Received: by 10.223.176.5 with SMTP id f5csp829413wra; Tue, 30 Jan 2018 20:27:40 -0800 (PST) X-Google-Smtp-Source: AH8x227EERpQo3pphAqhsonTfn7vcFBz7mKMNlFjMO1RngUJ2NJy7kmH9PQqcV+mRHkkeNGZ4gsX X-Received: by 10.101.85.15 with SMTP id f15mr25680663pgr.153.1517372860514; Tue, 30 Jan 2018 20:27:40 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1517372860; cv=none; d=google.com; s=arc-20160816; b=RViRdeG4IeYeYAj5u8B+hWjIvPj+7i7UiUaxlIqE0cH5t7q7qOM0af6GsSISmYa7Vz PRx7LSib/I0B1fe//bMwHplRlm0sVQUvQl6AC6mkL8zsJC19Vnbz8hFOK/cXEJqhaece go8FzIa0SdAwwaadGQzF6V4ED26UOivdPGzXYeGcf85g6CNPpFrkh3dhIEkQOlCgNH4S SuPHaC7L2NMtylm/z3cwgQWeobmORzQ8G5dgy+4xmKiKPvsk1ZxrtprgsU+DkZGWZ4ro EX0uJKTPbywH8tTYxhuUl8iCOdA0sDSgJYDGFghLJ08USqAUh8oYZ0dBwSdSqatopa5g /8Iw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:arc-authentication-results; bh=eZCoOgemvNXNuYHGBBy3fWSACI71Xe44c6IfHiwHWfw=; b=ssFSfDYwTop4o64HOi4jlnOTfa308VBS2KvAJOb3bVlejeK42fxxt1TDPiZ+D+Dsru achCw+S5j3aAkDD1C9t6+EcBavmVgo12bXMnX7jCYNdgY+t+iwSDZ14Hp4ulFyRFezyR AGfJe18kH9ZwB/19vEEl4aS9vW5BafPY/9irh/0nI/rmZNaSVriiaXXG6XmpsPEzxQDF eG9xrzwAB3HZivc94tgPyw+fl+JyUEcp97wFOMj5VjPdd6Hnn1WYiIZ9GwvvoLhVBoFW 9C3aUKg5qQACiyYSocXaJ+8gl2UARPq8u7BHiwH2l09GT63i5wPjMGy4fVtphjjK/qOd x9HA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id k13si823857pgt.102.2018.01.30.20.27.25; Tue, 30 Jan 2018 20:27:40 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753236AbeAaD7x (ORCPT + 99 others); Tue, 30 Jan 2018 22:59:53 -0500 Received: from mga02.intel.com ([134.134.136.20]:7145 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753208AbeAaD7v (ORCPT ); Tue, 30 Jan 2018 22:59:51 -0500 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Jan 2018 19:59:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,437,1511856000"; d="scan'208";a="13871344" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.35]) by orsmga007.jf.intel.com with ESMTP; 30 Jan 2018 19:59:51 -0800 Received: by tassilo.localdomain (Postfix, from userid 1000) id 01D67300A06; Tue, 30 Jan 2018 19:59:41 -0800 (PST) Date: Tue, 30 Jan 2018 19:59:41 -0800 From: Andi Kleen To: Stephane Eranian Cc: Jiri Olsa , "Liang, Kan" , Peter Zijlstra , Ingo Molnar , LKML , Arnaldo Carvalho de Melo , Thomas Gleixner Subject: Re: [PATCH V3 0/5] bugs fix for large PEBS mmap read and rdpmc read Message-ID: <20180131035941.GW26209@tassilo.jf.intel.com> References: <1517243373-355481-1-git-send-email-kan.liang@linux.intel.com> <20180130133917.GC29098@krava> <6d708c09-52a7-a906-b651-b133a7b4f189@linux.intel.com> <20180130150454.GE29098@krava> <35090c62-466a-aec8-b1a3-69def959c1c6@linux.intel.com> <24210bcb-0e4b-58fe-bcda-da30019f6e7e@linux.intel.com> <20180130185212.GA16806@krava> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Still, the part I am missing here, is why asking for > PERF_SAMPLE_PERIOD voids large PEBS. I think it was disabled together with frequency mode (which we could support too, but it's a bit more work) But yes PERIOD could probably be allowed. -Andi