From: Peter Zijlstra <peterz@infradead.org>
To: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
"Gautham R . Shenoy" <gautham.shenoy@amd.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Chen Yu <yu.c.chen@intel.com>, Juri Lelli <juri.lelli@redhat.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
Madadi Vineeth Reddy <vineethr@linux.ibm.com>,
Hillf Danton <hdanton@sina.com>,
Shrikanth Hegde <sshegde@linux.ibm.com>,
Jianyong Wu <jianyong.wu@outlook.com>,
Yangyu Chen <cyy@cyyself.name>,
Tingyin Duan <tingyin.duan@gmail.com>,
Vern Hao <vernhao@tencent.com>, Vern Hao <haoxing990@gmail.com>,
Len Brown <len.brown@intel.com>, Aubrey Li <aubrey.li@intel.com>,
Zhao Liu <zhao1.liu@intel.com>, Chen Yu <yu.chen.surf@gmail.com>,
Adam Li <adamli@os.amperecomputing.com>,
Aaron Lu <ziqianlu@bytedance.com>,
Tim Chen <tim.c.chen@intel.com>, Josh Don <joshdon@google.com>,
Gavin Guo <gavinguo@igalia.com>,
Qais Yousef <qyousef@layalina.io>,
Libo Chen <libchen@purestorage.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 19/21] sched/cache: Add user control to adjust the aggressiveness of cache-aware scheduling
Date: Fri, 20 Feb 2026 15:29:28 +0100 [thread overview]
Message-ID: <20260220142928.GS1395266@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <ea12146a9f431b0a6f3ff30b0197c3f4a1d807f1.1770760558.git.tim.c.chen@linux.intel.com>
On Tue, Feb 10, 2026 at 02:18:59PM -0800, Tim Chen wrote:
> diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
> index bae747eddc59..dc4b7de6569f 100644
> --- a/kernel/sched/debug.c
> +++ b/kernel/sched/debug.c
> @@ -566,6 +566,16 @@ static __init int sched_init_debug(void)
> #ifdef CONFIG_SCHED_CACHE
> debugfs_create_file("llc_enabled", 0644, debugfs_sched, NULL,
> &sched_cache_enable_fops);
> + debugfs_create_u32("llc_aggr_tolerance", 0644, debugfs_sched,
> + &llc_aggr_tolerance);
> + debugfs_create_u32("llc_epoch_period", 0644, debugfs_sched,
> + &llc_epoch_period);
> + debugfs_create_u32("llc_epoch_affinity_timeout", 0644, debugfs_sched,
> + &llc_epoch_affinity_timeout);
> + debugfs_create_u32("llc_overaggr_pct", 0644, debugfs_sched,
> + &llc_overaggr_pct);
> + debugfs_create_u32("llc_imb_pct", 0644, debugfs_sched,
> + &llc_imb_pct);
> #endif
So we have debug/sched/numa_balancing/, would it make sense to stick all
of this into debug/sched/llc_balancing/ or so?
next prev parent reply other threads:[~2026-02-20 14:30 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-10 22:18 [PATCH v3 00/21] Cache Aware Scheduling Tim Chen
2026-02-10 22:18 ` [PATCH v3 01/21] sched/cache: Introduce infrastructure for cache-aware load balancing Tim Chen
2026-02-14 12:26 ` Madadi Vineeth Reddy
2026-02-14 15:34 ` Chen, Yu C
2026-02-17 18:51 ` Tim Chen
2026-02-10 22:18 ` [PATCH v3 02/21] sched/cache: Record per LLC utilization to guide cache aware scheduling decisions Tim Chen
2026-02-10 22:18 ` [PATCH v3 03/21] sched/cache: Introduce helper functions to enforce LLC migration policy Tim Chen
2026-02-14 16:12 ` Madadi Vineeth Reddy
2026-02-15 12:14 ` Chen, Yu C
2026-02-19 11:29 ` Peter Zijlstra
2026-02-19 14:48 ` Chen, Yu C
2026-02-19 14:55 ` Peter Zijlstra
2026-02-10 22:18 ` [PATCH v3 04/21] sched/cache: Make LLC id continuous Tim Chen
2026-02-14 17:53 ` Madadi Vineeth Reddy
2026-02-15 14:25 ` Chen, Yu C
2026-02-17 10:05 ` Madadi Vineeth Reddy
2026-02-17 21:20 ` Tim Chen
2026-02-16 7:44 ` K Prateek Nayak
2026-02-17 6:07 ` Chen, Yu C
2026-02-17 8:09 ` K Prateek Nayak
2026-02-17 23:12 ` Tim Chen
2026-02-18 3:28 ` K Prateek Nayak
2026-02-18 15:22 ` Chen, Yu C
2026-02-18 17:46 ` K Prateek Nayak
2026-02-18 23:21 ` Tim Chen
2026-02-19 6:12 ` K Prateek Nayak
2026-02-19 15:51 ` Peter Zijlstra
2026-02-20 0:11 ` Tim Chen
2026-02-19 11:25 ` Chen, Yu C
2026-02-19 16:10 ` K Prateek Nayak
2026-02-18 18:45 ` Tim Chen
2026-02-18 21:33 ` Tim Chen
2026-02-18 15:11 ` Chen, Yu C
2026-02-19 15:48 ` Peter Zijlstra
2026-02-20 15:22 ` Chen, Yu C
2026-02-19 15:40 ` Peter Zijlstra
2026-02-20 15:53 ` Chen, Yu C
2026-02-20 16:03 ` Peter Zijlstra
2026-02-20 16:10 ` Chen, Yu C
2026-02-20 19:24 ` Tim Chen
2026-02-20 19:30 ` Peter Zijlstra
2026-02-20 19:35 ` Tim Chen
2026-02-19 11:35 ` Peter Zijlstra
2026-02-19 18:17 ` Tim Chen
2026-02-19 14:59 ` Peter Zijlstra
2026-02-19 15:20 ` Chen, Yu C
2026-02-19 19:20 ` Tim Chen
2026-02-19 21:04 ` Tim Chen
2026-02-20 17:17 ` Chen, Yu C
2026-02-10 22:18 ` [PATCH v3 05/21] sched/cache: Assign preferred LLC ID to processes Tim Chen
2026-02-14 18:36 ` Madadi Vineeth Reddy
2026-02-16 6:58 ` Chen, Yu C
2026-02-10 22:18 ` [PATCH v3 06/21] sched/cache: Track LLC-preferred tasks per runqueue Tim Chen
2026-02-10 22:18 ` [PATCH v3 07/21] sched/cache: Introduce per CPU's tasks LLC preference counter Tim Chen
2026-02-20 10:45 ` Peter Zijlstra
2026-02-20 16:57 ` Chen, Yu C
2026-02-20 18:38 ` Peter Zijlstra
2026-02-10 22:18 ` [PATCH v3 08/21] sched/cache: Calculate the percpu sd task LLC preference Tim Chen
2026-02-20 11:02 ` Peter Zijlstra
2026-02-20 14:02 ` Peter Zijlstra
2026-02-20 17:25 ` Chen, Yu C
2026-02-10 22:18 ` [PATCH v3 09/21] sched/cache: Count tasks prefering destination LLC in a sched group Tim Chen
2026-02-20 12:52 ` Peter Zijlstra
2026-02-20 13:43 ` Peter Zijlstra
2026-02-21 2:53 ` Chen, Yu C
2026-02-10 22:18 ` [PATCH v3 10/21] sched/cache: Check local_group only once in update_sg_lb_stats() Tim Chen
2026-02-10 22:18 ` [PATCH v3 11/21] sched/cache: Prioritize tasks preferring destination LLC during balancing Tim Chen
2026-02-17 18:33 ` Madadi Vineeth Reddy
2026-02-17 21:45 ` Tim Chen
2026-02-10 22:18 ` [PATCH v3 12/21] sched/cache: Add migrate_llc_task migration type for cache-aware balancing Tim Chen
2026-02-10 22:18 ` [PATCH v3 13/21] sched/cache: Handle moving single tasks to/from their preferred LLC Tim Chen
2026-02-17 19:00 ` Madadi Vineeth Reddy
2026-02-17 22:04 ` Tim Chen
2026-02-20 13:53 ` Peter Zijlstra
2026-02-20 18:22 ` Tim Chen
2026-02-10 22:18 ` [PATCH v3 14/21] sched/cache: Respect LLC preference in task migration and detach Tim Chen
2026-02-18 9:14 ` Madadi Vineeth Reddy
2026-02-18 15:34 ` Chen, Yu C
2026-02-10 22:18 ` [PATCH v3 15/21] sched/cache: Disable cache aware scheduling for processes with high thread counts Tim Chen
2026-02-18 17:54 ` Madadi Vineeth Reddy
2026-02-18 21:44 ` Tim Chen
2026-02-19 2:28 ` Madadi Vineeth Reddy
2026-02-19 14:38 ` Chen, Yu C
2026-02-19 21:12 ` Tim Chen
2026-02-19 16:52 ` Peter Zijlstra
2026-02-20 7:02 ` Madadi Vineeth Reddy
2026-02-19 16:55 ` Peter Zijlstra
2026-02-20 6:40 ` Madadi Vineeth Reddy
2026-02-20 9:53 ` Peter Zijlstra
2026-02-24 9:42 ` Madadi Vineeth Reddy
2026-02-19 16:50 ` Peter Zijlstra
2026-02-19 21:06 ` Tim Chen
2026-02-10 22:18 ` [PATCH v3 16/21] sched/cache: Avoid cache-aware scheduling for memory-heavy processes Tim Chen
2026-02-10 22:18 ` [PATCH v3 17/21] sched/cache: Enable cache aware scheduling for multi LLCs NUMA node Tim Chen
2026-02-10 22:18 ` [PATCH v3 18/21] sched/cache: Allow the user space to turn on and off cache aware scheduling Tim Chen
2026-02-10 22:18 ` [PATCH v3 19/21] sched/cache: Add user control to adjust the aggressiveness of cache-aware scheduling Tim Chen
2026-02-20 14:29 ` Peter Zijlstra [this message]
2026-02-20 18:18 ` Tim Chen
2026-02-10 22:19 ` [PATCH v3 20/21] -- DO NOT APPLY!!! -- sched/cache/debug: Display the per LLC occupancy for each process via proc fs Tim Chen
2026-02-10 22:19 ` [PATCH v3 21/21] -- DO NOT APPLY!!! -- sched/cache/debug: Add ftrace to track the load balance statistics Tim Chen
2026-02-19 14:08 ` [PATCH v3 00/21] Cache Aware Scheduling Qais Yousef
2026-02-19 14:41 ` Peter Zijlstra
2026-02-19 15:07 ` Chen, Yu C
2026-02-19 18:11 ` Tim Chen
2026-02-20 3:29 ` Qais Yousef
2026-02-20 9:43 ` Peter Zijlstra
2026-02-24 2:49 ` Qais Yousef
2026-02-20 18:14 ` Tim Chen
2026-02-24 3:02 ` Qais Yousef
2026-02-20 3:25 ` Qais Yousef
2026-02-21 2:48 ` Chen, Yu C
2026-02-24 3:11 ` Qais Yousef
2026-02-19 19:48 ` Qais Yousef
2026-02-19 21:47 ` Tim Chen
2026-02-20 3:41 ` Qais Yousef
2026-02-20 8:45 ` Peter Zijlstra
2026-02-24 3:31 ` Qais Yousef
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