From: Duan Tingyin <tingyin.duan@gmail.com>
To: yu.c.chen@intel.com
Cc: aubrey.li@intel.com, bsegall@google.com, cyy@cyyself.name,
dietmar.eggemann@arm.com, gautham.shenoy@amd.com,
hdanton@sina.com, jianyong.wu@outlook.com, juri.lelli@redhat.com,
kprateek.nayak@amd.com, len.brown@intel.com,
libo.chen@oracle.com, linux-kernel@vger.kernel.org,
mgorman@suse.de, mingo@redhat.com, peterz@infradead.org,
rostedt@goodmis.org, sshegde@linux.ibm.com,
tim.c.chen@linux.intel.com, tingyin.duan@gmail.com,
vernhao@tencent.com, vincent.guittot@linaro.org,
vineethr@linux.ibm.com, vschneid@redhat.com,
yu.chen.surf@gmail.com, zhao1.liu@intel.com
Subject: Re: [RFC PATCH v4 25/28] sched: Skip cache aware scheduling if the process has many active threads
Date: Tue, 2 Sep 2025 15:56:01 +0800 [thread overview]
Message-ID: <20250902075601.4601-1-tingyin.duan@gmail.com> (raw)
In-Reply-To: <d6a19a7d-e435-4a27-9725-b2fb802a52fd@intel.com>
After applying this patch, the performance regression has been significantly improved. Thank you!
next prev parent reply other threads:[~2025-09-02 7:56 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-09 4:57 [RFC PATCH v4 00/28] Cache aware load-balancing Chen Yu
2025-08-09 5:00 ` [RFC PATCH v4 01/28] sched: " Chen Yu
2025-08-12 1:30 ` kernel test robot
2025-08-12 3:26 ` Chen, Yu C
2025-08-09 5:01 ` [RFC PATCH v4 02/28] sched: Several fixes for cache aware scheduling Chen Yu
2025-08-09 5:01 ` [RFC PATCH v4 03/28] sched: Avoid task migration within its preferred LLC Chen Yu
2025-08-09 5:02 ` [RFC PATCH v4 04/28] sched: Avoid calculating the cpumask if the system is overloaded Chen Yu
2025-08-09 5:02 ` [RFC PATCH v4 05/28] sched: Add hysteresis to switch a task's preferred LLC Chen Yu
2025-08-09 5:02 ` [RFC PATCH v4 06/28] sched: Save the per LLC utilization for better cache aware scheduling Chen Yu
2025-08-09 5:03 ` [RFC PATCH v4 07/28] sched: Add helper function to decide whether to allow " Chen Yu
2025-08-09 5:03 ` [RFC PATCH v4 08/28] sched: Set up LLC indexing Chen Yu
2025-08-09 5:03 ` [RFC PATCH v4 09/28] sched: Introduce task preferred LLC field Chen Yu
2025-08-09 5:04 ` [RFC PATCH v4 10/28] sched: Calculate the number of tasks that have LLC preference on a runqueue Chen Yu
2025-08-09 5:04 ` [RFC PATCH v4 11/28] sched: Introduce per runqueue task LLC preference counter Chen Yu
2025-08-09 5:04 ` [RFC PATCH v4 12/28] sched: Calculate the total number of preferred LLC tasks during load balance Chen Yu
2025-08-09 5:05 ` [RFC PATCH v4 13/28] sched: Tag the sched group as llc_balance if it has tasks prefer other LLC Chen Yu
2025-08-09 5:05 ` [RFC PATCH v4 14/28] sched: Introduce update_llc_busiest() to deal with groups having preferred LLC tasks Chen Yu
2025-08-09 5:06 ` [RFC PATCH v4 15/28] sched: Introduce a new migration_type to track the preferred LLC load balance Chen Yu
2025-08-09 5:06 ` [RFC PATCH v4 16/28] sched: Consider LLC locality for active balance Chen Yu
2025-08-09 5:06 ` [RFC PATCH v4 17/28] sched: Consider LLC preference when picking tasks from busiest queue Chen Yu
2025-08-09 5:07 ` [RFC PATCH v4 18/28] sched: Do not migrate task if it is moving out of its preferred LLC Chen Yu
2025-08-09 5:07 ` [RFC PATCH v4 19/28] sched: Introduce SCHED_CACHE_LB to control cache aware load balance Chen Yu
2025-08-09 5:07 ` [RFC PATCH v4 20/28] sched: Introduce SCHED_CACHE_WAKE to control LLC aggregation on wake up Chen Yu
2025-08-09 5:07 ` [RFC PATCH v4 21/28] sched: Introduce a static key to enable cache aware only for multi LLCs Chen Yu
2025-08-09 5:07 ` [RFC PATCH v4 22/28] sched: Turn EPOCH_PERIOD and EPOCH_OLD into tunnable debugfs Chen Yu
2025-08-09 5:08 ` [RFC PATCH v4 23/28] sched: Scan a task's preferred node for preferred LLC Chen Yu
2025-08-12 1:59 ` kernel test robot
2025-08-12 3:36 ` Chen, Yu C
2025-08-09 5:08 ` [RFC PATCH v4 24/28] sched: Record average number of runninhg tasks per process Chen Yu
2025-08-09 5:08 ` [RFC PATCH v4 25/28] sched: Skip cache aware scheduling if the process has many active threads Chen Yu
2025-09-02 3:52 ` Tingyin Duan
2025-09-02 5:16 ` Tingyin Duan
2025-09-02 6:14 ` Chen, Yu C
2025-09-02 7:56 ` Duan Tingyin [this message]
2025-08-09 5:08 ` [RFC PATCH v4 26/28] sched: Do not enable cache aware scheduling for process with large RSS Chen Yu
2025-08-09 5:09 ` [RFC PATCH v4 27/28] sched: Allow the user space to tune the scale factor for RSS comparison Chen Yu
2025-08-09 5:09 ` [RFC PATCH v4 28/28] sched: Add ftrace to track cache aware load balance and hottest CPU changes Chen Yu
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