From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793810220; b=HkLsDAdi561eKHWI1mMIdD76mf7XxVSk4NplVsS+9MEQPftEj0aF2zl+s9TjN+rDO5Fo JxuO2I9W4IH4kD2wle4d9nLDHqXpn8pJx309HwmxnPqqzoMm82B/rfMQA24hYfbXRYzyT hYXyssAZYL4mzBCb3tL1XMrBR60mH8VQfU4iQVFTSYLNKgbpro5zxbGKSknVpnW0hNVD0 DiL5dzrqXIFYl2XvmzCoFNtoSxaJhajevWsKzjQUjaH7TVIWjAihfzUu9hIpGq7LHIYVn XrzfI7ONY6yZvjLGrHXFtq82x/v/Pb0F9m6NMRH/j4YyS7U9gkZzULK9ulcIuPVKgIQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793810220; h=DMARC-Filter:Received:Received:DKIM-Signature:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; bh=r6w6jR99bB94qAc68qR7iE7VIhnx4AziUbUQ0fbongs=; b=X2FbpJOT0NfThrlAzb17uK4JiP5ph13G3HfOCIYs2dkTKFYBJ3e9yUQPqes1Qam3gtJR VEZ+ybSMez/+e+gx7op2S6Bc7u3zvV1De4k9FUhSL2OfF53GzRybjLUmjH4gsTOKiBJ8f f53T+IlGbPFJoVAVCMrwtSO9lcrr70G6ZAi0eGygD/+qqGupCCExWqCTBlYwpXt0FLkyJ I6TL+t8IGtDg2pzPl24aGPA4mPgji2mHdm2gkBMv9AZRyUkK3byo71ShVn56ozIgGZ+rW d5bfPbhmLdAgfnTavj0XILC4uEZ/3F9zbLfQmouSjxqnNHknlUn9ECv9Zmx+/yw9kmA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=hu04Qx2P; arc=none smtp.remote-ip=217.140.110.172 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 42EAA606A326; Wed, 4 Nov 2026 16:37:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 42EAA606A326 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=hu04Qx2P Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 79F6A169C; Wed, 4 Nov 2026 08:36:56 -0800 (PST) Received: from localhost (unknown [10.2.196.114]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 25CEC3F632; Wed, 4 Nov 2026 08:36:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793810219; bh=VvHXa2PKN/PXsjHg761V8vVCnlwth46l0sbGcvt/N9g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hu04Qx2PtBWMFTy6e0QSl/q4rHhJYgWmAcqqx4YB+BkD26yFTgCa6wz1MabgdLErS y/K0GBMMcE/iG9/bglXlhZ1TyoXSxJzGMQFJvutQFbhwI7+wuCYK4FKLpb+og8meRX Xi58ZxsS0WFud0JY03LcT8OWOOJDupHT0yuu82rI= Date: Wed, 4 Nov 2026 16:36:57 +0000 From: Leo Yan To: James Clark Cc: Leo Yan , Adrian Hunter , Suzuki K Poulose , Mike Leach , Will Deacon , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Mathieu Poirier , Jonathan Corbet , Shuah Khan , Suyash Mahar , Amir Ayupov , linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , linux-doc@vger.kernel.org, John Garry Subject: Re: [PATCH v3 05/18] perf test: cs-etm: Increase window size in disassembly test Message-ID: <20261104163657.GJ9176@e132581.arm.com> References: <20261102-james-cs-unformatted-per-thread-fix-v3-0-dbcb0c281b9b@linaro.org> <20261102-james-cs-unformatted-per-thread-fix-v3-5-dbcb0c281b9b@linaro.org> X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261102-james-cs-unformatted-per-thread-fix-v3-5-dbcb0c281b9b@linaro.org> On Mon, Nov 02, 2026 at 12:15:19PM +0000, James Clark wrote: > When we increase the default timestamp interval in a later commit, less > trace will be recorded. At the moment the amount of trace overflows the > 64K buffer, so the exit snapshot trace is what happened at the end of > the process rather than the beginning. With the new default interval, > the entire execution will be contained in one buffer and the first few > samples are always various instruction and data faults. These go to the > kernel so don't result in ranges that can be disassembled. > > Increase the window to 6 samples to ensure something with a branch can > be disassembled even with the fault samples. > > Signed-off-by: James Clark I don't mind to set even a bigger sample number (like 50). I did test and 50 samples just add 0.5s run time. Either is fine: Reviewed-by: Leo Yan