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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_SYSDC_IMPL_H
#define _SYS_SYSDC_IMPL_H
#include <sys/types.h>
#include <sys/time.h>
#include <sys/list.h>
#include <sys/sysdc.h>
#ifdef __cplusplus
extern "C" {
#endif
struct _kthread;
struct cpupart;
/*
* Tracks per-processor-set information for SDC. Its main use is to
* implement per-processor-set breaks.
*/
typedef struct sysdc_pset {
list_node_t sdp_node; /* node on sysdc_psets list */
struct cpupart *sdp_cpupart; /* associated cpu partition */
size_t sdp_nthreads; /* reference count */
/* The remainder is only touched by sysdc_update() */
hrtime_t sdp_onproc_time; /* time onproc at last update */
boolean_t sdp_need_break; /* threads forced to minpri */
uint_t sdp_should_break; /* # updates need_break is set */
uint_t sdp_dont_break; /* after break, # updates until next */
/* debugging fields */
uint_t sdp_onproc_threads;
hrtime_t sdp_vtime_last_interval;
uint_t sdp_DC_last_interval;
} sysdc_pset_t;
/*
* Per-thread information, pointed to by t_cldata.
*/
typedef struct sysdc {
uint_t sdc_target_DC; /* target duty cycle */
uint_t sdc_minpri; /* our minimum priority */
uint_t sdc_maxpri; /* our maximum priority */
sysdc_pset_t *sdc_pset; /* the processor set bound to */
/* protected by sdl_lock */
struct _kthread *sdc_thread; /* back-pointer, or NULL if freeable */
/* protected by arrangement between thread and sysdc_update() */
struct sysdc *sdc_next; /* next in hash table, NULL if not in */
/* protected by thread_lock() */
uint_t sdc_nupdates; /* number of sysdc_update_times() */
hrtime_t sdc_base_O; /* on-cpu time at last reset */
hrtime_t sdc_base_R; /* runnable time at last reset */
uint_t sdc_sleep_updates; /* 0, or nupdates when we slept */
clock_t sdc_ticks; /* sdc_tick() calls */
clock_t sdc_update_ticks; /* value of ticks for forced update */
clock_t sdc_pri_check; /* lbolt when we checked our priority */
hrtime_t sdc_last_base_O; /* onproc time at sysdc_update() */
uint_t sdc_pri; /* our last computed priority */
uint_t sdc_epri; /* our actual thread priority */
/* for debugging only */
clock_t sdc_reset; /* lbolt when we reset our bases */
hrtime_t sdc_cur_O; /* on-cpu time at last prio check */
hrtime_t sdc_cur_R; /* runnable time at last prio check */
hrtime_t sdc_last_O; /* onproc time at thread update */
uint_t sdc_cur_DC; /* our actual duty cycle at last chk */
} sysdc_t;
/*
* Hash bucket of active SDC threads.
*/
typedef struct sysdc_list {
kmutex_t sdl_lock; /* lock keeping threads from exiting */
sysdc_t *volatile sdl_list; /* list of active threads in bucket */
char sdl_pad[64 - sizeof (kmutex_t) - sizeof (sysdc_t *)];
} sysdc_list_t;
/*
* Args to CL_ENTERCLASS().
*/
typedef struct sysdc_params {
uint_t sdp_minpri;
uint_t sdp_maxpri;
uint_t sdp_DC;
} sysdc_params_t;
/*
* Duty cycles are percentages in the range [1,100].
*/
#define SYSDC_DC_MAX 100u /* 1 <= DC <= DC_MAX */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SYSDC_IMPL_H */
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