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 A10CE145FE0; Tue, 15 Apr 2025 13:57:06 +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=1744725428; cv=none; b=A6eHYqmIvdQ6mQRJlt+PDbDOv3mu/+MzzZr5iXMD0FrdsOoIR+qmSTGS48jpmYEZ2TRmqPNvYfJCUqn/1XGGln5ZoUCA2ZRJiymXyXlxLbg6WMEXURjM+25JMl6yZtkLUtWRL5z87OIGiiiPLGPa22EUmOAdhSgs3SZrwLyO5iE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744725428; c=relaxed/simple; bh=0l8w+naLLR2m9/EluSyXqkppDcRiCHUv816MhV+FDbQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=eac9D+JNLpRMcg+nYEP88IsZVt6IxHf2/SXYHpyyKiQOtr9m2t+ah8H4LG8fYF1Sb9xTL3F98mYUa9bum25il34bItblvRqOLBFkOI+M+Jw9OEVRbbt6Piv3NqJVxQlek//s7AjxfF6077YoX/cn5MWlQm4TMTpu0Guu35JT59A= 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=CAfllJvk; arc=none smtp.client-ip=90.155.92.199 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="CAfllJvk" 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=0l8w+naLLR2m9/EluSyXqkppDcRiCHUv816MhV+FDbQ=; b=CAfllJvk000h2k9cx428yTFAJr n3gYvMUBu3Wfscc3DQte0kLFJPHKr3NrTD67NsdZ1qyjoyQ3nENzM6UXS25qbRkAKdMwc+LBxxwqe 61levoJoAvaKZEgtwTCK5ZYg9RDHf1gidiXWIgMv8vZgLxak6kIBC27TN1Sr/wRivRtEHOmNmVFcG vMa4V5/uYtZuRPsxPBsXA3dlCBrCO1pUts5Q0uGWsI+VebwqYE7IscJnWxsqqf+ZJ1mwINFVuptwA IGxkix/yFGqRS1uRIyh7lwEX44qP89i5fYkyfwaub/Mv4kCUCZqaoWUKWwnvY3LfWRYql6QDbr8wD L+4N4wOQ==; 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 4.98.1 #2 (Red Hat Linux)) id 1u4gmb-00000009u8U-2P5h; Tue, 15 Apr 2025 13:57:01 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 28C4730037D; Tue, 15 Apr 2025 15:57:01 +0200 (CEST) Date: Tue, 15 Apr 2025 15:57:00 +0200 From: Peter Zijlstra To: Dapeng Mi 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 v3 10/22] perf/x86/intel: Process arch-PEBS records or record fragments Message-ID: <20250415135700.GD4031@noisy.programming.kicks-ass.net> References: <20250415114428.341182-1-dapeng1.mi@linux.intel.com> <20250415114428.341182-11-dapeng1.mi@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: <20250415114428.341182-11-dapeng1.mi@linux.intel.com> On Tue, Apr 15, 2025 at 11:44:16AM +0000, Dapeng Mi wrote: > A significant difference with adaptive PEBS is that arch-PEBS record > supports fragments which means an arch-PEBS record could be split into > several independent fragments which have its own arch-PEBS header in > each fragment. With the constraint that all fragments for a single event are contiguous, right?