From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 E0C183D646B for ; Wed, 25 Feb 2026 16:49:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772038169; cv=none; b=aos8KjX4Yey5r0RtH2GBdKDXm+h4VcHIpUMw4sBweRK5BQweEOXlVIgjUqYRf2ovJHBnsT2lzRvbVmHoWUf1ph18DBLzlOhBG594fK5emWbm6N2Pv4pREWu0T+DVf9SM3ANJ37nzw7dhcDGZl+OIbp+oSX4pPhCW0msKfSRu41w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772038169; c=relaxed/simple; bh=PMbdZGmi6fBeQ/S55sybP/8FMps7iD64+2WcXfG2HJo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=FVfiw9OSQLfGMfri3MGM6PvRAoxbGpHidsSvqpXm4uDjKtU/RmRdbV98OB7LZi+TmBKcZrXObQ2zGwo+Eei0f928D4XEA8c9Q3tkAruUR0pKUU/OkIzTzMlGvBnM9vjN3HI6hJFQbJ9ITGN6+pENg2EkOmNe7/eWZxVHAVN8IWs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=jx7GLxzf; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="jx7GLxzf" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=zyU0HcH0gMih1bj1MogZlYZu60pdHUu01dQOJTywwYM=; b=jx7GLxzf7rHwv6N3Tz0PX/1NaP Nf307y49ISYzsN97Uhe5/mG58CjciadY3UtpMcQzdjZGQgUid8Ma9PwDFojwjz+kIn+1WCnz1lT99 T0NX1L1PdlGoqXUVjw2F4mILGFV8BKKnx99MrckmXHRtBqoujLvVGXXDRdl+z48pyhBlzjFn0YCkQ BogSubhtB72GPqJZS5/9xqdQ1ip+l2Fyk5jPDu+isgBOjEhqz4CWqHe6pRwapeh/dhyRPsHFHYaNg 0QtvZwfzy9AQLFNXCdrf+ktRvChHo9spC8NY34DOwrdCKnuAIwOt6rP8xz7CfM70259Zl5AS9TnyF 1t5kqcEQ==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvI4b-00000009U0z-0vPO; Wed, 25 Feb 2026 16:49:17 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id B740E301BD5; Wed, 25 Feb 2026 17:49:16 +0100 (CET) Date: Wed, 25 Feb 2026 17:49:16 +0100 From: Peter Zijlstra To: Kyle Meyer Cc: tim.c.chen@linux.intel.com, bp@alien8.de, dave.hansen@linux.intel.com, mingo@redhat.com, tglx@kernel.org, vinicius.gomes@intel.com, brgerst@gmail.com, hpa@zytor.com, kprateek.nayak@amd.com, linux-kernel@vger.kernel.org, patryk.wlazlyn@linux.intel.com, rafael.j.wysocki@intel.com, russ.anderson@hpe.com, x86@kernel.org, yu.c.chen@intel.com, zhao1.liu@intel.com Subject: Re: [PATCH v2] sched/topology: Check average distances to remote packages Message-ID: <20260225164916.GE1282955@noisy.programming.kicks-ass.net> References: <20260223170314.GU1395266@noisy.programming.kicks-ass.net> <20260225123052.GN3016024@noisy.programming.kicks-ass.net> 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: On Wed, Feb 25, 2026 at 10:41:38AM -0600, Kyle Meyer wrote: > On Wed, Feb 25, 2026 at 01:30:52PM +0100, Peter Zijlstra wrote: > > The original case was for SNC-3, the above looks to be SNC-2. Does your > > system also support SNC-3? > > We do not currently use SKUs that support SNC-3. > > That distance would be set to 12: > > node 0 1 2 > 0: 10 12 12 > 1: 12 10 12 > 2: 12 12 10 > > That might be changed if there's actually a difference in distance. > > Distances to adjacent sockets, non-adjacent sockets, and different chassis would > remain the same. OK, excellent. So its just the Intel reference systems that are crazy.