From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id dLFUIa21kWQtDAkAWB0awg (envelope-from ) for ; Tue, 20 Jun 2023 10:20:29 -0400 Authentication-Results: simark.ca; dkim=pass (2048-bit key; unprotected) header.d=lists.lttng.org header.i=@lists.lttng.org header.a=rsa-sha256 header.s=default header.b=teKJpC35; dkim-atps=neutral Received: by simark.ca (Postfix, from userid 112) id 79CC11E0BB; Tue, 20 Jun 2023 10:20:29 -0400 (EDT) Received: from lists.lttng.org (lists.lttng.org [167.114.26.123]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id 575131E0AC for ; Tue, 20 Jun 2023 10:20:27 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lists.lttng.org; s=default; t=1687270826; bh=j3sw+3Kwexmpp9ESacnanh55BPBewMMPEMmUDen+0RQ=; h=Date:To:References:In-Reply-To:Subject:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To: From; b=teKJpC35bei7fPESt8f1CnocYNs4RzhuEGDyAE+4Ryb04GXd7z0+PydDd0velq28F PErY2NCHvt2cSacR6U6Td6C4affIMUr4vcgQSU/DxrqCXqW41b+zduym3KrZPJd2b+ JGCshXeA9v5y42i+CquQ+F9jECmrPsdR3eAunvMGueBSO2C/B2YOtuEBzoa6jFwz90 quEcMqMo1ysxJO1jd7b2GP0FUPxjF7v++8Y9d+YeVKBTI2dvMOiOcyn9RNb7fAT3XW saethvGB2iLEd3Xbhv+82i2XdWi2Hkmz+kAgm8wXJa1p0ulHQYcRRntYvNOb6lkNkj NU3zmbVA2HOSw== Received: from lists-lttng01.efficios.com (localhost [IPv6:::1]) by lists.lttng.org (Postfix) with ESMTP id 4Qlpgt4wPtz1yCD; Tue, 20 Jun 2023 10:20:26 -0400 (EDT) Received: from smtpout.efficios.com (smtpout.efficios.com [167.114.26.122]) by lists.lttng.org (Postfix) with ESMTPS id 4Qlpgs5Ghjz1yCC for ; Tue, 20 Jun 2023 10:20:25 -0400 (EDT) Received: from [172.16.0.134] (192-222-143-198.qc.cable.ebox.net [192.222.143.198]) by smtpout.efficios.com (Postfix) with ESMTPSA id 4Qlpgc6tGDz18kj; Tue, 20 Jun 2023 10:20:12 -0400 (EDT) Message-ID: <63288a1f-59b4-80f9-2a26-bc252ce9cd1f@efficios.com> Date: Tue, 20 Jun 2023 10:20:34 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Content-Language: en-US To: "Mousa, Anas" , "lttng-dev@lists.lttng.org" References: <6e06b605ec9f446da5dc8948c8621518@amazon.com> In-Reply-To: <6e06b605ec9f446da5dc8948c8621518@amazon.com> Subject: Re: [lttng-dev] Profiling LTTng tracepoint latency on different arm platforms X-BeenThere: lttng-dev@lists.lttng.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: LTTng development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Mathieu Desnoyers via lttng-dev Reply-To: Mathieu Desnoyers Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" On 6/20/23 06:27, Mousa, Anas via lttng-dev wrote: > Hello, > > Arethereanysuggestionstorootcausethehighlatencyandpotentiallyimproveiton*platform****1*? > > Thanks and best regards, > > Anas. > I recommend using "perf" when tracing with the sample program in a loop to figure out the hot spots. With that information on the "fast" and "slow" system, we might be able to figure out what differs. Also, comparing the kernel configurations of the two systems can help. Also comparing the glibc versions of the two systems would be relevant. Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. https://www.efficios.com _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev