1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include "umem_base.h" 30*0Sstevel@tonic-gate #include "vmem_base.h" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <signal.h> 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate /* 35*0Sstevel@tonic-gate * we use the _ version, since we don't want to be cancelled. 36*0Sstevel@tonic-gate */ 37*0Sstevel@tonic-gate extern int _cond_timedwait(cond_t *cv, mutex_t *mutex, const timespec_t *delay); 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate /*ARGSUSED*/ 40*0Sstevel@tonic-gate static void * 41*0Sstevel@tonic-gate umem_update_thread(void *arg) 42*0Sstevel@tonic-gate { 43*0Sstevel@tonic-gate struct timeval now; 44*0Sstevel@tonic-gate int in_update = 0; 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate (void) mutex_lock(&umem_update_lock); 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate ASSERT(umem_update_thr == thr_self()); 49*0Sstevel@tonic-gate ASSERT(umem_st_update_thr == 0); 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate for (;;) { 52*0Sstevel@tonic-gate umem_process_updates(); 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate if (in_update) { 55*0Sstevel@tonic-gate in_update = 0; 56*0Sstevel@tonic-gate /* 57*0Sstevel@tonic-gate * we wait until now to set the next update time 58*0Sstevel@tonic-gate * so that the updates are self-throttling 59*0Sstevel@tonic-gate */ 60*0Sstevel@tonic-gate (void) gettimeofday(&umem_update_next, NULL); 61*0Sstevel@tonic-gate umem_update_next.tv_sec += umem_reap_interval; 62*0Sstevel@tonic-gate } 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate switch (umem_reaping) { 65*0Sstevel@tonic-gate case UMEM_REAP_DONE: 66*0Sstevel@tonic-gate case UMEM_REAP_ADDING: 67*0Sstevel@tonic-gate break; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate case UMEM_REAP_ACTIVE: 70*0Sstevel@tonic-gate umem_reap_next = gethrtime() + 71*0Sstevel@tonic-gate (hrtime_t)umem_reap_interval * NANOSEC; 72*0Sstevel@tonic-gate umem_reaping = UMEM_REAP_DONE; 73*0Sstevel@tonic-gate break; 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate default: 76*0Sstevel@tonic-gate ASSERT(umem_reaping == UMEM_REAP_DONE || 77*0Sstevel@tonic-gate umem_reaping == UMEM_REAP_ADDING || 78*0Sstevel@tonic-gate umem_reaping == UMEM_REAP_ACTIVE); 79*0Sstevel@tonic-gate break; 80*0Sstevel@tonic-gate } 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate (void) gettimeofday(&now, NULL); 83*0Sstevel@tonic-gate if (now.tv_sec > umem_update_next.tv_sec || 84*0Sstevel@tonic-gate (now.tv_sec == umem_update_next.tv_sec && 85*0Sstevel@tonic-gate now.tv_usec >= umem_update_next.tv_usec)) { 86*0Sstevel@tonic-gate /* 87*0Sstevel@tonic-gate * Time to run an update 88*0Sstevel@tonic-gate */ 89*0Sstevel@tonic-gate (void) mutex_unlock(&umem_update_lock); 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate vmem_update(NULL); 92*0Sstevel@tonic-gate /* 93*0Sstevel@tonic-gate * umem_cache_update can use umem_add_update to 94*0Sstevel@tonic-gate * request further work. The update is not complete 95*0Sstevel@tonic-gate * until all such work is finished. 96*0Sstevel@tonic-gate */ 97*0Sstevel@tonic-gate umem_cache_applyall(umem_cache_update); 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate (void) mutex_lock(&umem_update_lock); 100*0Sstevel@tonic-gate in_update = 1; 101*0Sstevel@tonic-gate continue; /* start processing immediately */ 102*0Sstevel@tonic-gate } 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate /* 105*0Sstevel@tonic-gate * if there is no work to do, we wait until it is time for 106*0Sstevel@tonic-gate * next update, or someone wakes us. 107*0Sstevel@tonic-gate */ 108*0Sstevel@tonic-gate if (umem_null_cache.cache_unext == &umem_null_cache) { 109*0Sstevel@tonic-gate timespec_t abs_time; 110*0Sstevel@tonic-gate abs_time.tv_sec = umem_update_next.tv_sec; 111*0Sstevel@tonic-gate abs_time.tv_nsec = umem_update_next.tv_usec * 1000; 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate (void) _cond_timedwait(&umem_update_cv, 114*0Sstevel@tonic-gate &umem_update_lock, &abs_time); 115*0Sstevel@tonic-gate } 116*0Sstevel@tonic-gate } 117*0Sstevel@tonic-gate /* LINTED no return statement */ 118*0Sstevel@tonic-gate } 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate int 121*0Sstevel@tonic-gate umem_create_update_thread(void) 122*0Sstevel@tonic-gate { 123*0Sstevel@tonic-gate sigset_t sigmask, oldmask; 124*0Sstevel@tonic-gate 125*0Sstevel@tonic-gate ASSERT(MUTEX_HELD(&umem_update_lock)); 126*0Sstevel@tonic-gate ASSERT(umem_update_thr == 0); 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate /* 129*0Sstevel@tonic-gate * The update thread handles no signals 130*0Sstevel@tonic-gate */ 131*0Sstevel@tonic-gate (void) sigfillset(&sigmask); 132*0Sstevel@tonic-gate (void) thr_sigsetmask(SIG_BLOCK, &sigmask, &oldmask); 133*0Sstevel@tonic-gate if (thr_create(NULL, NULL, umem_update_thread, NULL, 134*0Sstevel@tonic-gate THR_BOUND | THR_DAEMON | THR_DETACHED, &umem_update_thr) == 0) { 135*0Sstevel@tonic-gate (void) thr_sigsetmask(SIG_SETMASK, &oldmask, NULL); 136*0Sstevel@tonic-gate return (1); 137*0Sstevel@tonic-gate } 138*0Sstevel@tonic-gate umem_update_thr = 0; 139*0Sstevel@tonic-gate (void) thr_sigsetmask(SIG_SETMASK, &oldmask, NULL); 140*0Sstevel@tonic-gate return (0); 141*0Sstevel@tonic-gate } 142