From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C12C92F8E9E; Sat, 5 Sep 2026 20:26:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788640005; cv=none; b=jxrhWrUQZ19YBfEkEGGgNBr65FSCOi2vJuGH0DLuy2RxBYBKGYeD8VvNsHeyqwaD3qujuVF+Vnm6Kh4ymd+CR9YbErujrK3Lou85j1h8HJPRX5ekv5WbvhtiACbLi0cNprJOkeqXmzhZklHjY963L3Z7SdCJEAIRAa7ET+5+gwk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788640005; c=relaxed/simple; bh=siS781YOL86d2A1OduE3YacXgWvCtixOx+Z3G3HlIik=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=jBG2l8T7Wk0ttBQ1+AbMlKdiZzTgZktYva1ecF/x64ncJFuL/cvRr1s540NTkUj/dSC40FiyLstyJgGGcYtmczzyczlsjc2Ighssu0eg6NXIdC2milWa1LgN4/1KGRuIYnkLw03rbanl5QakMRIOTeETTcCo5Y55Fzuqi0Rqpac= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cI9f8YtR; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cI9f8YtR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4ACB31F00A3A; Sat, 5 Sep 2026 20:26:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788640003; bh=M3fBlIwPeb0MLRMMvDOp8XO46lHImBBRdMKs8udzsHQ=; 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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