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From: Gregory Price <gourry@gourry.net>
To: Bharata B Rao <bharata@amd.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Jonathan.Cameron@huawei.com, dave.hansen@intel.com,
	mgorman@techsingularity.net, mingo@redhat.com,
	peterz@infradead.org, raghavendra.kt@amd.com, riel@surriel.com,
	rientjes@google.com, sj@kernel.org, weixugc@google.com,
	willy@infradead.org, ying.huang@linux.alibaba.com,
	ziy@nvidia.com, dave@stgolabs.net, nifan.cxl@gmail.com,
	xuezhengchu@huawei.com, yiannis@zptcorp.com,
	akpm@linux-foundation.org, david@redhat.com, byungchul@sk.com,
	kinseyho@google.com, joshua.hahnjy@gmail.com, yuanchu@google.com,
	balbirs@nvidia.com, alok.rathore@samsung.com, shivankg@amd.com
Subject: Re: [RFC PATCH v5 00/10] mm: Hot page tracking and promotion infrastructure
Date: Tue, 24 Feb 2026 10:30:07 -0500	[thread overview]
Message-ID: <aZ3D_8GJit3FYhQc@gourry-fedora-PF4VCD3F> (raw)
In-Reply-To: <7a574665-0a65-46fb-b87d-d2ae28308759@amd.com>

On Tue, Feb 24, 2026 at 05:25:13PM +0530, Bharata B Rao wrote:
> >> Time in seconds - Lower is better
> >> Mop/s total - Higher is better
> >> =====================================================================================
> >>                         Base            Base            pghot-default
> >> pghot-precise
> >>                         NUMAB0          NUMAB2          NUMAB2          NUMAB2
> >> =====================================================================================
> >> Time in seconds         7349.86         4422.50         6219.71         4113.56
> >> Mop/s total             53247.66        88493.630       62923.030       95139.810
> >>
> >> pgpromote_success       0               42181834        248503390       41955718
> >> pgpromote_candidate     0               0               577086192       0
> >> pgpromote_candidate_nrl 0               42181834        29410329        41956171
> >> pgdemote_kswapd         0               0               216489010       0
> >> numa_pte_updates        0               42252749        607470975       42037882
> >> numa_hint_faults        0               42183772        606540729       41968150
> >> =====================================================================================
> 
> For pghot-default, with target_nid alternating between the available
> toptier nodes 0 and 1, the numbers catch up with pghot-precise and base
> NUMAB2 case as seen below:
> ================================
> Time in seconds         4337.98
> Mop/s total             90217.86
> 
> pgpromote_success       42170085
> pgpromote_candidate     0
> pgpromote_candidate_nrl 42171963
> pgdemote_kswapd         0
> numa_pte_updates        42338538
> numa_hint_faults        42185662
> ================================
> 

Fascinating! Thank you for the quick follow up.

I wonder if this was a lucky run, it almost seems *too* perfect.

~Gregory


      reply	other threads:[~2026-02-24 15:30 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-29 14:40 Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 01/10] mm: migrate: Allow misplaced migration without VMA Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 02/10] migrate: Add migrate_misplaced_folios_batch() Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 03/10] mm: Hot page tracking and promotion Bharata B Rao
2026-02-11 15:40   ` Bharata B Rao
2026-02-11 16:08     ` Gregory Price
2026-02-12  2:03       ` Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 04/10] mm: pghot: Precision mode for pghot Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 05/10] mm: sched: move NUMA balancing tiering promotion to pghot Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 06/10] x86: ibs: In-kernel IBS driver for memory access profiling Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 07/10] x86: ibs: Enable IBS profiling for memory accesses Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 08/10] mm: mglru: generalize page table walk Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 09/10] mm: klruscand: use mglru scanning for page promotion Bharata B Rao
2026-01-29 14:40 ` [RFC PATCH v5 10/10] mm: pghot: Add folio_mark_accessed() as hotness source Bharata B Rao
2026-02-09  3:25 ` [RFC PATCH v5 00/10] mm: Hot page tracking and promotion infrastructure Bharata B Rao
2026-02-09  3:30 ` Bharata B Rao
2026-02-11 15:30 ` Bharata B Rao
2026-02-11 16:04   ` Gregory Price
2026-02-12  2:16     ` Bharata B Rao
2026-02-11 16:06   ` Gregory Price
2026-02-12 16:15   ` Bharata B Rao
2026-02-13 14:56 ` Gregory Price
2026-02-16  3:00   ` Bharata B Rao
2026-02-23 14:27 ` Bharata B Rao
2026-02-23 15:02   ` Gregory Price
2026-02-24 11:55     ` Bharata B Rao
2026-02-24 15:30       ` Gregory Price [this message]

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