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From: KobaK <kobak@nvidia.com>
To: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	K Prateek Nayak <kprateek.nayak@amd.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Chen Yu <yu.c.chen@intel.com>,
	Ricardo Neri <ricardo.neri@intel.com>,
	Len Brown <len.brown@intel.com>, Aubrey Li <aubrey.li@intel.com>,
	linux-kernel@vger.kernel.org,
	Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Subject: Re: [PATCH] sched/fair: avoid creating misfits during cache-aware balancing
Date: Mon, 14 Sep 2026 10:59:49 +0800	[thread overview]
Message-ID: <20260914025949.1348528-1-kobak@nvidia.com> (raw)
In-Reply-To: <20260825174112.2580942-1-tim.c.chen@linux.intel.com>

Hi Tim,

Thanks for the cache-aware load-balancing misfit patch. The tradeoff
you describe (LLC locality vs capacity loss) is clear.

I have been trying to understand how this showed up in testing. The
cover explains the failure mode, but I did not find a note on the
observation method.

Would you mind sharing how you tested and observed it? In particular:
which hybrid generation, what workload, and whether you used
schedstat lb_imbalance_misfit or another signal.

Thanks,
Koba

  parent reply	other threads:[~2026-09-14  2:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-25 17:41 Tim Chen
2026-08-26 15:57 ` Tim Chen
2026-08-31  8:41 ` Peter Zijlstra
2026-08-31 17:17   ` Tim Chen
2026-08-31 17:40   ` Tim Chen
2026-09-02  7:21     ` [tip: sched/urgent] sched/fair: Avoid " tip-bot2 for Tim Chen
2026-09-14  2:59 ` KobaK [this message]
2026-09-14 19:51   ` [PATCH] sched/fair: avoid " Tim Chen

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