source: libcfa/src/concurrency/kernel.hfa@ 304de00

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 304de00 was a5e7233, checked in by Thierry Delisle <tdelisle@…>, 5 years 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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