From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6870C148FE0 for ; Mon, 8 Jul 2024 17:10:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720458607; cv=none; b=nIINzgf6UGcTTYDzRapCq1HzCE5I1LwuHMeWebG5Od1et1EZ4jmhQlQ97t3Y423g07do4TZOsTE08SUdMkVbzuCn/S0cGoA4X/BCER9aBjiaPlqARnEwE98pCNO1sOewxJOPGwwacsCELy9sdu5f8D7/EHAPwC5DDTNdMlIKUT0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720458607; c=relaxed/simple; bh=EGd2yo27txc8dxln05GNOEN8Bez164dZrryvSFcCD1M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dd2cBMPd3qxCwq8H1OpV935SCRclI4iTGJR3TASmxZwSHzkv1W4qqCiYCx0Zrovie8kH2brz8EuRUyVNWeRtEMF4lyUBO21xL4EMhMPbTyEQEbpx4LlCpTonAvAL9vkovf+T/3JPyKHjU8Z38jWZxnAcLgRA6c5Z8e5gwuGwP/o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA491C4AF0A; Mon, 8 Jul 2024 17:10:04 +0000 (UTC) Date: Mon, 8 Jul 2024 18:10:02 +0100 From: Catalin Marinas To: Beata Michalska Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ionela.voinescu@arm.com, sudeep.holla@arm.com, will@kernel.org, vincent.guittot@linaro.org, vanshikonda@os.amperecomputing.com, sumitg@nvidia.com, yang@os.amperecomputing.com, lihuisong@huawei.com, viresh.kumar@linaro.org, rafael@kernel.org Subject: Re: [PATCH v6 0/4] Add support for AArch64 AMUv1-based arch_freq_get_on_cpu Message-ID: References: <20240603082154.3830591-1-beata.michalska@arm.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: <20240603082154.3830591-1-beata.michalska@arm.com> Hi Beata, On Mon, Jun 03, 2024 at 09:21:50AM +0100, Beata Michalska wrote: > Introducing arm64 specific version of arch_freq_get_on_cpu, cashing on > existing implementation for FIE and AMUv1 support: the frequency scale > factor, updated on each sched tick, serves as a base for retrieving > the frequency for a given CPU, representing an average frequency > reported between the ticks - thus its accuracy is limited. > > The changes have been rather lightly (due to some limitations) tested on > an FVP model. Note that some small discrepancies have been observed while > testing (on the model) and this is currently being investigated, though it > should not have any significant impact on the overall results. What's the plan with this series? Are you still investigating those discrepancies or is it good to go? -- Catalin