linux-kernel - [PATCH v4 12/12] x86/sched: Add the SD_ASYM_PACKING flag to the die domain of hybrid processors

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Message-Id: <20230406203148.19182-13-ricardo.neri-calderon@linux.intel.com>
Date:   Thu,  6 Apr 2023 13:31:48 -0700
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>
Cc:     Ricardo Neri <ricardo.neri@...el.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Ben Segall <bsegall@...gle.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Len Brown <len.brown@...el.com>, Mel Gorman <mgorman@...e.de>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Ionela Voinescu <ionela.voinescu@....com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Chen Yu <yu.c.chen@...el.com>,
        "Tim C . Chen" <tim.c.chen@...el.com>
Subject: [PATCH v4 12/12] x86/sched: Add the SD_ASYM_PACKING flag to the die domain of hybrid processors

From: Chen Yu <yu.c.chen@...el.com>

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.

Cc: Ben Segall <bsegall@...gle.com>
Cc: Daniel Bristot de Oliveira <bristot@...hat.com>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Ionela Voinescu <ionela.voinescu@....com>
Cc: Len Brown <len.brown@...el.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Tim C. Chen <tim.c.chen@...el.com>
Cc: Valentin Schneider <vschneid@...hat.com>
Cc: x86@...nel.org
Cc: linux-kernel@...r.kernel.org
Suggested-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Signed-off-by: Chen Yu <yu.c.chen@...el.com>
---
Changes since v3:
 * Introduced this patch.

Changes since v2:
 * N/A

Changes since v1:
 * N/A
---
 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 cf7f42189e86..8d966f618413 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, },
 };
 
-- 
2.25.1