From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) (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 5CBFD26B0A9; Fri, 7 Nov 2025 08:36:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762504625; cv=none; b=QvrSfj8ttfLQqUcx4p6Tz+wiREZGX9hNkNUy3o9FU0805aUNSROVeth8jS+Z1e4gfG2p0I4FdqAmTMB/xrmsnblfQ/e3oTLq2EQVeRd9uAy7wZCfyoH71sJ90X3LytcJ+4GcJ1T28G52VRs6rowuOcS9OJyQNe+YujZz3hc06AM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762504625; c=relaxed/simple; bh=Y3reWQABlAFnYvu/Zcunyq/onxJiQhoWKZERah3Idzk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=HF6MAqYwi+mvOBiRmWCzq/hX5Kg/wSTHT58TLtD3RioTE+qivg/nQp5h50PYchxgqcqPtRle//gN5oRiAV9eHGq4CFdU4ktnyCQv/yDx6ttXPdc3FfsPQf5FwuqGwRW/8zyUerH/BjvcniMaNydBgmYKfZPdehk5fYVwBm21BK8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Uu8m0Lr6; arc=none smtp.client-ip=198.175.65.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Uu8m0Lr6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1762504616; x=1794040616; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=Y3reWQABlAFnYvu/Zcunyq/onxJiQhoWKZERah3Idzk=; b=Uu8m0Lr60TQgPTvFO0OMWcVqdm4Z1RYiX0YpYd8B5uIw3/QOxe52jDl1 o0IQYPob9qI6fY9pNtcCVocKDD6ceWvkKv+5gQ4g+OfGkYRP5ZsJ/zEcp f+oTYzHwehTr0PvemXCx99KtSNF+zJHOD7ntmz3QF+dvXBo+LEpA/iO4Y B4YxZefR4errvwNqp/XOJ6mn4EGia0LkdckA7L7j9OojbnHYZ9MttfUdH CfruvKX4MLe9Z7PE/4d+rK+ml/XCocC9KX5hG+qgCoBzLevzmJM0D91qm fIdV/ReOiksLtALedmmvml0cb6LpfvJiBKbjuVZwtoXFRMTdpoqQlamrD Q==; X-CSE-ConnectionGUID: Gei2Sza5TOKireD4rKssCQ== X-CSE-MsgGUID: ISUPBvJqT6CZZh5lWuCesg== X-IronPort-AV: E=McAfee;i="6800,10657,11605"; a="64535860" X-IronPort-AV: E=Sophos;i="6.19,286,1754982000"; d="scan'208";a="64535860" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2025 00:36:53 -0800 X-CSE-ConnectionGUID: e7KsLRyETqanf53+R0krBg== X-CSE-MsgGUID: 77pMSZ+tRD+SLdWPo83SVw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,286,1754982000"; d="scan'208";a="192081216" Received: from dapengmi-mobl1.ccr.corp.intel.com (HELO [10.124.232.65]) ([10.124.232.65]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2025 00:36:50 -0800 Message-ID: <0de9c70b-f298-4a9b-9f9c-279115e5d552@linux.intel.com> Date: Fri, 7 Nov 2025 16:36:47 +0800 Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [Patch v9 10/12] perf/x86/intel: Update dyn_constranit base on PEBS event precise level To: Peter Zijlstra 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 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> <20251107082845.GB1508773@noisy.programming.kicks-ass.net> Content-Language: en-US From: "Mi, Dapeng" In-Reply-To: <20251107082845.GB1508773@noisy.programming.kicks-ass.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/7/2025 4:28 PM, Peter Zijlstra wrote: > 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. Thanks. >