From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 A0D3C31064E; Fri, 7 Nov 2025 08:30:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762504234; cv=none; b=sZFcG2DD/wLiDRes+g3rTgKnB8PFSbJEFRrsLnSEKupDQOW8y1Rf1L2S2wIABMIXl79jaYql+MY+RaWBDSbLC0HSeBJS4MAYqGbmjGgx5h57YTbZbujHa4dws0OjJY0R+plLVMhxlVhRm3OoH5Sxfl/1nLQ4LkuzXYW7R/D612I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762504234; c=relaxed/simple; bh=/GDJ7o76Y5uJc2qW1MGc7RcJT8vazPW4ZWKo0tuhWZ0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=AahNVavsQTkBxagk4YOHjNP71SfRxOICX38tLaUJ50GOCLksn6rgl93KCe7nocuLn9HKji7Y1xVnfMkcaW3HygWQAEPahxAKO1BvPyXKXIl9BxBTPJE0LpjHPxfU2FTIJ78FsNCvjr/d8rFqbjh9Vr6gLhGUDrfN6HWZOcV5Yws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=CX2yZ5Ev; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (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="CX2yZ5Ev" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=QtuHvIiLnEpCIAltXZ3QPNFM+VVLhdWSvHUbj92zxRA=; b=CX2yZ5EvC9D4kgUXVekaUskEiC jnVnZC+f3bWQsdQ6Dt2NeAJl9fw6QvvH1BEXkhI4cLErRJOoOxw1oVMdD1kgsM87aK8AIK67vFf5c yLgN26ZHtAF0Pz6PYYKSqPx2XA0osl5nLuoWoY6Eo9ioQuRku7QHqWogojquRn2dcR0yx74Fdhd6c TbUvaUE0wkiO1xYD4ewldbkfp0oYQHquS4MKf3GhT+1O2lXWltjcPcC0GShIStChdFKDLoMGaHFl8 CKZyVldkZCcnBlhRK3rBtdEWJBRmM7vb4n/LhV58bEJYRY7BgyLGjopUl7aaVW/ruKv7ulXqbkptf dSFIueug==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1vHGyE-00000005ylg-3fwE; Fri, 07 Nov 2025 07:34:25 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 038143001D4; Fri, 07 Nov 2025 09:28:46 +0100 (CET) Date: Fri, 7 Nov 2025 09:28:45 +0100 From: Peter Zijlstra To: "Mi, Dapeng" Cc: Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Ian Rogers , Adrian Hunter , Alexander Shishkin , Andi Kleen , Eranian Stephane , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Dapeng Mi , Zide Chen , Falcon Thomas , Xudong Hao Subject: Re: [Patch v9 10/12] perf/x86/intel: Update dyn_constranit base on PEBS event precise level Message-ID: <20251107082845.GB1508773@noisy.programming.kicks-ass.net> References: <20251029102136.61364-1-dapeng1.mi@linux.intel.com> <20251029102136.61364-11-dapeng1.mi@linux.intel.com> <20251106145217.GA4067720@noisy.programming.kicks-ass.net> <09210c12-cc61-4af5-bd13-830fd9650f9b@linux.intel.com> Precedence: bulk X-Mailing-List: linux-perf-users@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: <09210c12-cc61-4af5-bd13-830fd9650f9b@linux.intel.com> On Fri, Nov 07, 2025 at 02:11:09PM +0800, Mi, Dapeng wrote: > > On 11/6/2025 10:52 PM, Peter Zijlstra wrote: > > On Wed, Oct 29, 2025 at 06:21:34PM +0800, Dapeng Mi wrote: > >> arch-PEBS provides CPUIDs to enumerate which counters support PEBS > >> sampling and precise distribution PEBS sampling. Thus PEBS constraints > >> should be dynamically configured base on these counter and precise > >> distribution bitmap instead of defining them statically. > >> > >> Update event dyn_constraint base on PEBS event precise level. > > What happened to this: > > > > https://lore.kernel.org/all/e0b25b3e-aec0-4c43-9ab2-907186b56c71@linux.intel.com/ > > About the issue, Kan ever posted a patch to mitigate the risk, but it seems > the patch is not merged yet. > > https://lore.kernel.org/all/20250512175542.2000708-1-kan.liang@linux.intel.com/ > Clearly it became a victim of some scatter brained maintainer or something. Let me stick that near this set and go read the last few patches.