From owner-svn-src-head@FreeBSD.ORG Mon Feb 9 19:21:55 2015 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 139A0F7F; Mon, 9 Feb 2015 19:21:55 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id F3F90102; Mon, 9 Feb 2015 19:21:54 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t19JLsLd065468; Mon, 9 Feb 2015 19:21:54 GMT (envelope-from nwhitehorn@FreeBSD.org) Received: (from nwhitehorn@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t19JLs8F065467; Mon, 9 Feb 2015 19:21:54 GMT (envelope-from nwhitehorn@FreeBSD.org) Message-Id: <201502091921.t19JLs8F065467@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: nwhitehorn set sender to nwhitehorn@FreeBSD.org using -f From: Nathan Whitehorn Date: Mon, 9 Feb 2015 19:21:54 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r278471 - head/sys/powerpc/pseries X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Feb 2015 19:21:55 -0000 Author: nwhitehorn Date: Mon Feb 9 19:21:54 2015 New Revision: 278471 URL: https://svnweb.freebsd.org/changeset/base/278471 Log: Distribute interrupts across multiple CPUs in SMP configurations instead of sending them all to CPU 0. Modified: head/sys/powerpc/pseries/xics.c Modified: head/sys/powerpc/pseries/xics.c ============================================================================== --- head/sys/powerpc/pseries/xics.c Mon Feb 9 19:20:59 2015 (r278470) +++ head/sys/powerpc/pseries/xics.c Mon Feb 9 19:21:54 2015 (r278471) @@ -197,13 +197,25 @@ xicp_bind(device_t dev, u_int irq, cpuse { struct xicp_softc *sc = device_get_softc(dev); cell_t status, cpu; + int ncpus, i; /* - * This doesn't appear to actually support affinity groups, so just - * use the first CPU. + * This doesn't appear to actually support affinity groups, so pick a + * random CPU. */ CPU_FOREACH(cpu) - if (CPU_ISSET(cpu, &cpumask)) break; + if (CPU_ISSET(cpu, &cpumask)) ncpus++; + + i = mftb() % ncpus; + ncpus = 0; + CPU_FOREACH(cpu) { + if (!CPU_ISSET(cpu, &cpumask)) + continue; + if (ncpus == i) + break; + ncpus++; + } + rtas_call_method(sc->ibm_set_xive, 3, 1, irq, cpu, XICP_PRIORITY, &status);