From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A32FC433B4 for ; Thu, 15 Apr 2021 09:55:03 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AC23D61166 for ; Thu, 15 Apr 2021 09:55:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AC23D61166 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.110997.212131 (Exim 4.92) (envelope-from ) id 1lWyi6-00035u-Aw; Thu, 15 Apr 2021 09:54:54 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 110997.212131; Thu, 15 Apr 2021 09:54:54 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lWyi6-00035n-73; Thu, 15 Apr 2021 09:54:54 +0000 Received: by outflank-mailman (input) for mailman id 110997; Thu, 15 Apr 2021 09:54:53 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lWyi5-00035h-D2 for xen-devel@lists.xenproject.org; Thu, 15 Apr 2021 09:54:53 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id ad353301-eb3d-4cd8-8ec9-15f377c0ad37; Thu, 15 Apr 2021 09:54:52 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 00926AC6E; Thu, 15 Apr 2021 09:54:51 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: ad353301-eb3d-4cd8-8ec9-15f377c0ad37 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1618480492; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ghAjuzN7t+Osm3igbv0deLUXN/vrvvOvgrdVz/kYnLQ=; b=c5Fm/Ut/vQZ2zxCWaBPhDUbSvv2qd6VPIBYugHnVvg9jLA9YUQ9DicU+w57I6IjZS3LvR9 S+rFXfFVu4WAwFafImUO+lb1QhOf3Ua2nMl8AlCR84bYcMnkv9nsclLKSah1cvNRKd59ZQ BzjKk3BTTFt9Oe1f+u/sCR10cf9niyE= Subject: Ping: [PATCH v4 0/3] x86/time: calibration rendezvous adjustments From: Jan Beulich To: Andrew Cooper , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , Wei Liu Cc: "xen-devel@lists.xenproject.org" References: Message-ID: <4823d7ff-ad6e-979a-914a-3aa438d57a5c@suse.com> Date: Thu, 15 Apr 2021 11:54:51 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit On 01.04.2021 11:53, Jan Beulich wrote: > The first patch was, under a different title and with a different > approach, already part of the prior series of the same subject. > The other two patches are new, resulting from me spotting further > room for improvement (or so I hope). > > 1: latch to-be-written TSC value early in rendezvous loop > 2: yield to hyperthreads after updating TSC during rendezvous > 3: avoid reading the platform timer in rendezvous functions Ping? Jan