From owner-svn-src-all@freebsd.org Wed Nov 18 19:55:24 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 9F889470CFF; Wed, 18 Nov 2020 19:55:24 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Cbtp4494Zz4ZpV; Wed, 18 Nov 2020 19:55:24 +0000 (UTC) (envelope-from dim@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 7D70E1774A; Wed, 18 Nov 2020 19:55:24 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 0AIJtOg9009807; Wed, 18 Nov 2020 19:55:24 GMT (envelope-from dim@FreeBSD.org) Received: (from dim@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 0AIJtOtV009806; Wed, 18 Nov 2020 19:55:24 GMT (envelope-from dim@FreeBSD.org) Message-Id: <202011181955.0AIJtOtV009806@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: dim set sender to dim@FreeBSD.org using -f From: Dimitry Andric Date: Wed, 18 Nov 2020 19:55:24 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r367815 - head/contrib/llvm-project/llvm/lib/Support/Unix X-SVN-Group: head X-SVN-Commit-Author: dim X-SVN-Commit-Paths: head/contrib/llvm-project/llvm/lib/Support/Unix X-SVN-Commit-Revision: 367815 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: 2.1.34 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: Wed, 18 Nov 2020 19:55:24 -0000 Author: dim Date: Wed Nov 18 19:55:24 2020 New Revision: 367815 URL: https://svnweb.freebsd.org/changeset/base/367815 Log: For llvm's internal function which retrieves the number of available "hardware threads", use cpuset_getaffinity(2) on FreeBSD, so it will honor processor sets configured by the cpuset(1) command. This should make it possible to avoid e.g. lld creating a huge number of threads on a machine with many cores, even for linking simple programs. This will also be submitted upstream. Submitted by: mjg MFC after: 1 week Modified: head/contrib/llvm-project/llvm/lib/Support/Unix/Threading.inc Modified: head/contrib/llvm-project/llvm/lib/Support/Unix/Threading.inc ============================================================================== --- head/contrib/llvm-project/llvm/lib/Support/Unix/Threading.inc Wed Nov 18 19:47:24 2020 (r367814) +++ head/contrib/llvm-project/llvm/lib/Support/Unix/Threading.inc Wed Nov 18 19:55:24 2020 (r367815) @@ -26,6 +26,10 @@ #include // For pthread_getthreadid_np() / pthread_set_name_np() #endif +#if defined(__FreeBSD__) +#include +#endif + #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) #include #include @@ -282,6 +286,13 @@ SetThreadPriorityResult llvm::set_thread_priority(Thre #include int computeHostNumHardwareThreads() { +#ifdef __FreeBSD__ + cpuset_t mask; + CPU_ZERO(&mask); + if (cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(mask), + &mask) == 0) + return CPU_COUNT(&mask); +#endif #ifdef __linux__ cpu_set_t Set; if (sched_getaffinity(0, sizeof(Set), &Set) == 0)