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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 2009 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 #ifdef	__cplusplus
     31 extern "C" {
     32 #endif
     33 
     34 #ifdef _KERNEL
     35 
     36 #include <sys/kstat.h>
     37 #include <sys/cpucaps.h>
     38 #include <sys/list.h>
     39 #include <sys/time.h>
     40 #include <sys/waitq.h>
     41 
     42 /*
     43  * When resource control framework sets the cap to NOCAP value the cap
     44  * is disabled.
     45  */
     46 #define	NOCAP	MAXCAP
     47 
     48 /*
     49  * Maximum value for the cap usage. Should be the maximum value for hrtime_t
     50  */
     51 #if defined(_LP64)
     52 #define	MAX_USAGE LONG_MAX
     53 #else
     54 #define	MAX_USAGE 9223372036854775807LL
     55 #endif
     56 
     57 
     58 /*
     59  * Most of the per-project or per-zone state related to CPU caps is kept in the
     60  * cpucap_t structure.
     61  */
     62 typedef struct cpucap {
     63 	list_node_t	cap_link;	/* next/prev capped entity	*/
     64 	struct kproject	*cap_project;	/* project for the cap		*/
     65 	struct zone	*cap_zone;	/* zone for the cap		*/
     66 	waitq_t		cap_waitq;	/* waitq for capped threads	*/
     67 	kstat_t		*cap_kstat;	/* cpucaps specific kstat	*/
     68 	int64_t		cap_gen;	/* zone cap specific 		*/
     69 	hrtime_t	cap_value;	/* scaled CPU usage cap		*/
     70 	hrtime_t	cap_usage;	/* current CPU usage		*/
     71 	disp_lock_t	cap_usagelock;	/* protects cap_usage above	*/
     72 	/*
     73 	 * Per cap statistics.
     74 	 */
     75 	hrtime_t	cap_maxusage;	/* maximum cap usage		*/
     76 	u_longlong_t	cap_below;	/* # of ticks spend below the cap */
     77 	u_longlong_t	cap_above;	/* # of ticks spend above the cap */
     78 } cpucap_t;
     79 
     80 /*
     81  * Wrapper macros for checking cap state.
     82  */
     83 #define	CAP_ENABLED(cap) ((cap)->cap_value != 0)
     84 #define	CAP_DISABLED(cap) (!CAP_ENABLED(cap))
     85 
     86 #define	PROJECT_IS_CAPPED(project) \
     87 	(((project)->kpj_cpucap != NULL) && \
     88 	CAP_ENABLED((project)->kpj_cpucap))
     89 
     90 #define	ZONE_IS_CAPPED(zone) \
     91 	(((zone)->zone_cpucap != NULL) && \
     92 	CAP_ENABLED((zone)->zone_cpucap))
     93 
     94 #endif	/* _KERNEL */
     95 
     96 #ifdef	__cplusplus
     97 }
     98 #endif
     99 
    100 #endif	/* _SYS_CPUCAPS_IMPL_H */
    101