From owner-p4-projects@FreeBSD.ORG  Mon Jun 26 03:10:15 2006
Return-Path: <owner-p4-projects@FreeBSD.ORG>
X-Original-To: p4-projects@freebsd.org
Delivered-To: p4-projects@freebsd.org
Received: by hub.freebsd.org (Postfix, from userid 32767)
	id 397B416A405; Mon, 26 Jun 2006 03:10:13 +0000 (UTC)
X-Original-To: perforce@freebsd.org
Delivered-To: perforce@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 1955C16A400
	for <perforce@freebsd.org>; Mon, 26 Jun 2006 03:10:12 +0000 (UTC)
	(envelope-from kmacy@freebsd.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 8EC2B4454B
	for <perforce@freebsd.org>; Mon, 26 Jun 2006 01:39:16 +0000 (GMT)
	(envelope-from kmacy@freebsd.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.6/8.13.6) with ESMTP id k5Q1dGhf094362
	for <perforce@freebsd.org>; Mon, 26 Jun 2006 01:39:16 GMT
	(envelope-from kmacy@freebsd.org)
Received: (from perforce@localhost)
	by repoman.freebsd.org (8.13.6/8.13.4/Submit) id k5Q1dG3X094359
	for perforce@freebsd.org; Mon, 26 Jun 2006 01:39:16 GMT
	(envelope-from kmacy@freebsd.org)
Date: Mon, 26 Jun 2006 01:39:16 GMT
Message-Id: <200606260139.k5Q1dG3X094359@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: perforce set sender to
	kmacy@freebsd.org using -f
From: Kip Macy <kmacy@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Cc: 
Subject: PERFORCE change 100007 for review
X-BeenThere: p4-projects@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: p4 projects tree changes <p4-projects.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/p4-projects>
List-Post: <mailto:p4-projects@freebsd.org>
List-Help: <mailto:p4-projects-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 26 Jun 2006 03:10:15 -0000

http://perforce.freebsd.org/chv.cgi?CH=100007

Change 100007 by kmacy@kmacy_storage:sun4v_work_sleepq on 2006/06/26 01:38:33

	tune interval at which we poll choosethread

Affected files ...

.. //depot/projects/kmacy_sun4v/src/sys/kern/kern_idle.c#8 edit

Differences ...

==== //depot/projects/kmacy_sun4v/src/sys/kern/kern_idle.c#8 (text+ko) ====

@@ -35,6 +35,7 @@
 #include <sys/proc.h>
 #include <sys/resourcevar.h>
 #include <sys/sched.h>
+#include <sys/sysctl.h>
 #include <sys/unistd.h>
 #include <sys/ktr.h>
 #ifdef SMP
@@ -45,6 +46,12 @@
 SYSINIT(idle_setup, SI_SUB_SCHED_IDLE, SI_ORDER_FIRST, idle_setup, NULL)
 
 static void idle_proc(void *dummy);
+static int interval = 10;
+
+SYSCTL_NODE(_debug, OID_AUTO, scheduler, CTLFLAG_RD, NULL, "scheduler debugging");
+SYSCTL_NODE(_debug_scheduler, OID_AUTO, idle, CTLFLAG_RD, NULL, "idle info");
+SYSCTL_INT(_debug_scheduler_idle, OID_AUTO, interval, CTLFLAG_RW,
+	   &interval, 0, "interval between idle skips");
 
 /*
  * Set up per-cpu idle process contexts.  The AP's shouldn't be running or
@@ -95,20 +102,18 @@
 static void
 idle_proc(void *dummy)
 {
-	int i;
 #ifdef SMP
 	cpumask_t mycpu;
 #endif
-
+	int i = 0;
 #ifdef SMP
 	mycpu = PCPU_GET(cpumask);
 	atomic_set_int(&idle_cpus_mask, mycpu);
 #endif
-	i = 0;
 	for (;;) {
 		mtx_assert(&Giant, MA_NOTOWNED);
 
-		while (sched_runnable() == 0 && (i++%10 != 0))
+		while (sched_runnable() == 0 && (i++%interval != 0))
 			cpu_idle();
 #ifdef SMP
 		atomic_clear_int(&idle_cpus_mask, mycpu);