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b=O1zLryBc/iUX3iyFm4CLXnbyNTgqhfb4KtU5wDg0DzrK/Xm/xD9+MNeycr1x6I3/P 8biSDVOAOqdguqwaIFL7+7BvzRpQ7cca6uDEnzQqY9PF6cMKhaIwcWtTojKNgJ05r+ VeimpMln9miN2pKoGpZnJfE22Hg6P56fVqFLKfPhP0w6GTQVWZ4GXRNRGZqYwRQta/ wkPbTSuUi4KxSgnyCuDwyUWdsY47e/iaXVeMIDnr5nu6fXsB2njwJpet34EZbEhDP6 0n26HRNJV16+h64j1b0s5EFWUYUoJBoif6nFiMt5nUM0aWgVkZKotrmcepvRyZQouN iICsSsewoWh8g== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 0/5] mm/damon/vaddr: support {prep,apply}_probes Date: Sun, 6 Sep 2026 11:44:10 -0700 Message-ID: <20260906184417.96621-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 8609418000D X-Stat-Signature: 6siujcgkofjte4u6mnqw9wguzphzbzg8 X-Rspam-User: X-HE-Tag: 1788720265-526081 X-HE-Meta: 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 V0BGAxdz KVxwtN1ANYJc/ONe+kSGsOJ+EwWlZ7MIL/7UHgtMUmPeELpPldWonOXeg8Rxe9MYiUY6I9CntXlzpmoorSg+GuD1IItZv8lIgGp9m78MAcKqdHoCavbcOwJQE+xbacHumIRC3malUkms9qqJ8RZxaZ+6gvLmkR7/OIM3+zggjbpEL4VeMrKBFn9PRzHx7ENBe+hb4pB2/+WBn/P6qpn1YjZcl7Xb3Us5cYUSBDS0HVWP3brrUxHyr9augg35Wg7ItiAw9fX4QTsl+7AEzMwnYKLX6UWIwoj2UFUgfIaL0ExBNKxg= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: DAMON supports data attributes monitoring. However, only the physical address space operation set (paddr) is supporting it. Add the support to the virtual address space operation set (vaddr). Patch 1 adds prep_probes support to vaddr. Patch 2 moves probe filter handling code in paddr.c that can be reused by vaddr to ops-common.c. Patch 3 adds minimum apply_probes support to vaddr. Patch 4 extends the support for hugetlb. Patch 5 extends the support for pgidle_unset filter. Test ==== I confirmed it can capture ~48 mb working set of masim in vaddr mode, like below. First, start masim [1] to access ~48 mb memory at a time, in the background. $ ./masim/masim.py run \ --config_file ./masim/configs/stairs-50mb.cfg \ --repeat 10 --quiet & Note that the config says the working set is 50mb. It is 50 million bytes, so ~48 MiB. Start traditional access monitoring of masim's virtual address space using damo [2]. $ sudo ./damo/damo start $(pidof masim) Confirm it can capture the ~48 MiB working set as the 4-th region on the snapshot. $ sudo ./damo/damo report access heatmap: 11111111334[...]3000000000000000000000000000000000000000489999997777777743333333555556[...]8 # min/max temperatures: -1,150,000,000, 80,009,499, column size: 6.963 MiB intervals: sample 5 ms aggr 100 ms (max access hz 200) 0 addr 85.355 TiB size 55.703 MiB access 0 hz age 9.500 s 1 addr 85.355 TiB size 18.984 MiB access 0 hz age 6.700 s 2 addr 127.183 TiB size 278.516 MiB access 0 hz age 11.500 s 3 addr 127.183 TiB size 7.570 MiB access 0 hz age 900 ms 4 addr 127.183 TiB size 48.133 MiB access 190 hz age 800 ms 5 addr 127.183 TiB size 54.977 MiB access 0 hz age 1.700 s 6 addr 127.183 TiB size 55.113 MiB access 0 hz age 6.700 s 7 addr 127.183 TiB size 37.902 MiB access 0 hz age 3.900 s 8 addr 127.990 TiB size 120.000 KiB access 0 hz age 11.400 s 9 addr 127.990 TiB size 8.000 KiB access 70 hz age 0 ns 10 addr 127.990 TiB size 4.000 KiB access 0 hz age 11.200 s memory bw estimate: 8.931 GiB per second total size: 557.027 MiB record DAMON intervals: sample 5 ms, aggr 100 ms Stop access monitoring and start probe-only mode access monitoring. $ sudo ./damo/damo stop $ sudo ./damo/damo start $(pidof masim) --probe_prep set_pgidle \ --probe_filter allow pgidle_unset --probe_weight 1 Confirm it can also capture the ~48 MiB working set as the 11-th region on the snapshot. $ sudo ./damo/damo report attrs heatmap: 00000000113[...]40000000000000000000000000000000000000000000000001111114999999533333336[...]6 # min/max temperatures: -840,000,000, 330,002,000, column size: 6.961 MiB probe prep: set_pgidle, filter: allow pgidle_unset (weight: 1) intervals: sample 5 ms aggr 100 ms (max probe hits 20) # size address age probe_hits 0 8.000 KiB 127.990 TiB 8.700 s 0 1 120.000 KiB 127.990 TiB 8.600 s 0 2 55.543 MiB 127.183 TiB 8.400 s 0 3 110.008 MiB 127.183 TiB 8.300 s 0 4 55.352 MiB 127.183 TiB 8.100 s 0 5 55.605 MiB 127.183 TiB 8 s 0 6 55.691 MiB 85.355 TiB 7.900 s 0 7 54.430 MiB 127.183 TiB 7.900 s 0 8 50.391 MiB 127.183 TiB 6.900 s 0 9 18.879 MiB 85.355 TiB 6 s 0 10 52.844 MiB 127.183 TiB 3.500 s 0 11 48.039 MiB 127.183 TiB 3.300 s 20 12 4.000 KiB 127.990 TiB 8.500 s 20 memory bw estimate: 0 B per second total size: 556.910 MiB record DAMON intervals: sample 5 ms, aggr 100 ms [1] https://github.com/sjp38/masim [2] https://github.com/damonitor/damo Changes from RFC - RFC: https://lore.kernel.org/20260905202634.88102-1-sj@kernel.org - Drop RFC tag. - Rebase to latest mm-new. SJ Park (5): mm/damon/vaddr: support prep_probes mm/damon/paddr: move probe filter handling to ops-common mm/damon/vaddr: support apply_probe mm/damon/vaddr: extend apply_probes() for hugetlb mm/damon/vaddr: support pgidle_unset probe filter type mm/damon/ops-common.c | 32 ++++++ mm/damon/ops-common.h | 2 + mm/damon/paddr.c | 23 +---- mm/damon/vaddr.c | 232 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 267 insertions(+), 22 deletions(-) base-commit: 87f579da3b3b652d1bf5ca71ccfd7e267807e8ac -- 2.47.3