source: libcfa/src/concurrency/kernel.hfa @ a5e7233

arm-ehjacob/cs343-translationnew-ast-unique-expr
Last change on this file since a5e7233 was a5e7233, checked in by Thierry Delisle <tdelisle@…>, 9 months ago

C interface now runs worker init routine in dedicated thread.
Also added test for this case.

  • Property mode set to 100644
File size: 8.4 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 -- Header containing the core of the kernel API
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/list.hfa"
23
24extern "C" {
25        #include <bits/pthreadtypes.h>
26        #include <pthread.h>
27        #include <linux/types.h>
28}
29
30#ifdef __CFA_WITH_VERIFY__
31        extern bool __cfaabi_dbg_in_kernel();
32#endif
33
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
46//-----------------------------------------------------------------------------
47// Processor
48extern struct cluster * mainCluster;
49
50// Processor id, required for scheduling threads
51struct __processor_id_t {
52        unsigned id:24;
53        bool full_proc:1;
54
55        #if !defined(__CFA_NO_STATISTICS__)
56                struct __stats_t * stats;
57        #endif
58};
59
60coroutine processorCtx_t {
61        struct processor * proc;
62};
63
64// Wrapper around kernel threads
65struct __attribute__((aligned(128))) processor {
66        // Main state
67        inline __processor_id_t;
68
69        // Cluster from which to get threads
70        struct cluster * cltr;
71
72        // Set to true to notify the processor should terminate
73        volatile bool do_terminate;
74
75        // Coroutine ctx who does keeps the state of the processor
76        struct processorCtx_t runner;
77
78        // Name of the processor
79        const char * name;
80
81        // Handle to pthreads
82        pthread_t kernel_thread;
83
84        struct {
85                $io_context * ctx;
86                bool pending;
87                bool dirty;
88        } io;
89
90        // Preemption data
91        // Node which is added in the discrete event simulaiton
92        struct alarm_node_t * preemption_alarm;
93
94        // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible
95        bool pending_preemption;
96
97        // Idle lock (kernel semaphore)
98        int idle;
99
100        // Termination synchronisation (user semaphore)
101        oneshot terminated;
102
103        // pthread Stack
104        void * stack;
105
106        // Link lists fields
107        DLISTED_MGD_IMPL_IN(processor)
108
109        // special init fields
110        // This is needed for memcached integration
111        // once memcached experiments are done this should probably be removed
112        // it is not a particularly safe scheme as it can make processors less homogeneous
113        struct {
114                $thread * thrd;
115        } init;
116
117        #if !defined(__CFA_NO_STATISTICS__)
118                int print_stats;
119                bool print_halts;
120        #endif
121
122#ifdef __CFA_DEBUG__
123        // Last function to enable preemption on this processor
124        const char * last_enable;
125#endif
126};
127
128void  ?{}(processor & this, const char name[], struct cluster & cltr);
129void ^?{}(processor & this);
130
131static inline void  ?{}(processor & this)                        { this{ "Anonymous Processor", *mainCluster}; }
132static inline void  ?{}(processor & this, struct cluster & cltr) { this{ "Anonymous Processor", cltr}; }
133static inline void  ?{}(processor & this, const char name[])     { this{name, *mainCluster}; }
134
135DLISTED_MGD_IMPL_OUT(processor)
136
137//-----------------------------------------------------------------------------
138// Cluster Tools
139
140// Intrusives lanes which are used by the relaxed ready queue
141struct __attribute__((aligned(128))) __intrusive_lane_t;
142void  ?{}(__intrusive_lane_t & this);
143void ^?{}(__intrusive_lane_t & this);
144
145// Counter used for wether or not the lanes are all empty
146struct __attribute__((aligned(128))) __snzi_node_t;
147struct __snzi_t {
148        unsigned mask;
149        int root;
150        __snzi_node_t * nodes;
151};
152
153void  ?{}( __snzi_t & this, unsigned depth );
154void ^?{}( __snzi_t & this );
155
156//TODO adjust cache size to ARCHITECTURE
157// Structure holding the relaxed ready queue
158struct __ready_queue_t {
159        // Data tracking how many/which lanes are used
160        // Aligned to 128 for cache locality
161        __snzi_t snzi;
162
163        // Data tracking the actual lanes
164        // On a seperate cacheline from the used struct since
165        // used can change on each push/pop but this data
166        // only changes on shrink/grow
167        struct {
168                // Arary of lanes
169                __intrusive_lane_t * volatile data;
170
171                // Number of lanes (empty or not)
172                volatile size_t count;
173        } lanes;
174};
175
176void  ?{}(__ready_queue_t & this);
177void ^?{}(__ready_queue_t & this);
178
179// Idle Sleep
180struct __cluster_idles {
181        // Spin lock protecting the queue
182        volatile uint64_t lock;
183
184        // Total number of processors
185        unsigned total;
186
187        // Total number of idle processors
188        unsigned idle;
189
190        // List of idle processors
191        dlist(processor, processor) list;
192};
193
194//-----------------------------------------------------------------------------
195// Cluster
196struct __attribute__((aligned(128))) cluster {
197        // Ready queue for threads
198        __ready_queue_t ready_queue;
199
200        // Name of the cluster
201        const char * name;
202
203        // Preemption rate on this cluster
204        Duration preemption_rate;
205
206        // List of idle processors
207        __cluster_idles idles;
208
209        // List of threads
210        __spinlock_t thread_list_lock;
211        __dllist_t(struct $thread) threads;
212        unsigned int nthreads;
213
214        // Link lists fields
215        struct __dbg_node_cltr {
216                cluster * next;
217                cluster * prev;
218        } node;
219
220        struct {
221                $io_arbiter * arbiter;
222                io_context_params params;
223        } io;
224
225        #if !defined(__CFA_NO_STATISTICS__)
226                struct __stats_t * stats;
227                int print_stats;
228        #endif
229};
230extern Duration default_preemption();
231
232void ?{} (cluster & this, const char name[], Duration preemption_rate, unsigned num_io, const io_context_params & io_params);
233void ^?{}(cluster & this);
234
235static inline void ?{} (cluster & this)                                            { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), 1, default_params}; }
236static inline void ?{} (cluster & this, Duration preemption_rate)                  { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, 1, default_params}; }
237static inline void ?{} (cluster & this, const char name[])                         { io_context_params default_params;    this{name, default_preemption(), 1, default_params}; }
238static inline void ?{} (cluster & this, unsigned num_io)                           { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), num_io, default_params}; }
239static inline void ?{} (cluster & this, Duration preemption_rate, unsigned num_io) { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, num_io, default_params}; }
240static inline void ?{} (cluster & this, const char name[], unsigned num_io)        { io_context_params default_params;    this{name, default_preemption(), num_io, default_params}; }
241static inline void ?{} (cluster & this, const io_context_params & io_params)                                            { this{"Anonymous Cluster", default_preemption(), 1, io_params}; }
242static inline void ?{} (cluster & this, Duration preemption_rate, const io_context_params & io_params)                  { this{"Anonymous Cluster", preemption_rate, 1, io_params}; }
243static inline void ?{} (cluster & this, const char name[], const io_context_params & io_params)                         { this{name, default_preemption(), 1, io_params}; }
244static inline void ?{} (cluster & this, unsigned num_io, const io_context_params & io_params)                           { this{"Anonymous Cluster", default_preemption(), num_io, io_params}; }
245static 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}; }
246static inline void ?{} (cluster & this, const char name[], unsigned num_io, const io_context_params & io_params)        { this{name, default_preemption(), num_io, io_params}; }
247
248static inline [cluster *&, cluster *& ] __get( cluster & this ) __attribute__((const)) { return this.node.[next, prev]; }
249
250static inline struct processor * active_processor() { return publicTLS_get( this_processor ); } // UNSAFE
251static inline struct cluster   * active_cluster  () { return publicTLS_get( this_processor )->cltr; }
252
253#if !defined(__CFA_NO_STATISTICS__)
254        void print_stats_now( cluster & this, int flags );
255
256        static inline void print_stats_at_exit( cluster & this, int flags ) {
257                this.print_stats |= flags;
258        }
259
260        static inline void print_stats_at_exit( processor & this, int flags ) {
261                this.print_stats |= flags;
262        }
263
264        void print_halts( processor & this );
265#endif
266
267// Local Variables: //
268// mode: c //
269// tab-width: 4 //
270// End: //
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