/* * 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 */
