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209 lines
8.8 KiB
C++
209 lines
8.8 KiB
C++
/* stats.h -*-C++-*-
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*
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*************************************************************************
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*
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* @copyright
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* Copyright (C) 2009-2013, Intel Corporation
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* All rights reserved.
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*
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* @copyright
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* @copyright
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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**************************************************************************/
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/**
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* @file stats.h
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*
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* @brief Support for gathering and reporting statistics on Cilk applications.
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*
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* Note that stats are normally NOT compiled in because it increases the
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* overhead of stealing. To compile in profiling support, define CILK_PROFILE.
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*/
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#ifndef INCLUDED_STATS_DOT_H
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#define INCLUDED_STATS_DOT_H
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/* #define CILK_PROFILE 1 */
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// @note The CILK_PROFILE flag and intervals is known to be broken
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// in at least programs with Windows exceptions.
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// Enable this flag at your own peril. :)
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#include <cilk/common.h>
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#include "rts-common.h"
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#include "internal/abi.h"
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#ifdef CILK_PROFILE
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#include <stdio.h> // Define FILE *
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#endif
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__CILKRTS_BEGIN_EXTERN_C
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/** @brief Events that we measure. */
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enum interval
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{
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INTERVAL_IN_SCHEDULER, ///< Time threads spend "bound" to Cilk
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INTERVAL_WORKING, ///< Time spent working
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INTERVAL_IN_RUNTIME, ///< Time spent executing runtime scheduling loop
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INTERVAL_STEALING, ///< Time spent stealing work
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INTERVAL_STEAL_SUCCESS, ///< Time to do a successful steal
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INTERVAL_STEAL_FAIL_EMPTYQ, ///< Count of steal failures due to lack of stealable work
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INTERVAL_STEAL_FAIL_LOCK, ///< Count of steal failures due to failure to lock worker
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INTERVAL_STEAL_FAIL_USER_WORKER, ///< Count of steal failures by user workers which attempt to steal from another team
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INTERVAL_STEAL_FAIL_DEKKER, ///< Count of steal failures due to Dekker protocol failure
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INTERVAL_SYNC_CHECK, ///< Time spent processing syncs
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INTERVAL_THE_EXCEPTION_CHECK, ///< Time spent performing THE exception checks
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INTERVAL_THE_EXCEPTION_CHECK_USELESS, ///< Count of useless THE exception checks
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INTERVAL_RETURNING, ///< Time spent returning from calls
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INTERVAL_FINALIZE_CHILD, ///< Time spent in finalize_child
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INTERVAL_PROVABLY_GOOD_STEAL, ///< Time spent in provably_good_steal
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INTERVAL_UNCONDITIONAL_STEAL, ///< Time spent in unconditional_steal
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INTERVAL_ALLOC_FULL_FRAME, ///< Time spent in __cilkrts_make_full_frame
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INTERVAL_FRAME_ALLOC_LARGE, ///< Count of calls to __cilkrts_frame_malloc for buffers bigger than FRAME_MALLOC_MAX_SIZE or with a NULL worker
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INTERVAL_FRAME_ALLOC, ///< Time spent allocating memory from worker buckets
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INTERVAL_FRAME_ALLOC_GLOBAL, ///< Time spent calling memory allocator when buckets are empty
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INTERVAL_FRAME_FREE_LARGE, ///< Count of calls to __cilkrts_frame_malloc for buffers bigger than FRAME_MALLOC_MAX_SIZE or with a NULL worker
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INTERVAL_FRAME_FREE, ///< Time spent freeing memory to worker buckets
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INTERVAL_FRAME_FREE_GLOBAL, ///< Time spent calling memory deallocator when buckets are full
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INTERVAL_MUTEX_LOCK, ///< Count of calls to __cilkrts_mutex_lock for a worker
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INTERVAL_MUTEX_LOCK_SPINNING, ///< Time spent spinning in __cilkrts_mutex_lock for a worker
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INTERVAL_MUTEX_LOCK_YIELDING, ///< Time spent yielding in __cilkrts_mutex_lock for a worker
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INTERVAL_MUTEX_TRYLOCK, ///< Count of calls to __cilkrts_mutex_trylock
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INTERVAL_FIBER_ALLOCATE, ///< Time spent calling cilk_fiber_allocate
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INTERVAL_FIBER_DEALLOCATE, ///< Time spent calling cilk_fiber_deallocate (not from thread)
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INTERVAL_FIBER_ALLOCATE_FROM_THREAD, ///< Time spent calling cilk_fiber_allocate_from_thread
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INTERVAL_FIBER_DEALLOCATE_FROM_THREAD, ///< Time spent calling cilk_fiber_deallocate (from thread)
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INTERVAL_SUSPEND_RESUME_OTHER, ///< Count of fiber suspend_self_and_resume_other
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INTERVAL_DEALLOCATE_RESUME_OTHER, ///< Count of fiber deallocate_self_and_resume_other
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INTERVAL_N ///< Number of intervals, must be last
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};
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/**
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* @brief Struct that collects of all runtime statistics.
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*
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* There is an instance of this structure in each worker's
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* local_state, as well as one in the @c global_state_t which will be
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* used to accumulate the per-worker stats.
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*/
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typedef struct statistics
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{
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/** Number of times each interval is entered */
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unsigned long long count[INTERVAL_N];
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/**
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* Time when the system entered each interval, in system-dependent
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* "ticks"
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*/
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unsigned long long start[INTERVAL_N];
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/** Total time spent in each interval, in system-dependent "ticks" */
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unsigned long long accum[INTERVAL_N];
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/**
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* Largest global number of stacks seen by this worker.
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* The true maximum at end of execution is the max of the
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* worker maxima.
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*/
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long stack_hwm;
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} statistics;
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/**
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* Initializes a statistics structure
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*
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* @param s The statistics structure to be initialized.
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*/
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COMMON_PORTABLE void __cilkrts_init_stats(statistics *s);
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/**
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* @brief Sums statistics from worker to the global struct
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*
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* @param to The statistics structure that will accumulate the information.
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* This structure is usually @c g->stats.
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* @param from The statistics structure that will be accumulated.
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* This structure is usually statistics kept per worker.
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*/
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COMMON_PORTABLE
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void __cilkrts_accum_stats(statistics *to, statistics *from);
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/**
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* @brief Mark the start of an interval by saving the current tick count.
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*
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* @pre Start time == INVALID_START
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*
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* @param w The worker we're accumulating stats for.
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* @param i The interval we're accumulating stats for.
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*/
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COMMON_PORTABLE
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void __cilkrts_start_interval(__cilkrts_worker *w, enum interval i);
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/**
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* @brief Mark the end of an interval by adding the ticks since the
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* start to the accumulated time.
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*
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* @pre Start time != INVALID_START
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*
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* @param w The worker we're accumulating stats for.
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* @param i The interval we're accumulating stats for.
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*/
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COMMON_PORTABLE
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void __cilkrts_stop_interval(__cilkrts_worker *w, enum interval i);
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/**
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* @brief Start and stop interval I, charging zero time against it
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*
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* Precondition:
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* - Start time == INVALID_START
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*
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* @param w The worker we're accumulating stats for.
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* @param i The interval we're accumulating stats for.
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*/
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COMMON_PORTABLE
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void __cilkrts_note_interval(__cilkrts_worker *w, enum interval i);
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#ifdef CILK_PROFILE
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COMMON_PORTABLE
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void dump_stats_to_file(FILE *stat_file, statistics *s);
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#endif
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#ifdef CILK_PROFILE
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# define START_INTERVAL(w, i) __cilkrts_start_interval(w, i);
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# define STOP_INTERVAL(w, i) __cilkrts_stop_interval(w, i);
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# define NOTE_INTERVAL(w, i) __cilkrts_note_interval(w, i);
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#else
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/** Start an interval. No effect unless CILK_PROFILE is defined. */
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# define START_INTERVAL(w, i)
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/** End an interval. No effect unless CILK_PROFILE is defined. */
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# define STOP_INTERVAL(w, i)
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/** Increment a counter. No effect unless CILK_PROFILE is defined. */
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# define NOTE_INTERVAL(w, i)
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#endif
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__CILKRTS_END_EXTERN_C
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#endif // ! defined(INCLUDED_STATS_DOT_H)
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