source: libcfa/src/concurrency/kernel.hfa @ 431cd4f

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change on this file since 431cd4f was 431cd4f, checked in by Thierry Delisle <tdelisle@…>, 3 years ago

Added alternative to relaxed-fifo scheduler.
Disabled by default

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File size: 8.5 KB
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[8118303]1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
[454f478]7// kernel -- Header containing the core of the kernel API
[8118303]8//
9// Author           : Thierry Delisle
[75f3522]10// Created On       : Tue Jan 17 12:27:26 2017
[6b0b624]11// Last Modified By : Peter A. Buhr
[e3fea42]12// Last Modified On : Tue Feb  4 12:29:26 2020
13// Update Count     : 22
[8118303]14//
15
[6b0b624]16#pragma once
[8118303]17
[bd98b58]18#include "invoke.h"
[73abe95]19#include "time_t.hfa"
[d76bd79]20#include "coroutine.hfa"
[bd98b58]21
[1eb239e4]22#include "containers/list.hfa"
[64a7146]23
[8def349]24extern "C" {
[c402739]25        #include <bits/pthreadtypes.h>
[454f478]26        #include <pthread.h>
[c402739]27        #include <linux/types.h>
[8def349]28}
29
[454f478]30#ifdef __CFA_WITH_VERIFY__
31        extern bool __cfaabi_dbg_in_kernel();
32#endif
33
[78da4ab]34//-----------------------------------------------------------------------------
35// I/O
36struct cluster;
37struct $io_context;
38struct $io_arbiter;
39
40struct io_context_params {
41        int num_entries;
42};
43
44void  ?{}(io_context_params & this);
45
[bd98b58]46//-----------------------------------------------------------------------------
[de94a60]47// Processor
[de6319f]48extern struct cluster * mainCluster;
[bd98b58]49
[9b1dcc2]50// Processor id, required for scheduling threads
51struct __processor_id_t {
[58d64a4]52        unsigned id:24;
[8834751]53
54        #if !defined(__CFA_NO_STATISTICS__)
55                struct __stats_t * stats;
56        #endif
[9b1dcc2]57};
58
[094476d]59coroutine processorCtx_t {
60        struct processor * proc;
61};
62
[e60e0dc]63// Wrapper around kernel threads
[37ba662]64struct __attribute__((aligned(128))) processor {
[e60e0dc]65        // Main state
[37ba662]66        inline __processor_id_t;
[025278e]67
68        // Cluster from which to get threads
[de94a60]69        struct cluster * cltr;
[025278e]70
[431cd4f]71        // Ready Queue state per processor
72        struct {
73                unsigned short its;
74                unsigned short itr;
75                unsigned id;
76                unsigned target;
77                unsigned long long int cutoff;
78        } rdq;
[bd0bdd37]79
[37ba662]80        // Set to true to notify the processor should terminate
81        volatile bool do_terminate;
82
83        // Coroutine ctx who does keeps the state of the processor
84        struct processorCtx_t runner;
85
[de6319f]86        // Name of the processor
87        const char * name;
88
[025278e]89        // Handle to pthreads
90        pthread_t kernel_thread;
[2ac095d]91
[78da4ab]92        struct {
[dddb3dd0]93                $io_context * ctx;
94                bool pending;
95                bool dirty;
[78da4ab]96        } io;
97
[e60e0dc]98        // Preemption data
[025278e]99        // Node which is added in the discrete event simulaiton
100        struct alarm_node_t * preemption_alarm;
101
102        // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible
103        bool pending_preemption;
[c81ebf9]104
[92e7631]105        // Idle lock (kernel semaphore)
[dddb3dd0]106        int idle;
[85b1deb]107
[92e7631]108        // Termination synchronisation (user semaphore)
[454f478]109        oneshot terminated;
[de94a60]110
[27f5f71]111        // pthread Stack
112        void * stack;
113
[de94a60]114        // Link lists fields
[1eb239e4]115        DLISTED_MGD_IMPL_IN(processor)
[14a61b5]116
[a1538cd]117        // special init fields
118        // This is needed for memcached integration
119        // once memcached experiments are done this should probably be removed
120        // it is not a particularly safe scheme as it can make processors less homogeneous
121        struct {
[a5e7233]122                $thread * thrd;
[a1538cd]123        } init;
124
[c34ebf2]125        #if !defined(__CFA_NO_STATISTICS__)
[69fbc61]126                int print_stats;
[c34ebf2]127                bool print_halts;
128        #endif
129
[e60e0dc]130#ifdef __CFA_DEBUG__
[025278e]131        // Last function to enable preemption on this processor
[cdbfab0]132        const char * last_enable;
[e60e0dc]133#endif
[c84e80a]134};
135
[a5e7233]136void  ?{}(processor & this, const char name[], struct cluster & cltr);
[242a902]137void ^?{}(processor & this);
[c84e80a]138
[a5e7233]139static inline void  ?{}(processor & this)                        { this{ "Anonymous Processor", *mainCluster}; }
140static inline void  ?{}(processor & this, struct cluster & cltr) { this{ "Anonymous Processor", cltr}; }
141static inline void  ?{}(processor & this, const char name[])     { this{name, *mainCluster}; }
[de6319f]142
[1eb239e4]143DLISTED_MGD_IMPL_OUT(processor)
[de94a60]144
[7768b8d]145//-----------------------------------------------------------------------------
146// Cluster Tools
[dca5802]147
[9cc3a18]148// Intrusives lanes which are used by the ready queue
[61d7bec]149struct __attribute__((aligned(128))) __intrusive_lane_t;
[dca5802]150void  ?{}(__intrusive_lane_t & this);
151void ^?{}(__intrusive_lane_t & this);
[7768b8d]152
[9cc3a18]153// Aligned timestamps which are used by the relaxed ready queue
154struct __attribute__((aligned(128))) __timestamp_t;
155void  ?{}(__timestamp_t & this);
156void ^?{}(__timestamp_t & this);
157
[b798713]158//TODO adjust cache size to ARCHITECTURE
[dca5802]159// Structure holding the relaxed ready queue
[37ba662]160struct __ready_queue_t {
[dca5802]161        // Data tracking the actual lanes
162        // On a seperate cacheline from the used struct since
163        // used can change on each push/pop but this data
164        // only changes on shrink/grow
[37ba662]165        struct {
[dca5802]166                // Arary of lanes
167                __intrusive_lane_t * volatile data;
168
[9cc3a18]169                // Array of times
170                __timestamp_t * volatile tscs;
171
[dca5802]172                // Number of lanes (empty or not)
[b798713]173                volatile size_t count;
[dca5802]174        } lanes;
[b798713]175};
176
177void  ?{}(__ready_queue_t & this);
178void ^?{}(__ready_queue_t & this);
179
[1eb239e4]180// Idle Sleep
[6a9b12b]181struct __cluster_proc_list {
[1eb239e4]182        // Spin lock protecting the queue
183        volatile uint64_t lock;
184
185        // Total number of processors
186        unsigned total;
187
188        // Total number of idle processors
189        unsigned idle;
190
191        // List of idle processors
[6a9b12b]192        dlist(processor, processor) idles;
[fc59b580]193
194        // List of active processors
195        dlist(processor, processor) actives;
[1eb239e4]196};
197
[de94a60]198//-----------------------------------------------------------------------------
199// Cluster
[37ba662]200struct __attribute__((aligned(128))) cluster {
[de94a60]201        // Ready queue for threads
[b798713]202        __ready_queue_t ready_queue;
[de94a60]203
204        // Name of the cluster
205        const char * name;
206
207        // Preemption rate on this cluster
208        Duration preemption_rate;
209
[64a7146]210        // List of idle processors
[6a9b12b]211        __cluster_proc_list procs;
[de94a60]212
[d4e68a6]213        // List of threads
[a1a17a7]214        __spinlock_t thread_list_lock;
[ac2b598]215        __dllist_t(struct $thread) threads;
[d4e68a6]216        unsigned int nthreads;
[a1a17a7]217
[de94a60]218        // Link lists fields
[ea8b2f7]219        struct __dbg_node_cltr {
[de94a60]220                cluster * next;
221                cluster * prev;
222        } node;
[92976d9]223
[f00b26d4]224        struct {
[78da4ab]225                $io_arbiter * arbiter;
226                io_context_params params;
[f00b26d4]227        } io;
[038be32]228
229        #if !defined(__CFA_NO_STATISTICS__)
[8834751]230                struct __stats_t * stats;
[69fbc61]231                int print_stats;
[038be32]232        #endif
[de94a60]233};
234extern Duration default_preemption();
235
[f00b26d4]236void ?{} (cluster & this, const char name[], Duration preemption_rate, unsigned num_io, const io_context_params & io_params);
[de94a60]237void ^?{}(cluster & this);
238
[f00b26d4]239static inline void ?{} (cluster & this)                                            { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), 1, default_params}; }
240static inline void ?{} (cluster & this, Duration preemption_rate)                  { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, 1, default_params}; }
241static inline void ?{} (cluster & this, const char name[])                         { io_context_params default_params;    this{name, default_preemption(), 1, default_params}; }
242static inline void ?{} (cluster & this, unsigned num_io)                           { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), num_io, default_params}; }
243static inline void ?{} (cluster & this, Duration preemption_rate, unsigned num_io) { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, num_io, default_params}; }
244static inline void ?{} (cluster & this, const char name[], unsigned num_io)        { io_context_params default_params;    this{name, default_preemption(), num_io, default_params}; }
245static inline void ?{} (cluster & this, const io_context_params & io_params)                                            { this{"Anonymous Cluster", default_preemption(), 1, io_params}; }
246static inline void ?{} (cluster & this, Duration preemption_rate, const io_context_params & io_params)                  { this{"Anonymous Cluster", preemption_rate, 1, io_params}; }
247static inline void ?{} (cluster & this, const char name[], const io_context_params & io_params)                         { this{name, default_preemption(), 1, io_params}; }
248static inline void ?{} (cluster & this, unsigned num_io, const io_context_params & io_params)                           { this{"Anonymous Cluster", default_preemption(), num_io, io_params}; }
249static inline void ?{} (cluster & this, Duration preemption_rate, unsigned num_io, const io_context_params & io_params) { this{"Anonymous Cluster", preemption_rate, num_io, io_params}; }
250static inline void ?{} (cluster & this, const char name[], unsigned num_io, const io_context_params & io_params)        { this{name, default_preemption(), num_io, io_params}; }
[de94a60]251
[c7a900a]252static inline [cluster *&, cluster *& ] __get( cluster & this ) __attribute__((const)) { return this.node.[next, prev]; }
[de94a60]253
[8fc652e0]254static inline struct processor * active_processor() { return publicTLS_get( this_processor ); } // UNSAFE
255static inline struct cluster   * active_cluster  () { return publicTLS_get( this_processor )->cltr; }
[d4e68a6]256
[038be32]257#if !defined(__CFA_NO_STATISTICS__)
[8fc652e0]258        void print_stats_now( cluster & this, int flags );
259
[69fbc61]260        static inline void print_stats_at_exit( cluster & this, int flags ) {
261                this.print_stats |= flags;
[038be32]262        }
[c34ebf2]263
[69fbc61]264        static inline void print_stats_at_exit( processor & this, int flags ) {
265                this.print_stats |= flags;
[c34ebf2]266        }
267
268        void print_halts( processor & this );
[038be32]269#endif
270
[8118303]271// Local Variables: //
[6b0b624]272// mode: c //
273// tab-width: 4 //
[8118303]274// End: //
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