From patchwork Thu Dec 8 18:31:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yury Norov X-Patchwork-Id: 13068667 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56197C10F1B for ; Thu, 8 Dec 2022 18:31:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229592AbiLHSb3 (ORCPT ); Thu, 8 Dec 2022 13:31:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229840AbiLHSbO (ORCPT ); Thu, 8 Dec 2022 13:31:14 -0500 Received: from mail-oa1-x2d.google.com (mail-oa1-x2d.google.com [IPv6:2001:4860:4864:20::2d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE2D6AE4CA; Thu, 8 Dec 2022 10:31:12 -0800 (PST) Received: by mail-oa1-x2d.google.com with SMTP id 586e51a60fabf-14455716674so2807284fac.7; Thu, 08 Dec 2022 10:31:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=d0/IgShbjb7qZAYWczuxoDmDyDdccuNPQ9P2AVi15HY=; b=lOxPMsbFDjwHG7HHR/orp+Pa1RS39Ze8na4rbdhPw189WP/MM4eBBehW1SZExmZPxq tiJirumWDNQOl3hPWfZpEdC3kT/L0/8Iw3MPpHUq36+mlsJIJ3NErF0CyEoEk24teAvb jv8iIoRKaccmPycGlitSJg/uRywRLWiunQxdbZNNXpBEWYpcieBXXwn8Sc/mwlKRGSzx 8wZo5ds/TIytpQjbzsy5F2LPl0IQFPVHI73htiuJVtdt5VQT1ZP2shA9/xBeLI67XWSt 19tRLmVoMARQt7scuWD50mPic1sJvH3poXZ9vPehyb0eRK+UXa0cZyII2ssgPYKNiwVG nNKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=d0/IgShbjb7qZAYWczuxoDmDyDdccuNPQ9P2AVi15HY=; b=KvNdyOpxI2fnsWBIpd2tUzLilvh8efd9M47MLT0A0YBdFcGPKHVTzyaNkGCxtB6j73 NB2P/WR350FJI002dV3+uGPLBaLF2zwq5xKYrt7VdtzJ9EyzGyx8whdXFMbyjvnmAPa9 ZLmAhHZLwv8XfxO40cJ/HlPGD4H7Ggdo1gnyGP6Gb05dAjSfipW19AOxiTHg26NIauQU MEHqvFAHUiJkobCC7H9MTYE3V92czGhfP4/RKRKM7/sqREh05tXSe5OuiXObS7E9YW+y tJVXIQJMWMBODC4X2erNQlKhP6V8SJyUmN2Y8NC1ILvaxluErgk0HSKtOwBTpozBYKv2 ZCow== X-Gm-Message-State: ANoB5pnAG1L2fFX5vJVkjxfPmwYIPPPtF8bxhE+neFJWSFnFazezmOUz L3CtvSg7Sgy0h3A/cbdra+KfalIcY+s= X-Google-Smtp-Source: AA0mqf5isVkvLJVjOx5VBCgzSb+tYVQchORCS9bPkl13W6aETbe07HI49CIJpRycmeydxnnPPM4t5g== X-Received: by 2002:a05:6871:4683:b0:137:3ada:7249 with SMTP id ni3-20020a056871468300b001373ada7249mr1586685oab.54.1670524271939; Thu, 08 Dec 2022 10:31:11 -0800 (PST) Received: from localhost ([12.97.180.36]) by smtp.gmail.com with ESMTPSA id m24-20020a056870a11800b001447d74a58esm8451783oae.8.2022.12.08.10.31.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Dec 2022 10:31:11 -0800 (PST) From: Yury Norov To: linux-kernel@vger.kernel.org, "David S. Miller" , Andy Shevchenko , Barry Song , Ben Segall , haniel Bristot de Oliveira , Dietmar Eggemann , Gal Pressman , Greg Kroah-Hartman , Heiko Carstens , Ingo Molnar , Jakub Kicinski , Jason Gunthorpe , Jesse Brandeburg , Jonathan Cameron , Juri Lelli , Leon Romanovsky , Mel Gorman , Peter Zijlstra , Rasmus Villemoes , Saeed Mahameed , Steven Rostedt , Tariq Toukan , Tariq Toukan , Tony Luck , Valentin Schneider , Vincent Guittot Cc: Yury Norov , linux-crypto@vger.kernel.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org Subject: [PATCH v3 4/5] cpumask: improve on cpumask_local_spread() locality Date: Thu, 8 Dec 2022 10:31:00 -0800 Message-Id: <20221208183101.1162006-5-yury.norov@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221208183101.1162006-1-yury.norov@gmail.com> References: <20221208183101.1162006-1-yury.norov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Switch cpumask_local_spread() to use newly added sched_numa_find_nth_cpu(), which takes into account distances to each node in the system. For the following NUMA configuration: root@debian:~# numactl -H available: 4 nodes (0-3) node 0 cpus: 0 1 2 3 node 0 size: 3869 MB node 0 free: 3740 MB node 1 cpus: 4 5 node 1 size: 1969 MB node 1 free: 1937 MB node 2 cpus: 6 7 node 2 size: 1967 MB node 2 free: 1873 MB node 3 cpus: 8 9 10 11 12 13 14 15 node 3 size: 7842 MB node 3 free: 7723 MB node distances: node 0 1 2 3 0: 10 50 30 70 1: 50 10 70 30 2: 30 70 10 50 3: 70 30 50 10 The new cpumask_local_spread() traverses cpus for each node like this: node 0: 0 1 2 3 6 7 4 5 8 9 10 11 12 13 14 15 node 1: 4 5 8 9 10 11 12 13 14 15 0 1 2 3 6 7 node 2: 6 7 0 1 2 3 8 9 10 11 12 13 14 15 4 5 node 3: 8 9 10 11 12 13 14 15 4 5 6 7 0 1 2 3 Signed-off-by: Yury Norov --- lib/cpumask.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/lib/cpumask.c b/lib/cpumask.c index c7c392514fd3..255974cd6734 100644 --- a/lib/cpumask.c +++ b/lib/cpumask.c @@ -110,7 +110,7 @@ void __init free_bootmem_cpumask_var(cpumask_var_t mask) #endif /** - * cpumask_local_spread - select the i'th cpu with local numa cpu's first + * cpumask_local_spread - select the i'th cpu based on NUMA distances * @i: index number * @node: local numa_node * @@ -132,15 +132,7 @@ unsigned int cpumask_local_spread(unsigned int i, int node) if (cpu < nr_cpu_ids) return cpu; } else { - /* NUMA first. */ - cpu = cpumask_nth_and(i, cpu_online_mask, cpumask_of_node(node)); - if (cpu < nr_cpu_ids) - return cpu; - - i -= cpumask_weight_and(cpu_online_mask, cpumask_of_node(node)); - - /* Skip NUMA nodes, done above. */ - cpu = cpumask_nth_andnot(i, cpu_online_mask, cpumask_of_node(node)); + cpu = sched_numa_find_nth_cpu(cpu_online_mask, i, node); if (cpu < nr_cpu_ids) return cpu; }