From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756916AbdLPSrM (ORCPT ); Sat, 16 Dec 2017 13:47:12 -0500 Received: from mga12.intel.com ([192.55.52.136]:50168 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756694AbdLPSrI (ORCPT ); Sat, 16 Dec 2017 13:47:08 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,411,1508828400"; d="scan'208";a="13182807" Date: Sat, 16 Dec 2017 10:47:01 -0800 From: Andi Kleen To: John Garry Cc: Jiri Olsa , peterz@infradead.org, mingo@redhat.com, acme@kernel.org, alexander.shishkin@linux.intel.com, namhyung@kernel.org, wcohen@redhat.com, will.deacon@arm.com, ganapatrao.kulkarni@cavium.com, catalin.marinas@arm.com, mark.rutland@arm.com, xuwei5@hisilicon.com, linuxarm@huawei.com, zhangshaokun@hisilicon.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 2/5] perf jevents: add support for arch recommended events Message-ID: <20171216184701.GB25156@tassilo.jf.intel.com> References: <1512490399-94107-1-git-send-email-john.garry@huawei.com> <1512490399-94107-3-git-send-email-john.garry@huawei.com> <20171206133607.GA12508@krava> <20171208122918.GE2799@krava> <20171209073104.GB14297@krava> <5d322353-2785-a99f-bcd8-b948bd6cb09a@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5d322353-2785-a99f-bcd8-b948bd6cb09a@huawei.com> User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Won't this all potentially have a big maintainence cost? No. It's all auto generated. The only cost is slightly bigger binary size. I would hope your event files are auto generated too. > I just don't know how this schema scales with more archs and more platforms > supported. It's just early days now... Only perf will get slightly bigger, but memory is not exactly expensive. In fact, the extra memory won't even be faulted in if it's not used, so it's only disk space. -Andi From mboxrd@z Thu Jan 1 00:00:00 1970 From: ak@linux.intel.com (Andi Kleen) Date: Sat, 16 Dec 2017 10:47:01 -0800 Subject: [RFC PATCH 2/5] perf jevents: add support for arch recommended events In-Reply-To: <5d322353-2785-a99f-bcd8-b948bd6cb09a@huawei.com> References: <1512490399-94107-1-git-send-email-john.garry@huawei.com> <1512490399-94107-3-git-send-email-john.garry@huawei.com> <20171206133607.GA12508@krava> <20171208122918.GE2799@krava> <20171209073104.GB14297@krava> <5d322353-2785-a99f-bcd8-b948bd6cb09a@huawei.com> Message-ID: <20171216184701.GB25156@tassilo.jf.intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org > Won't this all potentially have a big maintainence cost? No. It's all auto generated. The only cost is slightly bigger binary size. I would hope your event files are auto generated too. > I just don't know how this schema scales with more archs and more platforms > supported. It's just early days now... Only perf will get slightly bigger, but memory is not exactly expensive. In fact, the extra memory won't even be faulted in if it's not used, so it's only disk space. -Andi