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Message-ID: <167361307447.4906.15636884129061462694.tip-bot2@tip-bot2>
Date: Fri, 13 Jan 2023 12:31:14 -0000
From: "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Peter Zijlstra (Intel)" <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>,
Tony Lindgren <tony@...mide.com>,
Ulf Hansson <ulf.hansson@...aro.org>,
Frederic Weisbecker <frederic@...nel.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: sched/core] cpuidle, OMAP3: Push RCU-idle into driver
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 4d1be9e745382b41492b0cb9000829863db7133a
Gitweb: https://git.kernel.org/tip/4d1be9e745382b41492b0cb9000829863db7133a
Author: Peter Zijlstra <peterz@...radead.org>
AuthorDate: Thu, 12 Jan 2023 20:43:23 +01:00
Committer: Ingo Molnar <mingo@...nel.org>
CommitterDate: Fri, 13 Jan 2023 11:47:19 +01:00
cpuidle, OMAP3: Push RCU-idle into driver
Doing RCU-idle outside the driver, only to then teporarily enable it
again before going idle is suboptimal.
Notably the cpu_pm_*() calls implicitly re-enable RCU for a bit.
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Tested-by: Tony Lindgren <tony@...mide.com>
Tested-by: Ulf Hansson <ulf.hansson@...aro.org>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
Reviewed-by: Tony Lindgren <tony@...mide.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Link: https://lore.kernel.org/r/20230112195539.883561913@infradead.org
---
arch/arm/mach-omap2/cpuidle34xx.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 090a8aa..cedf5cb 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -133,7 +133,9 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
}
/* Execute ARM wfi */
+ ct_idle_enter();
omap_sram_idle();
+ ct_idle_exit();
/*
* Call idle CPU PM enter notifier chain to restore
@@ -265,6 +267,7 @@ static struct cpuidle_driver omap3_idle_driver = {
.owner = THIS_MODULE,
.states = {
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 2 + 2,
.target_residency = 5,
@@ -272,6 +275,7 @@ static struct cpuidle_driver omap3_idle_driver = {
.desc = "MPU ON + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 10 + 10,
.target_residency = 30,
@@ -279,6 +283,7 @@ static struct cpuidle_driver omap3_idle_driver = {
.desc = "MPU ON + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 50 + 50,
.target_residency = 300,
@@ -286,6 +291,7 @@ static struct cpuidle_driver omap3_idle_driver = {
.desc = "MPU RET + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 1500 + 1800,
.target_residency = 4000,
@@ -293,6 +299,7 @@ static struct cpuidle_driver omap3_idle_driver = {
.desc = "MPU OFF + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 2500 + 7500,
.target_residency = 12000,
@@ -300,6 +307,7 @@ static struct cpuidle_driver omap3_idle_driver = {
.desc = "MPU RET + CORE RET",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 3000 + 8500,
.target_residency = 15000,
@@ -307,6 +315,7 @@ static struct cpuidle_driver omap3_idle_driver = {
.desc = "MPU OFF + CORE RET",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 10000 + 30000,
.target_residency = 30000,
@@ -328,6 +337,7 @@ static struct cpuidle_driver omap3430_idle_driver = {
.owner = THIS_MODULE,
.states = {
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 110 + 162,
.target_residency = 5,
@@ -335,6 +345,7 @@ static struct cpuidle_driver omap3430_idle_driver = {
.desc = "MPU ON + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 106 + 180,
.target_residency = 309,
@@ -342,6 +353,7 @@ static struct cpuidle_driver omap3430_idle_driver = {
.desc = "MPU ON + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 107 + 410,
.target_residency = 46057,
@@ -349,6 +361,7 @@ static struct cpuidle_driver omap3430_idle_driver = {
.desc = "MPU RET + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 121 + 3374,
.target_residency = 46057,
@@ -356,6 +369,7 @@ static struct cpuidle_driver omap3430_idle_driver = {
.desc = "MPU OFF + CORE ON",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 855 + 1146,
.target_residency = 46057,
@@ -363,6 +377,7 @@ static struct cpuidle_driver omap3430_idle_driver = {
.desc = "MPU RET + CORE RET",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 7580 + 4134,
.target_residency = 484329,
@@ -370,6 +385,7 @@ static struct cpuidle_driver omap3430_idle_driver = {
.desc = "MPU OFF + CORE RET",
},
{
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
.enter = omap3_enter_idle_bm,
.exit_latency = 7505 + 15274,
.target_residency = 484329,
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