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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #ifndef	_SYS_CPUCAPS_IMPL_H
     28 #define	_SYS_CPUCAPS_IMPL_H
     29 
     30 #pragma ident	"@(#)cpucaps_impl.h	1.1	07/03/06 SMI"
     31 
     32 #ifdef	__cplusplus
     33 extern "C" {
     34 #endif
     35 
     36 #ifdef _KERNEL
     37 
     38 #include <sys/kstat.h>
     39 #include <sys/cpucaps.h>
     40 #include <sys/list.h>
     41 #include <sys/time.h>
     42 #include <sys/waitq.h>
     43 
     44 /*
     45  * When resource control framework sets the cap to NOCAP value the cap
     46  * is disabled.
     47  */
     48 #define	NOCAP	MAXCAP
     49 
     50 /*
     51  * Maximum value for the cap usage. Should be the maximum value for hrtime_t
     52  */
     53 #if defined(_LP64)
     54 #define	MAX_USAGE LONG_MAX
     55 #else
     56 #define	MAX_USAGE 9223372036854775807LL
     57 #endif
     58 
     59 
     60 /*
     61  * Most of the per-project or per-zone state related to CPU caps is kept in the
     62  * cpucap_t structure.
     63  */
     64 typedef struct cpucap {
     65 	list_node_t	cap_link;	/* next/prev capped entity	*/
     66 	struct kproject	*cap_project;	/* project for the cap		*/
     67 	struct zone	*cap_zone;	/* zone for the cap		*/
     68 	waitq_t		cap_waitq;	/* waitq for capped threads	*/
     69 	kstat_t		*cap_kstat;	/* cpucaps specific kstat	*/
     70 	int64_t		cap_lbolt;	/* zone cap specific 		*/
     71 	hrtime_t	cap_value;	/* scaled CPU usage cap		*/
     72 	hrtime_t	cap_usage;	/* current CPU usage		*/
     73 	disp_lock_t	cap_usagelock;	/* protects cap_usage above	*/
     74 	/*
     75 	 * Per cap statistics.
     76 	 */
     77 	hrtime_t	cap_maxusage;	/* maximum cap usage		*/
     78 	u_longlong_t	cap_below;	/* # of ticks spend below the cap */
     79 	u_longlong_t	cap_above;	/* # of ticks spend above the cap */
     80 } cpucap_t;
     81 
     82 /*
     83  * Wrapper macros for checking cap state.
     84  */
     85 #define	CAP_ENABLED(cap) ((cap)->cap_value != 0)
     86 #define	CAP_DISABLED(cap) (!CAP_ENABLED(cap))
     87 
     88 #define	PROJECT_IS_CAPPED(project) \
     89 	(((project)->kpj_cpucap != NULL) && \
     90 	CAP_ENABLED((project)->kpj_cpucap))
     91 
     92 #define	ZONE_IS_CAPPED(zone) \
     93 	(((zone)->zone_cpucap != NULL) && \
     94 	CAP_ENABLED((zone)->zone_cpucap))
     95 
     96 #endif	/* _KERNEL */
     97 
     98 #ifdef	__cplusplus
     99 }
    100 #endif
    101 
    102 #endif	/* _SYS_CPUCAPS_IMPL_H */
    103