From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.1 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 3DAE21F466 for ; Wed, 15 Jan 2020 11:32:28 +0000 (UTC) DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:subject:to:references:from:message-id:date :mime-version:in-reply-to:content-type :content-transfer-encoding; q=dns; s=default; b=PgsT3n7PghS03+Uo Q++yT1druz0ve6fvWl1xmv0yqYMZcZ5bbW1isOtyipKHjtdeIU0zOonN4vrTHlF5 MuS99tacfOhrftHsD14jL7LM8Q917o2m7mN98TJke0pSSNlVwpvYNFZ2DlQcZ5bT I4Di1ia43hPcR99GmQn9J6NQAEQ= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:subject:to:references:from:message-id:date :mime-version:in-reply-to:content-type :content-transfer-encoding; s=default; bh=Efx15159L9FZ5jDbPrgog7 rJ9x8=; b=yXeMdkZcyOq0bj/b52tNuJA60jVcgYyMGxVTbbmX8MK2HkMMWCbD7U X4gwNBUtszxe+LG4K/z6TfCiW7nmM8d+tebl3+mjakrQkLDBIBP1e6i8EJdkvGzJ hDMeC87ZZm2QW+gy2mtuT2Uey0dt/cdixdE5dO8xD7kO/labr0Jhg= Received: (qmail 55403 invoked by alias); 15 Jan 2020 11:32:25 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 55395 invoked by uid 89); 15 Jan 2020 11:32:25 -0000 Authentication-Results: sourceware.org; auth=none X-HELO: fossa.birch.relay.mailchannels.net X-Sender-Id: dreamhost|x-authsender|siddhesh@gotplt.org X-Sender-Id: dreamhost|x-authsender|siddhesh@gotplt.org X-MC-Relay: Neutral X-MailChannels-SenderId: dreamhost|x-authsender|siddhesh@gotplt.org X-MailChannels-Auth-Id: dreamhost X-Minister-Coil: 0c77628540e18e32_1579087932845_2818195435 X-MC-Loop-Signature: 1579087932845:2159630443 X-MC-Ingress-Time: 1579087932844 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gotplt.org; h=subject:to :references:from:message-id:date:mime-version:in-reply-to :content-type:content-transfer-encoding; s=gotplt.org; bh=Efx151 59L9FZ5jDbPrgog7rJ9x8=; b=oYnV5vNEXIEeyKn/LhW+13tpWxtU49Z0QtTauF CX7dyBSrUgYfnliFyVXsN2KP3QocYbVr0iSmHxb+5kAn63L7k2ateEyeeqg7CjeA heUe6uVAjJh7ppCHoVn6xsU2S0kiit19SJ9/kOKopeuA2xvO3NPttW8kUKRXk79L FiQIM= Subject: Re: Loss of vDSO support on s390x To: Florian Weimer , libc-alpha@sourceware.org, Adhemerval Zanella References: <87a76p2glt.fsf@oldenburg2.str.redhat.com> X-DH-BACKEND: pdx1-sub0-mail-a21 From: Siddhesh Poyarekar Message-ID: <3dd00738-e07f-8c87-d208-4196a4e44a75@gotplt.org> Date: Wed, 15 Jan 2020 17:01:50 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.1 MIME-Version: 1.0 In-Reply-To: <87a76p2glt.fsf@oldenburg2.str.redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-VR-OUT-STATUS: OK X-VR-OUT-SCORE: -100 X-VR-OUT-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedugedrtdefgddvlecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucggtfgfnhhsuhgsshgtrhhisggvpdfftffgtefojffquffvnecuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefuvfhfhffkffgfgggjtgfgsehtjeertddtfeejnecuhfhrohhmpefuihguughhvghshhcurfhohigrrhgvkhgrrhcuoehsihguughhvghshhesghhothhplhhtrdhorhhgqeenucfkphepuddvfedrvdehvddrvddtvddrudejvdenucfrrghrrghmpehmohguvgepshhmthhppdhhvghloheplgduledvrdduieekrddurdeljegnpdhinhgvthepuddvfedrvdehvddrvddtvddrudejvddprhgvthhurhhnqdhprghthhepufhiugguhhgvshhhucfrohihrghrvghkrghruceoshhiugguhhgvshhhsehgohhtphhlthdrohhrgheqpdhmrghilhhfrhhomhepshhiugguhhgvshhhsehgohhtphhlthdrohhrghdpnhhrtghpthhtohepfhifvghimhgvrhesrhgvughhrghtrdgtohhmnecuvehluhhsthgvrhfuihiivgeptd On 15/01/20 3:20 pm, Florian Weimer wrote: > time, gettimeofday, and clock_gettime always seem to make system calls > now. > > Is this intentional? I'm worried that this is a major performance > regression. +Adhemerval; this may be related to the vDSO patchset. Siddhesh