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h=From:To:Cc:Subject:Date; b=cI9f8YtRJ+edLFJlYPyXxAzXRe8E6sxjDX+IW3YEp6gzU+FkO2TCYOxaY0tKab9xg AzpLZOrtpkGQFuEWklX59RZgAvTPv5ASwtwNPR6bbSD7hAyiY+WAMdQrYX3CKSeNWY Fl59i58l4G5p34IRrpvClc92blo8kMO5diA3fhI9tNcJsOePfVGDcF7zWLsqT671LD Qblp6NslfepNv31/aNO8rcqqJDtnpg7qQNvK7bfa/ir0yMfCe/hVcc8o34wD/1ziDb lL9HOS9ETJNmkg1yY2QqKYX/yBBIF+22icv8IAOuvnnd330Bn29qQXgwZ/wGl73zBc n7dloPmQHgGhg== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 0/5] mm/damon/vaddr: support {prep,apply}_probes Date: Sat, 5 Sep 2026 13:26:22 -0700 Message-ID: <20260905202634.88102-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: m5e4jr7majn4ihzw6oqumrsa9o3dqmsa X-Rspamd-Queue-Id: 6350040003 X-Rspamd-Server: rspam06 X-HE-Tag: 1788640005-313826 X-HE-Meta: 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 RhYIbBBr yMSicBSEOQXwYZAyjvagAKDZCp1xpMui/R6xdt7AZijQEpueg+bj5sygmxfP+TeZgOj51Xs5hjzMUVqzp8NTILcfxX/aF5XQqIXmRZlHEyLAOkFMTX03SOiYpOns9cVDOGD7wmQ5l5sPll0noI9Cd1O7OGZ3Dd3Kk4uZoQFXiixRDknWvzXH+hsUG4ymZyxaHy99rrTQo1pnoVzhUm9FC73i996uKLxn9qk23oxG+IewabEhopZ8kv5TIFrfFTC4icWrROG18L0fn8EHaiO4Gt0Ohig== 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 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: 59446eebc45959fe2d899aeeb301c8df6a1eaf04 -- 2.47.3