linux-kernel - [tip: sched/core] x86/sched: Add the SD_ASYM_PACKING flag to the die domain of hybrid processors

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Message-ID: <168372655018.404.15652276815766387273.tip-bot2@tip-bot2>
Date:   Wed, 10 May 2023 13:49:10 -0000
From:   "tip-bot2 for Chen Yu" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
        Chen Yu <yu.c.chen@...el.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] x86/sched: Add the SD_ASYM_PACKING flag to the die
 domain of hybrid processors

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     044f0e27dec6e30bb8875a4a12c5f2594964e93f
Gitweb:        https://git.kernel.org/tip/044f0e27dec6e30bb8875a4a12c5f2594964e93f
Author:        Chen Yu <yu.c.chen@...el.com>
AuthorDate:    Thu, 06 Apr 2023 13:31:48 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 08 May 2023 10:58:38 +02:00

x86/sched: Add the SD_ASYM_PACKING flag to the die domain of hybrid processors

Intel Meteor Lake hybrid processors have cores in two separate dies. The
cores in one of the dies have higher maximum frequency. Use the SD_ASYM_
PACKING flag to give higher priority to the die with CPUs of higher maximum
frequency.

Suggested-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Signed-off-by: Chen Yu <yu.c.chen@...el.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20230406203148.19182-13-ricardo.neri-calderon@linux.intel.com
---
 arch/x86/kernel/smpboot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a335abd..34066f6 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -583,7 +583,7 @@ static struct sched_domain_topology_level x86_hybrid_topology[] = {
 #ifdef CONFIG_SCHED_MC
 	{ cpu_coregroup_mask, x86_core_flags, SD_INIT_NAME(MC) },
 #endif
-	{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
+	{ cpu_cpu_mask, x86_sched_itmt_flags, SD_INIT_NAME(DIE) },
 	{ NULL, },
 };