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{ "id": 2874, "url": "https://patchwork.libcamera.org/api/covers/2874/?format=api", "web_url": "https://patchwork.libcamera.org/cover/2874/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20200224193601.1040770-1-niklas.soderlund@ragnatech.se>", "date": "2020-02-24T19:35:57", "name": "[libcamera-devel,v2,0/4] libcamera: V4L2BufferCache: Improve cache eviction strategy", "submitter": { "id": 5, "url": "https://patchwork.libcamera.org/api/people/5/?format=api", "name": "Niklas Söderlund", "email": "niklas.soderlund@ragnatech.se" }, "mbox": "https://patchwork.libcamera.org/cover/2874/mbox/", "series": [ { "id": 691, "url": "https://patchwork.libcamera.org/api/series/691/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=691", "date": "2020-02-24T19:35:57", "name": "libcamera: V4L2BufferCache: Improve cache eviction strategy", "version": 2, "mbox": "https://patchwork.libcamera.org/series/691/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/2874/comments/", "headers": { "Return-Path": "<niklas.soderlund@ragnatech.se>", "Received": [ "from bin-mail-out-05.binero.net (bin-mail-out-05.binero.net\n\t[195.74.38.228])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 911B96042F\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 24 Feb 2020 20:36:24 +0100 (CET)", "from bismarck.berto.se (p4fca2392.dip0.t-ipconnect.de\n\t[79.202.35.146]) by bin-vsp-out-03.atm.binero.net (Halon) with ESMTPA\n\tid e5941d26-573c-11ea-9f40-0050569116f7;\n\tMon, 24 Feb 2020 20:36:18 +0100 (CET)" ], "X-Halon-ID": "e5941d26-573c-11ea-9f40-0050569116f7", "Authorized-sender": "niklas@soderlund.pp.se", "From": "=?utf-8?q?Niklas_S=C3=B6derlund?= <niklas.soderlund@ragnatech.se>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Mon, 24 Feb 2020 20:35:57 +0100", "Message-Id": "<20200224193601.1040770-1-niklas.soderlund@ragnatech.se>", "X-Mailer": "git-send-email 2.25.0", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v2 0/4] libcamera: V4L2BufferCache:\n\tImprove cache eviction strategy", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "X-List-Received-Date": "Mon, 24 Feb 2020 19:36:24 -0000" }, "content": "Hello,\n\nThis small series improves the function of the V4L2BufferCache and how\nit selects which cache entries to evict. This solves a real issue where \nif the cache is not pre-allocated the cache can perform suboptimally and \nnot utilise all the entries in the cache.\n\nPatch 1/4 fix an error in the test class BufferSource found as code in \nv1 of this series was based on it. 2/4 Extracts the BufferSource from \nthe camera buffer import test so it can be used in 3/4 where the test \nfor the V4L2BufferCache is added. Patch 3/4 also add tests which breaks \nwithout the improved cache eviction strategy introduced in 4/4.\n\nNiklas Söderlund (4):\n test: camera: buffer_import: Fix error messages\n test: Extract BufferSource class out of camera tests to libtest\n test: v4l2_videodevice: Add test for V4L2BufferCache\n libcamera: V4L2BufferCache: Improve cache eviction strategy\n\n src/libcamera/include/v4l2_videodevice.h | 1 +\n src/libcamera/v4l2_videodevice.cpp | 9 +-\n test/camera/buffer_import.cpp | 92 +---------\n test/libtest/buffer_source.cpp | 98 +++++++++++\n test/libtest/buffer_source.h | 32 ++++\n test/libtest/meson.build | 11 +-\n test/v4l2_videodevice/buffer_cache.cpp | 215 +++++++++++++++++++++++\n test/v4l2_videodevice/meson.build | 1 +\n 8 files changed, 361 insertions(+), 98 deletions(-)\n create mode 100644 test/libtest/buffer_source.cpp\n create mode 100644 test/libtest/buffer_source.h\n create mode 100644 test/v4l2_videodevice/buffer_cache.cpp" }