source: libcfa/src/concurrency/kernel.hfa @ dddb3dd0

arm-ehjacob/cs343-translationnew-ast-unique-expr
Last change on this file since dddb3dd0 was dddb3dd0, checked in by Thierry Delisle <tdelisle@…>, 8 months ago

Changed io to use ring per kernel threads.

  • Property mode set to 100644
File size: 8.1 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        #if !defined(__CFA_NO_STATISTICS__)
110                int print_stats;
111                bool print_halts;
112        #endif
113
114#ifdef __CFA_DEBUG__
115        // Last function to enable preemption on this processor
116        const char * last_enable;
117#endif
118};
119
120void  ?{}(processor & this, const char name[], struct cluster & cltr);
121void ^?{}(processor & this);
122
123static inline void  ?{}(processor & this)                    { this{ "Anonymous Processor", *mainCluster}; }
124static inline void  ?{}(processor & this, struct cluster & cltr)    { this{ "Anonymous Processor", cltr}; }
125static inline void  ?{}(processor & this, const char name[]) { this{name, *mainCluster }; }
126
127DLISTED_MGD_IMPL_OUT(processor)
128
129//-----------------------------------------------------------------------------
130// Cluster Tools
131
132// Intrusives lanes which are used by the relaxed ready queue
133struct __attribute__((aligned(128))) __intrusive_lane_t;
134void  ?{}(__intrusive_lane_t & this);
135void ^?{}(__intrusive_lane_t & this);
136
137// Counter used for wether or not the lanes are all empty
138struct __attribute__((aligned(128))) __snzi_node_t;
139struct __snzi_t {
140        unsigned mask;
141        int root;
142        __snzi_node_t * nodes;
143};
144
145void  ?{}( __snzi_t & this, unsigned depth );
146void ^?{}( __snzi_t & this );
147
148//TODO adjust cache size to ARCHITECTURE
149// Structure holding the relaxed ready queue
150struct __ready_queue_t {
151        // Data tracking how many/which lanes are used
152        // Aligned to 128 for cache locality
153        __snzi_t snzi;
154
155        // Data tracking the actual lanes
156        // On a seperate cacheline from the used struct since
157        // used can change on each push/pop but this data
158        // only changes on shrink/grow
159        struct {
160                // Arary of lanes
161                __intrusive_lane_t * volatile data;
162
163                // Number of lanes (empty or not)
164                volatile size_t count;
165        } lanes;
166};
167
168void  ?{}(__ready_queue_t & this);
169void ^?{}(__ready_queue_t & this);
170
171// Idle Sleep
172struct __cluster_idles {
173        // Spin lock protecting the queue
174        volatile uint64_t lock;
175
176        // Total number of processors
177        unsigned total;
178
179        // Total number of idle processors
180        unsigned idle;
181
182        // List of idle processors
183        dlist(processor, processor) list;
184};
185
186//-----------------------------------------------------------------------------
187// Cluster
188struct __attribute__((aligned(128))) cluster {
189        // Ready queue for threads
190        __ready_queue_t ready_queue;
191
192        // Name of the cluster
193        const char * name;
194
195        // Preemption rate on this cluster
196        Duration preemption_rate;
197
198        // List of idle processors
199        __cluster_idles idles;
200
201        // List of threads
202        __spinlock_t thread_list_lock;
203        __dllist_t(struct $thread) threads;
204        unsigned int nthreads;
205
206        // Link lists fields
207        struct __dbg_node_cltr {
208                cluster * next;
209                cluster * prev;
210        } node;
211
212        struct {
213                $io_arbiter * arbiter;
214                io_context_params params;
215        } io;
216
217        #if !defined(__CFA_NO_STATISTICS__)
218                struct __stats_t * stats;
219                int print_stats;
220        #endif
221};
222extern Duration default_preemption();
223
224void ?{} (cluster & this, const char name[], Duration preemption_rate, unsigned num_io, const io_context_params & io_params);
225void ^?{}(cluster & this);
226
227static inline void ?{} (cluster & this)                                            { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), 1, default_params}; }
228static inline void ?{} (cluster & this, Duration preemption_rate)                  { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, 1, default_params}; }
229static inline void ?{} (cluster & this, const char name[])                         { io_context_params default_params;    this{name, default_preemption(), 1, default_params}; }
230static inline void ?{} (cluster & this, unsigned num_io)                           { io_context_params default_params;    this{"Anonymous Cluster", default_preemption(), num_io, default_params}; }
231static inline void ?{} (cluster & this, Duration preemption_rate, unsigned num_io) { io_context_params default_params;    this{"Anonymous Cluster", preemption_rate, num_io, default_params}; }
232static inline void ?{} (cluster & this, const char name[], unsigned num_io)        { io_context_params default_params;    this{name, default_preemption(), num_io, default_params}; }
233static inline void ?{} (cluster & this, const io_context_params & io_params)                                            { this{"Anonymous Cluster", default_preemption(), 1, io_params}; }
234static inline void ?{} (cluster & this, Duration preemption_rate, const io_context_params & io_params)                  { this{"Anonymous Cluster", preemption_rate, 1, io_params}; }
235static inline void ?{} (cluster & this, const char name[], const io_context_params & io_params)                         { this{name, default_preemption(), 1, io_params}; }
236static inline void ?{} (cluster & this, unsigned num_io, const io_context_params & io_params)                           { this{"Anonymous Cluster", default_preemption(), num_io, io_params}; }
237static 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}; }
238static inline void ?{} (cluster & this, const char name[], unsigned num_io, const io_context_params & io_params)        { this{name, default_preemption(), num_io, io_params}; }
239
240static inline [cluster *&, cluster *& ] __get( cluster & this ) __attribute__((const)) { return this.node.[next, prev]; }
241
242static inline struct processor * active_processor() { return publicTLS_get( this_processor ); } // UNSAFE
243static inline struct cluster   * active_cluster  () { return publicTLS_get( this_processor )->cltr; }
244
245#if !defined(__CFA_NO_STATISTICS__)
246        void print_stats_now( cluster & this, int flags );
247
248        static inline void print_stats_at_exit( cluster & this, int flags ) {
249                this.print_stats |= flags;
250        }
251
252        static inline void print_stats_at_exit( processor & this, int flags ) {
253                this.print_stats |= flags;
254        }
255
256        void print_halts( processor & this );
257#endif
258
259// Local Variables: //
260// mode: c //
261// tab-width: 4 //
262// End: //
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