From owner-svn-src-all@freebsd.org Thu Mar 22 19:06:51 2018 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 47997F61DA6; Thu, 22 Mar 2018 19:06:51 +0000 (UTC) (envelope-from jeff@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id EA8C2859EA; Thu, 22 Mar 2018 19:06:50 +0000 (UTC) (envelope-from jeff@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id E57201545C; Thu, 22 Mar 2018 19:06:50 +0000 (UTC) (envelope-from jeff@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w2MJ6oJo052899; Thu, 22 Mar 2018 19:06:50 GMT (envelope-from jeff@FreeBSD.org) Received: (from jeff@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w2MJ6o3v052898; Thu, 22 Mar 2018 19:06:50 GMT (envelope-from jeff@FreeBSD.org) Message-Id: <201803221906.w2MJ6o3v052898@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jeff set sender to jeff@FreeBSD.org using -f From: Jeff Roberson Date: Thu, 22 Mar 2018 19:06:50 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r331367 - head/sys/vm X-SVN-Group: head X-SVN-Commit-Author: jeff X-SVN-Commit-Paths: head/sys/vm X-SVN-Commit-Revision: 331367 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Mar 2018 19:06:51 -0000 Author: jeff Date: Thu Mar 22 19:06:50 2018 New Revision: 331367 URL: https://svnweb.freebsd.org/changeset/base/331367 Log: Use read_mostly and alignment tags to eliminate or limit false sharing. Reviewed by: markj (Part of D14707) Sponsored by: Netflix, Dell/EMC Isilon Modified: head/sys/vm/vm_phys.c Modified: head/sys/vm/vm_phys.c ============================================================================== --- head/sys/vm/vm_phys.c Thu Mar 22 18:58:34 2018 (r331366) +++ head/sys/vm/vm_phys.c Thu Mar 22 19:06:50 2018 (r331367) @@ -73,14 +73,14 @@ _Static_assert(sizeof(long) * NBBY >= VM_PHYSSEG_MAX, "Too many physsegs."); #ifdef NUMA -struct mem_affinity *mem_affinity; -int *mem_locality; +struct mem_affinity __read_mostly *mem_affinity; +int __read_mostly *mem_locality; #endif -int vm_ndomains = 1; +int __read_mostly vm_ndomains = 1; -struct vm_phys_seg vm_phys_segs[VM_PHYSSEG_MAX]; -int vm_phys_nsegs; +struct vm_phys_seg __read_mostly vm_phys_segs[VM_PHYSSEG_MAX]; +int __read_mostly vm_phys_nsegs; struct vm_phys_fictitious_seg; static int vm_phys_fictitious_cmp(struct vm_phys_fictitious_seg *, @@ -100,18 +100,18 @@ struct vm_phys_fictitious_seg { RB_GENERATE_STATIC(fict_tree, vm_phys_fictitious_seg, node, vm_phys_fictitious_cmp); -static struct rwlock vm_phys_fictitious_reg_lock; +static struct rwlock_padalign vm_phys_fictitious_reg_lock; MALLOC_DEFINE(M_FICT_PAGES, "vm_fictitious", "Fictitious VM pages"); -static struct vm_freelist +static struct vm_freelist __aligned(CACHE_LINE_SIZE) vm_phys_free_queues[MAXMEMDOM][VM_NFREELIST][VM_NFREEPOOL][VM_NFREEORDER]; -static int vm_nfreelists; +static int __read_mostly vm_nfreelists; /* * Provides the mapping from VM_FREELIST_* to free list indices (flind). */ -static int vm_freelist_to_flind[VM_NFREELIST]; +static int __read_mostly vm_freelist_to_flind[VM_NFREELIST]; CTASSERT(VM_FREELIST_DEFAULT == 0);