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GET /api/patches/813789/?format=api
{ "id": 813789, "url": "http://patchwork.ozlabs.org/api/patches/813789/?format=api", "web_url": "http://patchwork.ozlabs.org/project/skiboot/patch/20170914111346.11970-2-npiggin@gmail.com/", "project": { "id": 44, "url": "http://patchwork.ozlabs.org/api/projects/44/?format=api", "name": "skiboot firmware development", "link_name": "skiboot", "list_id": "skiboot.lists.ozlabs.org", "list_email": "skiboot@lists.ozlabs.org", "web_url": "http://github.com/open-power/skiboot", "scm_url": "http://github.com/open-power/skiboot", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170914111346.11970-2-npiggin@gmail.com>", "list_archive_url": null, "date": "2017-09-14T11:13:42", "name": "[1/5] cpu: avoid decrementer wakeups in case of cpu_wake_on_job idle", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "18c37c560a65c95bd20b50abee3a681deeb4d4d0", "submitter": { "id": 69518, "url": "http://patchwork.ozlabs.org/api/people/69518/?format=api", "name": "Nicholas Piggin", "email": "npiggin@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/skiboot/patch/20170914111346.11970-2-npiggin@gmail.com/mbox/", "series": [ { "id": 3075, "url": "http://patchwork.ozlabs.org/api/series/3075/?format=api", "web_url": "http://patchwork.ozlabs.org/project/skiboot/list/?series=3075", "date": "2017-09-14T11:13:41", "name": "POWER9 idle pm support", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/3075/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/813789/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/813789/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "skiboot@lists.ozlabs.org" ], "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "skiboot@lists.ozlabs.org" ], "Received": [ "from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xtGBx6VnTz9s7v\n\tfor <incoming@patchwork.ozlabs.org>;\n\tThu, 14 Sep 2017 21:14:33 +1000 (AEST)", "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xtGBx5KDWzDrVy\n\tfor <incoming@patchwork.ozlabs.org>;\n\tThu, 14 Sep 2017 21:14:33 +1000 (AEST)", "from mail-pg0-x241.google.com (mail-pg0-x241.google.com\n\t[IPv6:2607:f8b0:400e:c05::241])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xtGBW060lzDrCv\n\tfor <skiboot@lists.ozlabs.org>; Thu, 14 Sep 2017 21:14:10 +1000 (AEST)", "by mail-pg0-x241.google.com with SMTP id i130so1540818pgc.0\n\tfor <skiboot@lists.ozlabs.org>; Thu, 14 Sep 2017 04:14:10 -0700 (PDT)", "from roar.au.ibm.com (203-219-56-202.tpgi.com.au. [203.219.56.202])\n\tby smtp.gmail.com with ESMTPSA id\n\tc2sm29289224pgq.61.2017.09.14.04.14.05\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tThu, 14 Sep 2017 04:14:07 -0700 (PDT)" ], "Authentication-Results": [ "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"DYE46DOB\"; dkim-atps=neutral", "lists.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"DYE46DOB\"; dkim-atps=neutral", "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=gmail.com\n\t(client-ip=2607:f8b0:400e:c05::241; helo=mail-pg0-x241.google.com;\n\tenvelope-from=npiggin@gmail.com; receiver=<UNKNOWN>)", "lists.ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"DYE46DOB\"; dkim-atps=neutral" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=9r+7z0eCPLNW2rYs7HClrKreLmm1fSU1+kZPNkb5dG4=;\n\tb=DYE46DOBLKLHZUE4k+eqt5g1/aRmXjMFbw74tBSsd5b7aJPvH0wWlxsU4k5LmCyK7L\n\tDKa2ncG2y6gZFSK3zv/0ldJS821sJeC+MLCmlX6p8ZewI1X6WH6xR6rxKguxUsrDQw6n\n\tpvjjWVh4FlVBMamfY0ReT5HC+aEvG25r9yu0eguejcGK1PTIOEZDPxu2zRhutJcE39df\n\tqpwL5LwIUV+77amlMDX2WdfNvNoOCNH7Z9/KPjr7T6DWI9Dbk28d+VkCkcZnaehnkvul\n\tlp2ie3hqWtLUdx+yDMx3rFa+YxMh9sPiJo8QwI1uhvVPhCp5/TdmhBH6L4s2QRXcKO+Q\n\tNHqA==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=9r+7z0eCPLNW2rYs7HClrKreLmm1fSU1+kZPNkb5dG4=;\n\tb=o3NoQ3rR2Ie1chxgBE0/O41zjs5BRYXsfDCuPZLKI9BYmIlfpecQpOGSMuEcJIHjD8\n\tdSssZFiz4eGkrBncUb+dC9WfIZ11tsYXzne/Dapu4/bp4Bk6iRSqKvT5D2NeAjgBhEqV\n\tQofj55PNdtEWH0+oJTgtZNNuHNJqoWup7CEXMXowFnowG9jbUvjI/8157J0eA35+Vh/a\n\tyY6U8nFaMfv6ezmthn3Kbnvaxwq9oRQwShCCaFB8YqywUb7O0lozFdpMgesJ14bWGEKe\n\tVU4PYU4Qe7R9VUqX3STokK/y/V9asXodF1Z025GLuqZI+mszG989yxrYRrL+y1qYA5/I\n\t8o1w==", "X-Gm-Message-State": "AHPjjUhOQD7UwK4Fq1vkY2zSBIWP2j1rMG+bdzlX1ouONk57hhSvu3+u\n\tkheCJCR5+C634csH", "X-Google-Smtp-Source": "ADKCNb7UWSe80KHB3B/6Z+iZN0Tr8tJJ9emp0Ltnc93bQQAb6NOghx/hVOwrQhs+IzAfb0gujskRVA==", "X-Received": "by 10.84.217.138 with SMTP id p10mr23785074pli.400.1505387648757;\n\tThu, 14 Sep 2017 04:14:08 -0700 (PDT)", "From": "Nicholas Piggin <npiggin@gmail.com>", "To": "skiboot@lists.ozlabs.org", "Date": "Thu, 14 Sep 2017 21:13:42 +1000", "Message-Id": "<20170914111346.11970-2-npiggin@gmail.com>", "X-Mailer": "git-send-email 2.13.3", "In-Reply-To": "<20170914111346.11970-1-npiggin@gmail.com>", "References": "<20170914111346.11970-1-npiggin@gmail.com>", "Subject": "[Skiboot] [PATCH 1/5] cpu: avoid decrementer wakeups in case of\n\tcpu_wake_on_job idle", "X-BeenThere": "skiboot@lists.ozlabs.org", "X-Mailman-Version": "2.1.24", "Precedence": "list", "List-Id": "Mailing list for skiboot development <skiboot.lists.ozlabs.org>", "List-Unsubscribe": "<https://lists.ozlabs.org/options/skiboot>,\n\t<mailto:skiboot-request@lists.ozlabs.org?subject=unsubscribe>", "List-Archive": "<http://lists.ozlabs.org/pipermail/skiboot/>", "List-Post": "<mailto:skiboot@lists.ozlabs.org>", "List-Help": "<mailto:skiboot-request@lists.ozlabs.org?subject=help>", "List-Subscribe": "<https://lists.ozlabs.org/listinfo/skiboot>,\n\t<mailto:skiboot-request@lists.ozlabs.org?subject=subscribe>", "Cc": "\"Gautham R . Shenoy\" <ego@linux.vnet.ibm.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org", "Sender": "\"Skiboot\"\n\t<skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org>" }, "content": "Rather than setting decrementer to max in the case we want to\nignore it, just don't set it as a wakeup reason the in LPCR.\n\nSigned-off-by: Nicholas Piggin <npiggin@gmail.com>\n---\n core/cpu.c | 15 +++++++--------\n 1 file changed, 7 insertions(+), 8 deletions(-)", "diff": "diff --git a/core/cpu.c b/core/cpu.c\nindex bcf84ad5..0bdf8299 100644\n--- a/core/cpu.c\n+++ b/core/cpu.c\n@@ -304,17 +304,9 @@ static void cpu_idle_p8(enum cpu_wake_cause wake_on)\n \t\treturn;\n \t}\n \n-\t/* If we are waking on job, whack DEC to highest value */\n-\tif (wake_on == cpu_wake_on_job)\n-\t\tmtspr(SPR_DEC, 0x7fffffff);\n-\n \t/* Clean up ICP, be ready for IPIs */\n \ticp_prep_for_pm();\n \n-\t/* Setup wakup cause in LPCR */\n-\tlpcr |= SPR_LPCR_P8_PECE2 | SPR_LPCR_P8_PECE3;\n-\tmtspr(SPR_LPCR, lpcr);\n-\n \t/* Synchronize with wakers */\n \tif (wake_on == cpu_wake_on_job) {\n \t\t/* Mark ourselves in idle so other CPUs know to send an IPI */\n@@ -324,6 +316,10 @@ static void cpu_idle_p8(enum cpu_wake_cause wake_on)\n \t\t/* Check for jobs again */\n \t\tif (cpu_check_jobs(cpu) || !pm_enabled)\n \t\t\tgoto skip_sleep;\n+\n+\t\tlpcr |= SPR_LPCR_P8_PECE2;\n+\t\tmtspr(SPR_LPCR, lpcr);\n+\n \t} else {\n \t\t/* Mark outselves sleeping so cpu_set_pm_enable knows to\n \t\t * send an IPI\n@@ -334,6 +330,9 @@ static void cpu_idle_p8(enum cpu_wake_cause wake_on)\n \t\t/* Check if PM got disabled */\n \t\tif (!pm_enabled)\n \t\t\tgoto skip_sleep;\n+\n+\t\tlpcr |= SPR_LPCR_P8_PECE2 | SPR_LPCR_P8_PECE3;\n+\t\tmtspr(SPR_LPCR, lpcr);\n \t}\n \n \t/* Enter nap */\n", "prefixes": [ "1/5" ] }