From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A847C15ECCC; Wed, 3 Jun 2026 17:12:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780506756; cv=none; b=YDxmCML9S1lWfOrEeZdt8mb8ZIfwHJIsC6AqVOajqgfXgmv8pt/WDaizM0Fv4Exrqv2KePR+gN733zQ7xQJ3dLOCmE0fui8pgIPk6MYrqWn8FP7bU1HbSTV++jaPpuT+1E1FeYYdyXceuW6E3uM1qXvqcU7gFyp2/FFvRh8dvCg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780506756; c=relaxed/simple; bh=/vWRA/BU+uqdw/xlSamShXJibi4CtKGGpZV0RcYVwk8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=OvbomM9BA6KRZCaskUvh0dX7BfUORVKoGPT4nxj2HTzxPQWked5TNHK4HfZpqlAErLFRDI7zQlOGvbIIODseYyv5EBFHJ1xbTY0860s1bMiFcFyAKamVsqHixlj7bUJnF1jxSFU9rgmulbs5U8tWMtHNOHRfQoJ/r8/bueJooIg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=Gfs3A0Iz; arc=none smtp.client-ip=217.140.110.172 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) header.d=arm.com header.i=@arm.com header.b="Gfs3A0Iz" 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 270F1307A; Wed, 3 Jun 2026 10:12:30 -0700 (PDT) Received: from localhost (e132581.arm.com [10.1.196.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3D8A33F632; Wed, 3 Jun 2026 10:12:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1780506755; bh=/vWRA/BU+uqdw/xlSamShXJibi4CtKGGpZV0RcYVwk8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Gfs3A0IzYiygMT7yUvzbOBtQcIkFgLg6Uzrx70Pl5qVNZy4bHQDh/VSyoNK7WyNB1 nAcB+i2ogiITJifqlQXEJ+33KyM+sU3EFOTUHW85kAnrA5o4ovW8dVRnXWxV1WOyiG 2qBPvOa2rTMaCQgAQwkwDopihl5PkanxOgcoSJe8= Date: Wed, 3 Jun 2026 18:12:31 +0100 From: Leo Yan To: James Clark Cc: Suzuki K Poulose , Mike Leach , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Ian Rogers , Amir Ayupov , Jonathan Corbet , Shuah Khan , Paschalis Mpeis , coresight@lists.linaro.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , linux-doc@vger.kernel.org Subject: Re: [PATCH v2 12/18] perf test cs-etm: Reduce snapshot size Message-ID: <20260603171231.GC101133@e132581.arm.com> References: <20260602-james-cs-context-tracking-fix-v2-0-85b5ce6f55c6@linaro.org> <20260602-james-cs-context-tracking-fix-v2-12-85b5ce6f55c6@linaro.org> Precedence: bulk X-Mailing-List: linux-doc@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: <20260602-james-cs-context-tracking-fix-v2-12-85b5ce6f55c6@linaro.org> On Tue, Jun 02, 2026 at 03:26:54PM +0100, James Clark wrote: > The default buffer size for root is 4MB which is very slow to decode. We > only need a few KB to verify that the dd process is hit so reduce the > size to 128KB. > > Signed-off-by: James Clark Reviewed-by: Leo Yan