Date: Mon, 26 Jun 2006 01:39:16 GMT From: Kip Macy <kmacy@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 100007 for review Message-ID: <200606260139.k5Q1dG3X094359@repoman.freebsd.org>
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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);
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