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GET /api/patches/567103/?format=api
{ "id": 567103, "url": "http://patchwork.ozlabs.org/api/patches/567103/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/1452687149-11281-4-git-send-email-christopher.s.hall@intel.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1452687149-11281-4-git-send-email-christopher.s.hall@intel.com>", "list_archive_url": null, "date": "2016-01-13T12:12:23", "name": "[v6,3/9] Add correlated clocksource relating aliased auxiliary and system clocks", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "782869834384f873e01b2a569deaec4c75ac8ccb", "submitter": { "id": 66720, "url": "http://patchwork.ozlabs.org/api/people/66720/?format=api", "name": "Hall, Christopher S", "email": "christopher.s.hall@intel.com" }, "delegate": { "id": 68, "url": "http://patchwork.ozlabs.org/api/users/68/?format=api", "username": "jtkirshe", "first_name": "Jeff", "last_name": "Kirsher", "email": "jeffrey.t.kirsher@intel.com" }, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/1452687149-11281-4-git-send-email-christopher.s.hall@intel.com/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/patches/567103/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/567103/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@lists.osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Received": [ "from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133])\n\tby ozlabs.org (Postfix) with ESMTP id 96075140297\n\tfor <incoming@patchwork.ozlabs.org>;\n\tThu, 14 Jan 2016 06:18:41 +1100 (AEDT)", "from localhost (localhost [127.0.0.1])\n\tby hemlock.osuosl.org (Postfix) with ESMTP id E398D949D0;\n\tWed, 13 Jan 2016 19:18:40 +0000 (UTC)", "from hemlock.osuosl.org ([127.0.0.1])\n\tby localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)\n\twith ESMTP id CS5rpsMjtCkX; Wed, 13 Jan 2016 19:18:39 +0000 (UTC)", "from ash.osuosl.org (ash.osuosl.org [140.211.166.34])\n\tby hemlock.osuosl.org (Postfix) with ESMTP id 6D22294867;\n\tWed, 13 Jan 2016 19:18:39 +0000 (UTC)", "from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138])\n\tby ash.osuosl.org (Postfix) with ESMTP id 7C44B1CF1FE\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tWed, 13 Jan 2016 19:18:37 +0000 (UTC)", "from localhost (localhost [127.0.0.1])\n\tby whitealder.osuosl.org (Postfix) with ESMTP id AA9708C942\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tWed, 13 Jan 2016 19:18:36 +0000 (UTC)", "from whitealder.osuosl.org ([127.0.0.1])\n\tby localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)\n\twith ESMTP id cnljIlmaR3Ef for <intel-wired-lan@lists.osuosl.org>;\n\tWed, 13 Jan 2016 19:18:36 +0000 (UTC)", "from mga11.intel.com (mga11.intel.com [192.55.52.93])\n\tby whitealder.osuosl.org (Postfix) with ESMTP id 450BC8C949\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tWed, 13 Jan 2016 19:18:36 +0000 (UTC)", "from fmsmga003.fm.intel.com ([10.253.24.29])\n\tby fmsmga102.fm.intel.com with ESMTP; 13 Jan 2016 11:18:37 -0800", "from foofoo.jf.intel.com (HELO localhost.localdomain)\n\t([134.134.172.151])\n\tby FMSMGA003.fm.intel.com with ESMTP; 13 Jan 2016 11:18:36 -0800" ], "X-Virus-Scanned": [ "amavisd-new at osuosl.org", "amavisd-new at osuosl.org" ], "X-Greylist": "domain auto-whitelisted by SQLgrey-1.7.6", "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.22,290,1449561600\"; d=\"scan'208\";a=\"632939088\"", "From": "\"Christopher S. Hall\" <christopher.s.hall@intel.com>", "To": "tglx@linutronix.de, richardcochran@gmail.com, mingo@redhat.com,\n\tjohn.stultz@linaro.org, hpa@zytor.com, jeffrey.t.kirsher@intel.com", "Date": "Wed, 13 Jan 2016 04:12:23 -0800", "Message-Id": "<1452687149-11281-4-git-send-email-christopher.s.hall@intel.com>", "X-Mailer": "git-send-email 2.1.4", "In-Reply-To": "<1452687149-11281-1-git-send-email-christopher.s.hall@intel.com>", "References": "<1452687149-11281-1-git-send-email-christopher.s.hall@intel.com>", "Cc": "\"Christopher S. Hall\" <christopher.s.hall@intel.com>,\n\tkevin.b.stanton@intel.com, netdev@vger.kernel.org, x86@kernel.org,\n\tlinux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org", "Subject": "[Intel-wired-lan] [PATCH v6 3/9] Add correlated clocksource\n\trelating aliased auxiliary and system clocks", "X-BeenThere": "intel-wired-lan@lists.osuosl.org", "X-Mailman-Version": "2.1.18-1", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n\t<intel-wired-lan.lists.osuosl.org>", "List-Unsubscribe": "<http://lists.osuosl.org/mailman/options/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@lists.osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@lists.osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@lists.osuosl.org?subject=help>", "List-Subscribe": "<http://lists.osuosl.org/mailman/listinfo/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@lists.osuosl.org?subject=subscribe>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "intel-wired-lan-bounces@lists.osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@lists.osuosl.org>" }, "content": "ACKNOWLEDGMENT: The original correlated clock source and cross\ntimestamp code was developed by Thomas Gleixner\n<tglx@linutronix.de>. It has changed considerably and any mistakes are\nmine.\n\nThe timekeeping and clocksource code don't currently comprehend two\nclocks that are aliases of one another. That is clocks that are\n*exactly* related. The correlated_cs struct encapsulated this\nrelationship between a clocksource and its alias clock. Modern Intel\nhardware provides an Always Running Timer (ART) which is exactly\nrelated to TSC through a known frequency ratio. The ART is an example\nof a correlated clocksource.\n\nSigned-off-by: Christopher S. Hall <christopher.s.hall@intel.com>\n---\n include/linux/clocksource.h | 14 ++++++++++++++\n 1 file changed, 14 insertions(+)", "diff": "diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h\nindex 4542293..726ca68 100644\n--- a/include/linux/clocksource.h\n+++ b/include/linux/clocksource.h\n@@ -267,4 +267,18 @@ struct system_counterval_t {\n \tstruct clocksource\t*cs;\n };\n \n+/*\n+ * struct correlated_cs - Descriptor for a clocksource correlated to another\n+ *\tclocksource\n+ * @related_cs:\t\tPointer to the related timekeeping clocksource\n+ * @convert:\t\tConversion function to convert a timestamp from\n+ *\t\t\tthe correlated clocksource to cycles of the related\n+ *\t\t\ttimekeeping clocksource\n+ */\n+struct correlated_cs {\n+\tstruct clocksource\t*related_cs;\n+\tcycle_t\t\t\t(*convert)(struct correlated_cs *cs,\n+\t\t\t\t\t cycle_t cycles);\n+};\n+\n #endif /* _LINUX_CLOCKSOURCE_H */\n", "prefixes": [ "v6", "3/9" ] }