From owner-svn-src-all@FreeBSD.ORG Tue May 17 22:14:01 2011 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6BD39106566B; Tue, 17 May 2011 22:14:01 +0000 (UTC) (envelope-from attilio@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 3FFC48FC15; Tue, 17 May 2011 22:14:01 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id p4HME1JQ049186; Tue, 17 May 2011 22:14:01 GMT (envelope-from attilio@svn.freebsd.org) Received: (from attilio@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id p4HME1DO049184; Tue, 17 May 2011 22:14:01 GMT (envelope-from attilio@svn.freebsd.org) Message-Id: <201105172214.p4HME1DO049184@svn.freebsd.org> From: Attilio Rao Date: Tue, 17 May 2011 22:14:01 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r222040 - head/sys/kern X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 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: Tue, 17 May 2011 22:14:01 -0000 Author: attilio Date: Tue May 17 22:14:00 2011 New Revision: 222040 URL: http://svn.freebsd.org/changeset/base/222040 Log: Merge r221285 from largeSMP project: - Remove the following sysctl: kern.sched.ipiwakeup.onecpu kern.sched.ipiwakeup.htt2 Because they are absolutely obsolete. Probabilly the whole wakeup forward mechanism should be revisited for a better fitting in modern hw, in the future. - As map2 variable is no longer used rename map3 to map2 - Fix a string by making more informative the msg and removing the arguments passing. Reviewed by: julian Tested by: several Modified: head/sys/kern/sched_4bsd.c Modified: head/sys/kern/sched_4bsd.c ============================================================================== --- head/sys/kern/sched_4bsd.c Tue May 17 22:07:45 2011 (r222039) +++ head/sys/kern/sched_4bsd.c Tue May 17 22:14:00 2011 (r222040) @@ -235,16 +235,6 @@ SYSCTL_INT(_kern_sched_ipiwakeup, OID_AU &forward_wakeup_use_loop, 0, "Use a loop to find idle cpus"); -static int forward_wakeup_use_single = 0; -SYSCTL_INT(_kern_sched_ipiwakeup, OID_AUTO, onecpu, CTLFLAG_RW, - &forward_wakeup_use_single, 0, - "Only signal one idle cpu"); - -static int forward_wakeup_use_htt = 0; -SYSCTL_INT(_kern_sched_ipiwakeup, OID_AUTO, htt2, CTLFLAG_RW, - &forward_wakeup_use_htt, 0, - "account for htt"); - #endif #if 0 static int sched_followon = 0; @@ -1064,7 +1054,7 @@ static int forward_wakeup(int cpunum) { struct pcpu *pc; - cpumask_t dontuse, id, map, map2, map3, me; + cpumask_t dontuse, id, map, map2, me; mtx_assert(&sched_lock, MA_OWNED); @@ -1089,13 +1079,13 @@ forward_wakeup(int cpunum) return (0); dontuse = me | stopped_cpus | hlt_cpus_mask; - map3 = 0; + map2 = 0; if (forward_wakeup_use_loop) { SLIST_FOREACH(pc, &cpuhead, pc_allcpu) { id = pc->pc_cpumask; if ((id & dontuse) == 0 && pc->pc_curthread == pc->pc_idlethread) { - map3 |= id; + map2 |= id; } } } @@ -1106,33 +1096,19 @@ forward_wakeup(int cpunum) /* If they are both on, compare and use loop if different. */ if (forward_wakeup_use_loop) { - if (map != map3) { - printf("map (%02X) != map3 (%02X)\n", map, - map3); - map = map3; + if (map != map2) { + printf("map != map2, loop method preferred\n"); + map = map2; } } } else { - map = map3; + map = map2; } /* If we only allow a specific CPU, then mask off all the others. */ if (cpunum != NOCPU) { KASSERT((cpunum <= mp_maxcpus),("forward_wakeup: bad cpunum.")); map &= (1 << cpunum); - } else { - /* Try choose an idle die. */ - if (forward_wakeup_use_htt) { - map2 = (map & (map >> 1)) & 0x5555; - if (map2) { - map = map2; - } - } - - /* Set only one bit. */ - if (forward_wakeup_use_single) { - map = map & ((~map) + 1); - } } if (map) { forward_wakeups_delivered++;