From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (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 8E150482CD; Fri, 20 Dec 2024 19:36:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734723378; cv=none; b=lhI2F3g+o4GTyv/TRM3axVbIo28aFM+P/lZopR8vAEbPMoATknsuWSU2v2LjS1cvb17/N6y1WIRmbg9ryOVb4UnJRIqeVPjhoc37lWA/IUcML6xNUO7xWBZtNUHqzRkDa8Yy3cLN3UeF9NAm0jK8BeW5tUqcDfy1rfB70b+arIw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734723378; c=relaxed/simple; bh=6jTJd9J16ZjQkqne3jRNNL0bVsInVxBnf0unHWuxKbg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Ilul0IMiP2+hYUgRNv91u9gB69znB1BajSHQGhEiBZwpU4H4o/8S82Quu3ZJ6Nd9d8GJ7+eK2AAXEdRiWHlC0r7TRtjkDU2xpYZlnjwcFZIc7lL4xJqviPBfP1hx5TLk45lkVZfL9r4fTizgSh6UlOrV1AsmaJcgEixdMFHsh20= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=JskPITrt; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="JskPITrt" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1734723376; x=1766259376; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=6jTJd9J16ZjQkqne3jRNNL0bVsInVxBnf0unHWuxKbg=; b=JskPITrtTXhVOOuaEi2my/t2g1Ij3lZzGmgrEc301+jacyMgeOaR5hNQ KDRtKeVc9jZOL4znLTxRV0NoT7NgH4Q5hz8KRNnTGv/o574RmO/sOXJZC 8AwgpQ1m7KW+B8Xsyx5UjBSjHvJlnK7fzNABAKFPs1RS8rE33oHIhwIai JHrDqr/NrdRAomIRWRkEuWLwgzK7i45qO398t1w/Iduw5HkrBP6EdzNJu xOsAf0+GblbYbYVZp62Feo0+f8Ay6+mg3+BW7CRoOGBGk+XUmDq0LZr3H 8J9jUAUgnTAzaW55kofEbOQA+klNshWXFNv6ofqSiz/wz4bIhEeO25eHo A==; X-CSE-ConnectionGUID: 4iKisNB5S/qc3UlrsaGLKA== X-CSE-MsgGUID: R+rjQZ6HSQOjSUT+8MwySQ== X-IronPort-AV: E=McAfee;i="6700,10204,11292"; a="57754588" X-IronPort-AV: E=Sophos;i="6.12,251,1728975600"; d="scan'208";a="57754588" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2024 11:36:16 -0800 X-CSE-ConnectionGUID: 9QiSxdOMSHOFInRjyOlQwg== X-CSE-MsgGUID: hVvxZSH3TeaNo+T7DyIaxw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="135944371" Received: from soc-cp83kr3.clients.intel.com (HELO [10.24.8.90]) ([10.24.8.90]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2024 11:36:16 -0800 Message-ID: <74fd8a75-66c6-40a8-9ec3-d7aa74469755@intel.com> Date: Fri, 20 Dec 2024 11:36:15 -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 v3] perf: map pages in advance To: David Hildenbrand , Lorenzo Stoakes Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Matthew Wilcox , Yi Lai References: <20241205082948.56212-1-lorenzo.stoakes@oracle.com> <65a04f0d-668b-47b6-a532-d1e11ef4835a@intel.com> <4ded2d63-03dd-498e-9810-690a9eff0c22@lucifer.local> <860a1ef0-678d-414d-8511-9695b90c3ca0@redhat.com> Content-Language: en-US From: "Chen, Zide" In-Reply-To: <860a1ef0-678d-414d-8511-9695b90c3ca0@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/20/2024 1:56 AM, David Hildenbrand wrote: > On 20.12.24 10:31, Lorenzo Stoakes wrote: >> On Thu, Dec 19, 2024 at 01:17:44PM -0800, Chen, Zide wrote: >> >>> With this patch, it seems perf tool has some problems in capturing the >>> kernel data with Intel PT. >>> >>> Running the following commands, the size of perf.data is very small, and >>> perf script can't find any valid records. >>> >>> perf record -e intel_pt//u -- /bin/ls >>> perf script --insn-trace >>> >>> >> >> Hi, >> >> I'm on leave (and should really go back to relaxing :>), returning on 2nd >> Jan so can't really dig into this. >> >> But I tried it on my intel box and it 'works on my machine' with and >> without patch with commands provided, so I'm not sure this is actually a >> product of this change (which shouldn't impact this). > > Zide Chen, can you try with and without this patch to see if it > introduces the issue? Yes, I re-did the test on a SPR server, and the result is same. Without the patch, it went well; But with it, "perf script --insn-trace" doesn't show valid records. This time I tested it on the clean 6.13-rc1 tag, base commit 40384c840ea1944d7c5a392e8975ed088ecf0b37 Also, with this patch, running tools/perf/tests/shell/test_intel_pt.sh: Error: The - data has no samples!