From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E8BD2459CC; Wed, 26 Feb 2025 09:48:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740563332; cv=none; b=ZMVWMYhxkMzgrqLE2H3yABLOUZrwM1XAWCfO7AcwLGcVjSr1hytPIYG91JriekQfTD0YvrADD4eyigK7ZUx8FY28jk8bvaZLJXcn1Jr2NX/E9Le496HJk5akfliRdD0u+Ychl0pMjEhL7cksc+DM1/yTd8w/5wG2FBTRe6ntCXA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740563332; c=relaxed/simple; bh=QP93zTpIBj69URrJI/doxAsbsvpPaRP3UufccvOM9RI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=N8YC/YuGxKnKClnV993ghAu5QfaM+9jmt7AOXBuu2iDY44uPKXc6e+syYLSy6b00iENFg28+Jgfw/YkC5YqH9zr2PlgwMGzED5wM47h/vyRelKNtjAQG2bqlw79XbS8jHx5PyAqVGIoFuV8MLJJMIIFJRFmjYNYmsQjZ8hS0yfo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=OAyxZ13v; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="OAyxZ13v" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=871hFDdRTS+OmWOz6zBCg95pt62GNhL4S6ODQibnhm4=; b=OAyxZ13v6drg2o41uBYCpG7hpY YYwg7sFxGpGwOQLo/KE1Q0SNOr+2oXD103PoW7Z1HHVk+d5+BC3jxteMpEXlS/wzDMkE1m3+grPOS Ru8iG2HGLHa6XRSpxnIx5Pz6kOMJwdJyWkz7bOTEgnSgwp/V1lYewaz6bi1r6JX2e/TVtCuywrDxP xbsBMClWmez6YU2/rqC8izSbVTVygxW+aKGRi57QYct//tXbzL0o658FrQkvAuXvxZNvj9nYaGW5M pokONrO/k8BZbDDXakEQ9Bz2iB00aRUnG2Hh+8RLOQvEKFbWlLhew/4ggqJLkFo6i1wTGVUcU2J48 CHjTNZJA==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1tnE1y-0000000Ep3b-2VNh; Wed, 26 Feb 2025 09:48:42 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 992A3300677; Wed, 26 Feb 2025 10:48:41 +0100 (CET) Date: Wed, 26 Feb 2025 10:48:41 +0100 From: Peter Zijlstra To: "Mi, Dapeng" Cc: Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Ian Rogers , Adrian Hunter , Alexander Shishkin , Kan Liang , Andi Kleen , Eranian Stephane , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Dapeng Mi Subject: Re: [Patch v2 12/24] perf/x86/intel: Allocate arch-PEBS buffer and initialize PEBS_BASE MSR Message-ID: <20250226094841.GT11590@noisy.programming.kicks-ass.net> References: <20250218152818.158614-1-dapeng1.mi@linux.intel.com> <20250218152818.158614-13-dapeng1.mi@linux.intel.com> <20250225112543.GM11590@noisy.programming.kicks-ass.net> <000043b8-1284-46f3-b117-9ece905f218e@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000043b8-1284-46f3-b117-9ece905f218e@linux.intel.com> On Wed, Feb 26, 2025 at 02:19:15PM +0800, Mi, Dapeng wrote: > > On 2/25/2025 7:25 PM, Peter Zijlstra wrote: > > On Tue, Feb 18, 2025 at 03:28:06PM +0000, Dapeng Mi wrote: > >> Arch-PEBS introduces a new MSR IA32_PEBS_BASE to store the arch-PEBS > >> buffer physical address. This patch allocates arch-PEBS buffer and then > >> initialize IA32_PEBS_BASE MSR with the buffer physical address. > > Just to clarify, parts with ARCH PEBS will not have BTS and thus not > > have DS? > > No, DS and BTS still exist along with arch-PEBS, only the legacy DS based > PEBS is unavailable and replaced by arch-PEBS. Joy. Is anybody still using BTS now that we have PT? I thought PT was supposed to be the better BTS.