source: libcfa/src/concurrency/kernel.hfa@ f815c46

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since f815c46 was dddb3dd0, checked in by Thierry Delisle <tdelisle@…>, 5 years 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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