From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f169.google.com (mail-pf1-f169.google.com [209.85.210.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A8A5A41C85 for ; Tue, 6 Aug 2024 18:00:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722967256; cv=none; b=bXSGKjI20RBCBYwRmXAY8KREKW1uDwbvVG/wBkT1Riu7qqayJOl8xyWEQpziOdrqpDwhVUrsRpRMVss3dRBJvt3Vj4aki+Qb03JZ1Dg1F/NUowMYAjwI2biamV4T7gmeyEc5kdq5VtR06TTEjc1xF9alD/2E1sa7iTivbQpk6Xw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722967256; c=relaxed/simple; bh=caybVKr8EPWx0odtlLt1uBSypBqrm29kv6r7neyat+o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LE1lAgreN/rren2UBBhm951UstYeI2/w69HWVmZcEudnyEW5J1uUj41RSFlSDg2avdeKsKnXUXOo3X38mglOdaB37mUhQ3Bwhz9A9/CCQyqxSsWGHDc7yG68MZLbjNdkdzXKxBL8G1/P5YGhtmzIemYrKrWh+X2vbaCzGHpKeds= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=bcXFh1kY; arc=none smtp.client-ip=209.85.210.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bcXFh1kY" Received: by mail-pf1-f169.google.com with SMTP id d2e1a72fcca58-70eb73a9f14so620252b3a.2 for ; Tue, 06 Aug 2024 11:00:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1722967255; x=1723572055; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=BG2lYAKh85KCdrI25BajB3M4AUpp0fE5LFzOfkLW8j0=; b=bcXFh1kYZhyOsEi0O6iT98XMRlXxup1mielkHKioHU+gT0lfc4iN4UPDhZkeKFw38u XDxdwSPXWmdo6nlXFmzMA/QRXS/DXZCos2mz0hd0S+TS4hLoTS60yAKqP1mcpmUhpjsm 9fSqs21PWPln+NWJiCfZ1GEWXvoUbu6l2KdJQi4mn8hj43q6LvioPvLSbXbsSlFa6r0i YVPgod0zQpbnWvoJIL8Oeg9BesknINUjfTFih8pEH8WvGv64AV1pb31iyM1/xRvG+whN sjE3rJddSQmynZjkx/ub29zf7MrzAB3ikygoyk35jiRuilQ2r6PTh1VLbanJAx3Ky13k GCUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722967255; x=1723572055; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=BG2lYAKh85KCdrI25BajB3M4AUpp0fE5LFzOfkLW8j0=; b=r0jOcZjcAxYIQkkk1RUAhah3cPH7H2HSzOBGjEyiNvNzcRRarx/YmBXG22m8k1EOe+ 71+4oyz71xNHcO4YWb4Ra/5eX36mbT9/bIeoVjK+IxjbqUSQzlSihw9XNjufbn/Fcikc 6xXs3jSU1z7bapSo9yYOfbdNB4V1SK/xkvXDmP0eXR0ms99L1UsXBEJeNxPlNUPt1f7U FK4IKcQv5+bIukZb5WBJMGmHKxX3RonQKE2e4dplx+xoU90ug4uN9eLnCGQrbmc0cuyy UmNqjh+VLI30rLa02t1tQBBo/XwK0vZku3BW1o8S9yXHLuHstfmL6q0QRVMEJNWGfApc mpSw== X-Gm-Message-State: AOJu0Yz6gcg7J4wkQHZqtDo81KoUuGCRj73OxTPriEmUh+D5D43I/ydn FGCTC9aiEhJvM0S08Lo+kieHllVLqgvUIyr/WXM9Uis8DwotyISK X-Google-Smtp-Source: AGHT+IGa4ey5YBbJxQ11TeMRhyyzZgNKNcY9Vh8cfMO9qt0PlAVpWq5NwfhORAgtw8f+Nm62nvH1xw== X-Received: by 2002:a05:6a21:4603:b0:1c3:ff33:2471 with SMTP id adf61e73a8af0-1c699579845mr22413161637.8.1722967254548; Tue, 06 Aug 2024 11:00:54 -0700 (PDT) Received: from localhost ([216.228.127.131]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7b830f296d4sm5109153a12.68.2024.08.06.11.00.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Aug 2024 11:00:53 -0700 (PDT) Date: Tue, 6 Aug 2024 11:00:51 -0700 From: Yury Norov To: Valentin Schneider Cc: linux-kernel@vger.kernel.org, Christophe JAILLET , Leonardo Bras , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman Subject: Re: [PATCH 2/2] sched/topology: optimize topology_span_sane() Message-ID: References: <20240802175750.1152788-1-yury.norov@gmail.com> <20240802175750.1152788-3-yury.norov@gmail.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: On Tue, Aug 06, 2024 at 05:50:23PM +0200, Valentin Schneider wrote: > On 02/08/24 10:57, Yury Norov wrote: > > The function may call cpumask_equal with tl->mask(cpu) == tl->mask(i), > > even when cpu != i. > > For which architecture have you observed this? AFAIA all implementations of > tl->sched_domain_mask_f are built on a per-CPU cpumask. x86_64, qemu emulating 16 CPUs in 4 nodes, Linux 6.10, approximately defconfig.