sysdc_impl.h revision 35a5a3587fd94b666239c157d3722745250ccbd7
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * CDDL HEADER START
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35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * Use is subject to license terms.
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * Tracks per-processor-set information for SDC. Its main use is to
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * implement per-processor-set breaks.
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adamstypedef struct sysdc_pset {
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams list_node_t sdp_node; /* node on sysdc_psets list */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams struct cpupart *sdp_cpupart; /* associated cpu partition */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams /* The remainder is only touched by sysdc_update() */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams hrtime_t sdp_onproc_time; /* time onproc at last update */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams boolean_t sdp_need_break; /* threads forced to minpri */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdp_should_break; /* # updates need_break is set */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdp_dont_break; /* after break, # updates until next */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams /* debugging fields */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * Per-thread information, pointed to by t_cldata.
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adamstypedef struct sysdc {
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_target_DC; /* target duty cycle */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_minpri; /* our minimum priority */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_maxpri; /* our maximum priority */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams sysdc_pset_t *sdc_pset; /* the processor set bound to */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams /* protected by sdl_lock */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams struct _kthread *sdc_thread; /* back-pointer, or NULL if freeable */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams /* protected by arrangement between thread and sysdc_update() */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams struct sysdc *sdc_next; /* next in hash table, NULL if not in */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams /* protected by thread_lock() */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_nupdates; /* number of sysdc_update_times() */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams hrtime_t sdc_base_O; /* on-cpu time at last reset */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams hrtime_t sdc_base_R; /* runnable time at last reset */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_sleep_updates; /* 0, or nupdates when we slept */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams clock_t sdc_update_ticks; /* value of ticks for forced update */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams clock_t sdc_pri_check; /* lbolt when we checked our priority */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams hrtime_t sdc_last_base_O; /* onproc time at sysdc_update() */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_pri; /* our last computed priority */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_epri; /* our actual thread priority */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams /* for debugging only */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams clock_t sdc_reset; /* lbolt when we reset our bases */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams hrtime_t sdc_cur_O; /* on-cpu time at last prio check */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams hrtime_t sdc_cur_R; /* runnable time at last prio check */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams hrtime_t sdc_last_O; /* onproc time at thread update */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams uint_t sdc_cur_DC; /* our actual duty cycle at last chk */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * Hash bucket of active SDC threads.
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adamstypedef struct sysdc_list {
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams kmutex_t sdl_lock; /* lock keeping threads from exiting */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams sysdc_t *volatile sdl_list; /* list of active threads in bucket */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams char sdl_pad[64 - sizeof (kmutex_t) - sizeof (sysdc_t *)];
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * Args to CL_ENTERCLASS().
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adamstypedef struct sysdc_params {
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams * Duty cycles are percentages in the range [1,100].
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams#define SYSDC_DC_MAX 100u /* 1 <= DC <= DC_MAX */
35a5a3587fd94b666239c157d3722745250ccbd7Jonathan Adams#endif /* _SYS_SYSDC_IMPL_H */