 unsigned int sysctl_sched_coloc_busy_hyst_cpu[WALT_NR_CPUS];
 unsigned int sysctl_sched_coloc_busy_hyst_max_ms;
 unsigned int sysctl_sched_coloc_busy_hyst_cpu_busy_pct[WALT_NR_CPUS];
+unsigned int sysctl_sched_util_busy_hyst_enable_cpus;
+unsigned int sysctl_sched_util_busy_hyst_cpu[WALT_NR_CPUS];
+unsigned int sysctl_sched_util_busy_hyst_cpu_util[WALT_NR_CPUS];
 unsigned int sysctl_sched_boost;
 unsigned int sysctl_sched_wake_up_idle[2];
 unsigned int sysctl_input_boost_ms;
@@ -614,6 +617,33 @@ struct ctl_table walt_table[] = {
 		.extra1		= SYSCTL_ZERO,
 		.extra2		= &one_hundred,
 	},
+	{
+		.procname	= "sched_util_busy_hysteresis_enable_cpus",
+		.data		= &sysctl_sched_util_busy_hyst_enable_cpus,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= sched_busy_hyst_handler,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= &two_hundred_fifty_five,
+	},
+	{
+		.procname	= "sched_util_busy_hyst_cpu_ns",
+		.data		= &sysctl_sched_util_busy_hyst_cpu,
+		.maxlen		= sizeof(unsigned int) * WALT_NR_CPUS,
+		.mode		= 0644,
+		.proc_handler	= sched_busy_hyst_handler,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= &ns_per_sec,
+	},
+	{
+		.procname	= "sched_util_busy_hyst_cpu_util",
+		.data		= &sysctl_sched_util_busy_hyst_cpu_util,
+		.maxlen		= sizeof(unsigned int) * WALT_NR_CPUS,
+		.mode		= 0644,
+		.proc_handler	= sched_busy_hyst_handler,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= &one_thousand,
+	},
 	{
 		.procname	= "sched_ravg_window_nr_ticks",
 		.data		= &sysctl_sched_ravg_window_nr_ticks,
@@ -781,10 +811,14 @@ void walt_tunables(void)
 	for (i = 0; i < WALT_NR_CPUS; i++) {
 		sysctl_sched_coloc_busy_hyst_cpu[i] = 39000000;
 		sysctl_sched_coloc_busy_hyst_cpu_busy_pct[i] = 10;
+		sysctl_sched_util_busy_hyst_cpu[i] = 5000000;
+		sysctl_sched_util_busy_hyst_cpu_util[i] = 15;
 	}
 
 	sysctl_sched_coloc_busy_hyst_enable_cpus = 112;
 
+	sysctl_sched_util_busy_hyst_enable_cpus = 255;
+
 	sysctl_sched_coloc_busy_hyst_max_ms = 5000;
 
 	sched_ravg_window = DEFAULT_SCHED_RAVG_WINDOW;
diff --git a/kernel/sched/walt/walt.h b/kernel/sched/walt/walt.h
index 61585a487379..b0dc1690ae15 100644
--- a/kernel/sched/walt/walt.h
+++ b/kernel/sched/walt/walt.h
@@ -210,6 +210,9 @@ extern unsigned int sysctl_sched_coloc_busy_hyst_enable_cpus;
 extern unsigned int sysctl_sched_coloc_busy_hyst_cpu[WALT_NR_CPUS];
 extern unsigned int sysctl_sched_coloc_busy_hyst_max_ms;
 extern unsigned int sysctl_sched_coloc_busy_hyst_cpu_busy_pct[WALT_NR_CPUS];
+extern unsigned int sysctl_sched_util_busy_hyst_enable_cpus;
+extern unsigned int sysctl_sched_util_busy_hyst_cpu[WALT_NR_CPUS];
+extern unsigned int sysctl_sched_util_busy_hyst_cpu_util[WALT_NR_CPUS];
 extern unsigned int sysctl_sched_boost; /* To/from userspace */
 extern unsigned int sysctl_sched_capacity_margin_up[MAX_MARGIN_LEVELS];
 extern unsigned int sysctl_sched_capacity_margin_down[MAX_MARGIN_LEVELS];