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{ "id": 26183, "url": "https://patchwork.libcamera.org/api/patches/26183/?format=api", "web_url": "https://patchwork.libcamera.org/patch/26183/", "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": "<20260216203034.27558-15-mzamazal@redhat.com>", "date": "2026-02-16T20:30:33", "name": "[RFC,v2,14/14] libcamera: software_isp: Remove stats-sharing TODO item", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "af63376bf3fa2ffad39818605ae920749182b3ba", "submitter": { "id": 177, "url": "https://patchwork.libcamera.org/api/people/177/?format=api", "name": "Milan Zamazal", "email": "mzamazal@redhat.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/26183/mbox/", "series": [ { "id": 5795, "url": "https://patchwork.libcamera.org/api/series/5795/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5795", "date": "2026-02-16T20:30:19", "name": "Software ISP: Share params and stats buffers", "version": 2, "mbox": "https://patchwork.libcamera.org/series/5795/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/26183/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/26183/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "X-Original-To": "parsemail@patchwork.libcamera.org", "Delivered-To": "parsemail@patchwork.libcamera.org", "Received": [ "from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 9CAFDC0DA4\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 16 Feb 2026 20:31:12 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 5CF6A6222A;\n\tMon, 16 Feb 2026 21:31:12 +0100 (CET)", "from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 1216062084\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 16 Feb 2026 21:31:08 +0100 (CET)", "from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com\n\t(ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97])\n\tby relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n\tcipher=TLS_AES_256_GCM_SHA384) id us-mta-161-siGspf4NNgCZtXL120t78w-1;\n\tMon, 16 Feb 2026 15:31:06 -0500", "from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com\n\t(mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com\n\t[10.30.177.93])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\tkey-exchange X25519 server-signature RSA-PSS (2048 bits)\n\tserver-digest SHA256) (No client certificate requested)\n\tby mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix)\n\twith ESMTPS\n\tid D99381800451 for <libcamera-devel@lists.libcamera.org>;\n\tMon, 16 Feb 2026 20:31:05 +0000 (UTC)", "from mzamazal-thinkpadp1gen7.tpbc.com (unknown [10.44.32.25])\n\tby mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix)\n\twith ESMTP id B47051800464; Mon, 16 Feb 2026 20:31:04 +0000 (UTC)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=redhat.com header.i=@redhat.com\n\theader.b=\"Jt6bkcpM\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n\ts=mimecast20190719; t=1771273868;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\tto:to:cc:cc:mime-version:mime-version:content-type:content-type:\n\tcontent-transfer-encoding:content-transfer-encoding:\n\tin-reply-to:in-reply-to:references:references;\n\tbh=4Of8XG1Fc76HUveb3P8ENgdIRuS25Mfk2sApS377kEo=;\n\tb=Jt6bkcpMMOLP4WMJHsl6grVhvy70duiDkLXwI1bNogZ24nRc/8KyZjssocNWtDnsp4NaXk\n\tNC6N8HSJSz1/xF8u7Usc/4v/sHxDPVkWLF3EakJdFVoMUeHeiIi68U52PRGE710QZT3UTF\n\tV78r8+RuVG9QOzOft7FvW+tVjeKIVJc=", "X-MC-Unique": "siGspf4NNgCZtXL120t78w-1", "X-Mimecast-MFC-AGG-ID": "siGspf4NNgCZtXL120t78w_1771273866", "From": "Milan Zamazal <mzamazal@redhat.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Milan Zamazal <mzamazal@redhat.com>", "Subject": "[RFC PATCH v2 14/14] libcamera: software_isp: Remove stats-sharing\n\tTODO item", "Date": "Mon, 16 Feb 2026 21:30:33 +0100", "Message-ID": "<20260216203034.27558-15-mzamazal@redhat.com>", "In-Reply-To": "<20260216203034.27558-1-mzamazal@redhat.com>", "References": "<20260216203034.27558-1-mzamazal@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.93", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "90kfrPurvqmLwBqh7s0Xs8zRIiDBkVtLgT0U3ZxaedE_1771273866", "X-Mimecast-Originator": "redhat.com", "Content-Transfer-Encoding": "8bit", "content-type": "text/plain; charset=\"US-ASCII\"; x-default=true", "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>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Shared per-frame statistics buffers are implemented, we can remove\nTODO #2.\n\nSigned-off-by: Milan Zamazal <mzamazal@redhat.com>\n---\n src/libcamera/software_isp/TODO | 27 ---------------------------\n 1 file changed, 27 deletions(-)", "diff": "diff --git a/src/libcamera/software_isp/TODO b/src/libcamera/software_isp/TODO\nindex 1a71ab8a5..8837641e6 100644\n--- a/src/libcamera/software_isp/TODO\n+++ b/src/libcamera/software_isp/TODO\n@@ -1,30 +1,3 @@\n-2. Reconsider stats sharing\n-\n->>> +void SwStatsCpu::finishFrame(void)\n->>> +{\n->>> +\t*sharedStats_ = stats_;\n->> \n->> Is it more efficient to copy the stats instead of operating directly on\n->> the shared memory ?\n->\n-> I inherited doing things this way from Andrey. I kept this because\n-> we don't really have any synchronization with the IPA reading this.\n->\n-> So the idea is to only touch this when the next set of statistics\n-> is ready since we don't know when the IPA is done with accessing\n-> the previous set of statistics ...\n->\n-> This is both something which seems mostly a theoretic problem,\n-> yet also definitely something which I think we need to fix.\n->\n-> Maybe use a ringbuffer of stats buffers and pass the index into\n-> the ringbuffer to the emit signal ?\n-\n-That would match how we deal with hardware ISPs, and I think that's a\n-good idea. It will help decoupling the processing side from the IPA.\n-\n----\n-\n 3. Remove statsReady signal\n \n > class SwStatsCpu\n", "prefixes": [ "RFC", "v2", "14/14" ] }