source: libcfa/src/concurrency/kernel.hfa @ 3e2b9c9

arm-ehjacob/cs343-translationnew-astnew-ast-unique-expr
Last change on this file since 3e2b9c9 was 3e2b9c9, checked in by Thierry Delisle <tdelisle@…>, 16 months ago

More restructuring of translation units
Unclear if it improves compilation time.

  • Property mode set to 100644
File size: 8.8 KB
Line 
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//
7// kernel --
8//
9// Author           : Thierry Delisle
10// Created On       : Tue Jan 17 12:27:26 2017
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Tue Feb  4 12:29:26 2020
13// Update Count     : 22
14//
15
16#pragma once
17
18#include "invoke.h"
19#include "time_t.hfa"
20#include "coroutine.hfa"
21
22#include "containers/stackLockFree.hfa"
23
24extern "C" {
25#include <bits/pthreadtypes.h>
26}
27
28//-----------------------------------------------------------------------------
29// Locks
30struct semaphore {
31        __spinlock_t lock;
32        int count;
33        __queue_t($thread) waiting;
34};
35
36void  ?{}(semaphore & this, int count = 1);
37void ^?{}(semaphore & this);
38bool   P (semaphore & this);
39bool   V (semaphore & this);
40bool   V (semaphore & this, unsigned count);
41
42
43//-----------------------------------------------------------------------------
44// Processor
45extern struct cluster * mainCluster;
46
47// Processor id, required for scheduling threads
48struct __processor_id_t {
49        unsigned id;
50
51        #if !defined(__CFA_NO_STATISTICS__)
52                struct __stats_t * stats;
53        #endif
54};
55
56coroutine processorCtx_t {
57        struct processor * proc;
58};
59
60// Wrapper around kernel threads
61struct __attribute__((aligned(128))) processor {
62        // Main state
63        inline __processor_id_t;
64
65        // Cluster from which to get threads
66        struct cluster * cltr;
67
68        // Set to true to notify the processor should terminate
69        volatile bool do_terminate;
70
71        // Coroutine ctx who does keeps the state of the processor
72        struct processorCtx_t runner;
73
74        // Name of the processor
75        const char * name;
76
77        // Handle to pthreads
78        pthread_t kernel_thread;
79
80        // RunThread data
81        // Action to do after a thread is ran
82        $thread * destroyer;
83
84        // Preemption data
85        // Node which is added in the discrete event simulaiton
86        struct alarm_node_t * preemption_alarm;
87
88        // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible
89        bool pending_preemption;
90
91        // Idle lock (kernel semaphore)
92        __bin_sem_t idle;
93
94        // Termination synchronisation (user semaphore)
95        semaphore terminated;
96
97        // pthread Stack
98        void * stack;
99
100        // Link lists fields
101        Link(processor) link;
102
103        #if !defined(__CFA_NO_STATISTICS__)
104                int print_stats;
105                bool print_halts;
106        #endif
107
108#ifdef __CFA_DEBUG__
109        // Last function to enable preemption on this processor
110        const char * last_enable;
111#endif
112};
113
114void  ?{}(processor & this, const char name[], struct cluster & cltr);
115void ^?{}(processor & this);
116
117static inline void  ?{}(processor & this)                    { this{ "Anonymous Processor", *mainCluster}; }
118static inline void  ?{}(processor & this, struct cluster & cltr)    { this{ "Anonymous Processor", cltr}; }
119static inline void  ?{}(processor & this, const char name[]) { this{name, *mainCluster }; }
120
121static inline Link(processor) * ?`next( processor * this ) { return &this->link; }
122
123//-----------------------------------------------------------------------------
124// I/O
125struct __io_data;
126
127// IO poller user-thread
128// Not using the "thread" keyword because we want to control
129// more carefully when to start/stop it
130struct $io_ctx_thread {
131        struct __io_data * ring;
132        single_sem sem;
133        volatile bool done;
134        $thread self;
135};
136
137
138struct io_context {
139        $io_ctx_thread thrd;
140};
141
142struct io_context_params {
143        int num_entries;
144        int num_ready;
145        int submit_aff;
146        bool eager_submits:1;
147        bool poller_submits:1;
148        bool poll_submit:1;
149        bool poll_complete:1;
150};
151
152void  ?{}(io_context_params & this);
153
154void  ?{}(io_context & this, struct cluster & cl);
155void  ?{}(io_context & this, struct cluster & cl, const io_context_params & params);
156void ^?{}(io_context & this);
157
158struct io_cancellation {
159        uint32_t target;
160};
161
162static inline void  ?{}(io_cancellation & this) { this.target = -1u; }
163static inline void ^?{}(io_cancellation & this) {}
164bool cancel(io_cancellation & this);
165
166//-----------------------------------------------------------------------------
167// Cluster Tools
168
169// Intrusives lanes which are used by the relaxed ready queue
170struct __attribute__((aligned(128))) __intrusive_lane_t;
171void  ?{}(__intrusive_lane_t & this);
172void ^?{}(__intrusive_lane_t & this);
173
174// Counter used for wether or not the lanes are all empty
175struct __attribute__((aligned(128))) __snzi_node_t;
176struct __snzi_t {
177        unsigned mask;
178        int root;
179        __snzi_node_t * nodes;
180};
181
182void  ?{}( __snzi_t & this, unsigned depth );
183void ^?{}( __snzi_t & this );
184
185//TODO adjust cache size to ARCHITECTURE
186// Structure holding the relaxed ready queue
187struct __ready_queue_t {
188        // Data tracking how many/which lanes are used
189        // Aligned to 128 for cache locality
190        __snzi_t snzi;
191
192        // Data tracking the actual lanes
193        // On a seperate cacheline from the used struct since
194        // used can change on each push/pop but this data
195        // only changes on shrink/grow
196        struct {
197                // Arary of lanes
198                __intrusive_lane_t * volatile data;
199
200                // Number of lanes (empty or not)
201                volatile size_t count;
202        } lanes;
203};
204
205void  ?{}(__ready_queue_t & this);
206void ^?{}(__ready_queue_t & this);
207
208//-----------------------------------------------------------------------------
209// Cluster
210struct __attribute__((aligned(128))) cluster {
211        // Ready queue for threads
212        __ready_queue_t ready_queue;
213
214        // Name of the cluster
215        const char * name;
216
217        // Preemption rate on this cluster
218        Duration preemption_rate;
219
220        // List of idle processors
221        StackLF(processor) idles;
222        volatile unsigned int nprocessors;
223
224        // List of threads
225        __spinlock_t thread_list_lock;
226        __dllist_t(struct $thread) threads;
227        unsigned int nthreads;
228
229        // Link lists fields
230        struct __dbg_node_cltr {
231                cluster * next;
232                cluster * prev;
233        } node;
234
235        struct {
236                io_context * ctxs;
237                unsigned cnt;
238        } io;
239
240        #if !defined(__CFA_NO_STATISTICS__)
241                struct __stats_t * stats;
242                int print_stats;
243        #endif
244};
245extern Duration default_preemption();
246
247void ?{} (cluster & this, const char name[], Duration preemption_rate, unsigned num_io, const io_context_params & io_params);
248void ^?{}(cluster & this);
249
250static inline void ?{} (cluster & this)                                            { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), 1, default_params}; }
251static inline void ?{} (cluster & this, Duration preemption_rate)                  { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, 1, default_params}; }
252static inline void ?{} (cluster & this, const char name[])                         { io_context_params default_params;    this{name, default_preemption(), 1, default_params}; }
253static inline void ?{} (cluster & this, unsigned num_io)                           { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), num_io, default_params}; }
254static inline void ?{} (cluster & this, Duration preemption_rate, unsigned num_io) { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, num_io, default_params}; }
255static inline void ?{} (cluster & this, const char name[], unsigned num_io)        { io_context_params default_params;    this{name, default_preemption(), num_io, default_params}; }
256static inline void ?{} (cluster & this, const io_context_params & io_params)                                            { this{"Anonymous Cluster", default_preemption(), 1, io_params}; }
257static inline void ?{} (cluster & this, Duration preemption_rate, const io_context_params & io_params)                  { this{"Anonymous Cluster", preemption_rate, 1, io_params}; }
258static inline void ?{} (cluster & this, const char name[], const io_context_params & io_params)                         { this{name, default_preemption(), 1, io_params}; }
259static inline void ?{} (cluster & this, unsigned num_io, const io_context_params & io_params)                           { this{"Anonymous Cluster", default_preemption(), num_io, io_params}; }
260static 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}; }
261static inline void ?{} (cluster & this, const char name[], unsigned num_io, const io_context_params & io_params)        { this{name, default_preemption(), num_io, io_params}; }
262
263static inline [cluster *&, cluster *& ] __get( cluster & this ) __attribute__((const)) { return this.node.[next, prev]; }
264
265static inline struct processor * active_processor() { return TL_GET( this_processor ); } // UNSAFE
266static inline struct cluster   * active_cluster  () { return TL_GET( this_processor )->cltr; }
267
268#if !defined(__CFA_NO_STATISTICS__)
269        static inline void print_stats_at_exit( cluster & this, int flags ) {
270                this.print_stats |= flags;
271        }
272
273        static inline void print_stats_at_exit( processor & this, int flags ) {
274                this.print_stats |= flags;
275        }
276
277        void print_halts( processor & this );
278#endif
279
280// Local Variables: //
281// mode: c //
282// tab-width: 4 //
283// End: //
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