From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gentwo.org (gentwo.org [62.72.0.81]) (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 051582C3749 for ; Tue, 12 Aug 2025 16:57:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.72.0.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755017831; cv=none; b=JIvOVHxuIB5ib42YwyXYKHAG3ZExS/+5/ZTa7u+TYdMdD7Yu0oK8YpY9ajGvHI1vxYfuYoxNP8w1xmxLJ4g5oYT2ptRi03aS87PeFthm+o6nxsHWW5PuHt7nNyAHQvvKXfZiteNfN1JgKTXMqjczdMwUr5kMzxn+zysomFifbUs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755017831; c=relaxed/simple; bh=LITNVwYsu3oS8l/rbSIF4z8H+oLpOrzXSpVP2kU7r8k=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=sl3zzzuPzgOUwsxjtAYVhR2aAfQzlm+uwCwoRAluIgHJsKa89XEPIOaVn1aqI0O5GZP1xALIMc7KAO7goUncwvLMHxHQ8cqifAK68v7b+Qdh1IUILbdc4Fewew8HPuhUwu2uJIkuKOhP/I4FdvkZoyJKPf+xik4p0gRQ+t86VLo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=gentwo.org; spf=pass smtp.mailfrom=gentwo.org; dkim=pass (1024-bit key) header.d=gentwo.org header.i=@gentwo.org header.b=RcV+n56/; arc=none smtp.client-ip=62.72.0.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=gentwo.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gentwo.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=gentwo.org header.i=@gentwo.org header.b="RcV+n56/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gentwo.org; s=default; t=1755016387; bh=LITNVwYsu3oS8l/rbSIF4z8H+oLpOrzXSpVP2kU7r8k=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=RcV+n56//A5TUysROsD7GbH1UfQ2bKozgbi5OYUlMnxswa/FA+2vGCd3rSJaPwyJP bk+elX6ttJIr4JNVohG341E+D0QGpH5wl0/VUYQUfMUxyozSiFtaYp0u5a2RlZLVJb FW2YTV5+geG2g6GeAJzdhQbIYAVyk1s5Dx+d57Qs= Received: by gentwo.org (Postfix, from userid 1003) id 72FA14025D; Tue, 12 Aug 2025 09:33:07 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id 72019401EB; Tue, 12 Aug 2025 09:33:07 -0700 (PDT) Date: Tue, 12 Aug 2025 09:33:07 -0700 (PDT) From: "Christoph Lameter (Ampere)" To: Jeremy Linton cc: Huang Shijie , catalin.marinas@arm.com, will@kernel.org, patches@amperecomputing.com, Shubhang@os.amperecomputing.com, krzysztof.kozlowski@linaro.org, bjorn.andersson@oss.qualcomm.com, geert+renesas@glider.be, arnd@arndb.de, nm@ti.com, ebiggers@kernel.org, nfraprado@collabora.com, prabhakar.mahadev-lad.rj@bp.renesas.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm64: defconfig: enable CONFIG_SCHED_CLUSTER In-Reply-To: Message-ID: References: <20250808025533.6422-1-shijie@os.amperecomputing.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 On Mon, 11 Aug 2025, Jeremy Linton wrote: > From what I've seen, SCHED_CLUSTER seems to be a bit of give and take > depending on benchmark and machine. I'm not sure if it should be default > enabled or not, but it would really be nice to have at least a larger sweep of > benchmarks/machines in order to be sure of the decision. If the hardware provides a clusterid then I think this clusterid should be used for the sched domains. CONFIG_SCHED_CLUSTER does that. So it should be the default. If there is no cluster information then these domains should not be created. I think that is already the case?