[8118303] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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[75a17f1] | 7 | // kernel -- |
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[8118303] | 8 | // |
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| 9 | // Author : Thierry Delisle |
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[75f3522] | 10 | // Created On : Tue Jan 17 12:27:26 2017 |
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[6b0b624] | 11 | // Last Modified By : Peter A. Buhr |
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[e3fea42] | 12 | // Last Modified On : Tue Feb 4 12:29:26 2020 |
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| 13 | // Update Count : 22 |
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[8118303] | 14 | // |
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| 15 | |
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[6b0b624] | 16 | #pragma once |
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[8118303] | 17 | |
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[c84e80a] | 18 | #include <stdbool.h> |
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[92976d9] | 19 | #include <stdint.h> |
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[8118303] | 20 | |
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[bd98b58] | 21 | #include "invoke.h" |
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[73abe95] | 22 | #include "time_t.hfa" |
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[d76bd79] | 23 | #include "coroutine.hfa" |
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[bd98b58] | 24 | |
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[8def349] | 25 | extern "C" { |
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| 26 | #include <pthread.h> |
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[6b4cdd3] | 27 | #include <semaphore.h> |
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[8def349] | 28 | } |
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| 29 | |
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[db6f06a] | 30 | //----------------------------------------------------------------------------- |
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| 31 | // Locks |
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[bdeba0b] | 32 | struct semaphore { |
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[ea7d2b0] | 33 | __spinlock_t lock; |
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[bdeba0b] | 34 | int count; |
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[ac2b598] | 35 | __queue_t($thread) waiting; |
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[9c31349] | 36 | }; |
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| 37 | |
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[242a902] | 38 | void ?{}(semaphore & this, int count = 1); |
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| 39 | void ^?{}(semaphore & this); |
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[4cedd9f] | 40 | void P (semaphore & this); |
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[f0ce5f4] | 41 | bool V (semaphore & this); |
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[d384787] | 42 | bool V (semaphore & this, unsigned count); |
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[9c31349] | 43 | |
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[db6f06a] | 44 | |
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[bd98b58] | 45 | //----------------------------------------------------------------------------- |
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[de94a60] | 46 | // Processor |
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[de6319f] | 47 | extern struct cluster * mainCluster; |
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[bd98b58] | 48 | |
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[e60e0dc] | 49 | // Processor |
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[094476d] | 50 | coroutine processorCtx_t { |
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| 51 | struct processor * proc; |
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| 52 | }; |
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| 53 | |
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[e60e0dc] | 54 | // Wrapper around kernel threads |
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[c84e80a] | 55 | struct processor { |
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[e60e0dc] | 56 | // Main state |
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[025278e] | 57 | // Coroutine ctx who does keeps the state of the processor |
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[094476d] | 58 | struct processorCtx_t runner; |
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[025278e] | 59 | |
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| 60 | // Cluster from which to get threads |
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[de94a60] | 61 | struct cluster * cltr; |
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[025278e] | 62 | |
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[de6319f] | 63 | // Name of the processor |
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| 64 | const char * name; |
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| 65 | |
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[025278e] | 66 | // Handle to pthreads |
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| 67 | pthread_t kernel_thread; |
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[2ac095d] | 68 | |
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[e60e0dc] | 69 | // RunThread data |
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[025278e] | 70 | // Action to do after a thread is ran |
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[ac2b598] | 71 | $thread * destroyer; |
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[c81ebf9] | 72 | |
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[e60e0dc] | 73 | // Preemption data |
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[025278e] | 74 | // Node which is added in the discrete event simulaiton |
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| 75 | struct alarm_node_t * preemption_alarm; |
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| 76 | |
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| 77 | // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible |
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| 78 | bool pending_preemption; |
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[c81ebf9] | 79 | |
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[92e7631] | 80 | // Idle lock (kernel semaphore) |
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| 81 | __bin_sem_t idle; |
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[85b1deb] | 82 | |
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| 83 | // Termination |
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| 84 | // Set to true to notify the processor should terminate |
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| 85 | volatile bool do_terminate; |
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| 86 | |
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[92e7631] | 87 | // Termination synchronisation (user semaphore) |
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[85b1deb] | 88 | semaphore terminated; |
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[de94a60] | 89 | |
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[27f5f71] | 90 | // pthread Stack |
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| 91 | void * stack; |
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| 92 | |
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[de94a60] | 93 | // Link lists fields |
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[ea8b2f7] | 94 | struct __dbg_node_proc { |
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[de94a60] | 95 | struct processor * next; |
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| 96 | struct processor * prev; |
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| 97 | } node; |
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[14a61b5] | 98 | |
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[e60e0dc] | 99 | #ifdef __CFA_DEBUG__ |
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[025278e] | 100 | // Last function to enable preemption on this processor |
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[cdbfab0] | 101 | const char * last_enable; |
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[e60e0dc] | 102 | #endif |
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[c84e80a] | 103 | }; |
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| 104 | |
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[e3fea42] | 105 | void ?{}(processor & this, const char name[], struct cluster & cltr); |
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[242a902] | 106 | void ^?{}(processor & this); |
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[c84e80a] | 107 | |
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[de6319f] | 108 | static inline void ?{}(processor & this) { this{ "Anonymous Processor", *mainCluster}; } |
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[de94a60] | 109 | static inline void ?{}(processor & this, struct cluster & cltr) { this{ "Anonymous Processor", cltr}; } |
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[e3fea42] | 110 | static inline void ?{}(processor & this, const char name[]) { this{name, *mainCluster }; } |
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[de6319f] | 111 | |
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[c7a900a] | 112 | static inline [processor *&, processor *& ] __get( processor & this ) __attribute__((const)) { return this.node.[next, prev]; } |
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[de94a60] | 113 | |
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[92976d9] | 114 | //----------------------------------------------------------------------------- |
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| 115 | // I/O |
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| 116 | #if defined(HAVE_LINUX_IO_URING_H) |
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| 117 | struct io_uring_sq { |
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[2d8f7b0] | 118 | // Head and tail of the ring (associated with array) |
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| 119 | volatile uint32_t * head; |
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| 120 | volatile uint32_t * tail; |
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| 121 | |
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| 122 | // The actual kernel ring which uses head/tail |
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| 123 | // indexes into the sqes arrays |
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| 124 | uint32_t * array; |
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| 125 | |
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| 126 | // number of entries and mask to go with it |
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| 127 | const uint32_t * num; |
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| 128 | const uint32_t * mask; |
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| 129 | |
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| 130 | // Submission flags (Not sure what for) |
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[92976d9] | 131 | uint32_t * flags; |
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[2d8f7b0] | 132 | |
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| 133 | // number of sqes not submitted (whatever that means) |
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[92976d9] | 134 | uint32_t * dropped; |
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| 135 | |
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[2d8f7b0] | 136 | // Like head/tail but not seen by the kernel |
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| 137 | volatile uint32_t alloc; |
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[f6660520] | 138 | volatile uint32_t ready; |
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[92976d9] | 139 | |
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[2d8f7b0] | 140 | __spinlock_t lock; |
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| 141 | |
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| 142 | // A buffer of sqes (not the actual ring) |
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| 143 | struct io_uring_sqe * sqes; |
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| 144 | |
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| 145 | // The location and size of the mmaped area |
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[92976d9] | 146 | void * ring_ptr; |
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[2d8f7b0] | 147 | size_t ring_sz; |
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[d384787] | 148 | |
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| 149 | // Statistics |
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[038be32] | 150 | #if !defined(__CFA_NO_STATISTICS__) |
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[d384787] | 151 | struct { |
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[038be32] | 152 | struct { |
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| 153 | unsigned long long int val; |
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| 154 | unsigned long long int cnt; |
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| 155 | } submit_avg; |
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| 156 | } stats; |
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| 157 | #endif |
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[92976d9] | 158 | }; |
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| 159 | |
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| 160 | struct io_uring_cq { |
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[2d8f7b0] | 161 | // Head and tail of the ring |
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[92976d9] | 162 | volatile uint32_t * head; |
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| 163 | volatile uint32_t * tail; |
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[2d8f7b0] | 164 | |
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| 165 | // number of entries and mask to go with it |
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| 166 | const uint32_t * mask; |
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| 167 | const uint32_t * num; |
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| 168 | |
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| 169 | // number of cqes not submitted (whatever that means) |
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[92976d9] | 170 | uint32_t * overflow; |
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[2d8f7b0] | 171 | |
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| 172 | // the kernel ring |
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[92976d9] | 173 | struct io_uring_cqe * cqes; |
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| 174 | |
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[2d8f7b0] | 175 | // The location and size of the mmaped area |
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[92976d9] | 176 | void * ring_ptr; |
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[2d8f7b0] | 177 | size_t ring_sz; |
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[d384787] | 178 | |
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| 179 | // Statistics |
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[038be32] | 180 | #if !defined(__CFA_NO_STATISTICS__) |
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[d384787] | 181 | struct { |
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[038be32] | 182 | struct { |
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| 183 | unsigned long long int val; |
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| 184 | unsigned long long int cnt; |
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| 185 | } completed_avg; |
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| 186 | } stats; |
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| 187 | #endif |
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[92976d9] | 188 | }; |
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| 189 | |
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[f6660520] | 190 | #if defined(__CFA_IO_POLLING_USER__) |
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| 191 | struct __io_poller_fast { |
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| 192 | struct io_ring * ring; |
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| 193 | $thread thrd; |
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| 194 | }; |
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| 195 | #endif |
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| 196 | |
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[92976d9] | 197 | struct io_ring { |
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| 198 | struct io_uring_sq submit_q; |
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| 199 | struct io_uring_cq completion_q; |
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| 200 | uint32_t flags; |
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| 201 | int fd; |
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[2d8f7b0] | 202 | semaphore submit; |
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[f6660520] | 203 | volatile bool done; |
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| 204 | struct { |
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| 205 | struct { |
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| 206 | void * stack; |
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| 207 | pthread_t kthrd; |
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| 208 | } slow; |
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| 209 | #if defined(__CFA_IO_POLLING_USER__) |
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| 210 | __io_poller_fast fast; |
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| 211 | __bin_sem_t sem; |
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| 212 | #endif |
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| 213 | } poller; |
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[92976d9] | 214 | }; |
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| 215 | #endif |
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| 216 | |
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[de94a60] | 217 | //----------------------------------------------------------------------------- |
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| 218 | // Cluster |
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| 219 | struct cluster { |
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| 220 | // Ready queue locks |
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| 221 | __spinlock_t ready_queue_lock; |
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| 222 | |
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| 223 | // Ready queue for threads |
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[ac2b598] | 224 | __queue_t($thread) ready_queue; |
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[de94a60] | 225 | |
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| 226 | // Name of the cluster |
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| 227 | const char * name; |
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| 228 | |
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| 229 | // Preemption rate on this cluster |
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| 230 | Duration preemption_rate; |
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| 231 | |
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| 232 | // List of processors |
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[92e7631] | 233 | __spinlock_t idle_lock; |
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[de94a60] | 234 | __dllist_t(struct processor) procs; |
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| 235 | __dllist_t(struct processor) idles; |
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[d4e68a6] | 236 | unsigned int nprocessors; |
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[de94a60] | 237 | |
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[d4e68a6] | 238 | // List of threads |
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[a1a17a7] | 239 | __spinlock_t thread_list_lock; |
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[ac2b598] | 240 | __dllist_t(struct $thread) threads; |
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[d4e68a6] | 241 | unsigned int nthreads; |
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[a1a17a7] | 242 | |
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[de94a60] | 243 | // Link lists fields |
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[ea8b2f7] | 244 | struct __dbg_node_cltr { |
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[de94a60] | 245 | cluster * next; |
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| 246 | cluster * prev; |
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| 247 | } node; |
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[92976d9] | 248 | |
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| 249 | #if defined(HAVE_LINUX_IO_URING_H) |
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| 250 | struct io_ring io; |
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| 251 | #endif |
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[038be32] | 252 | |
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| 253 | #if !defined(__CFA_NO_STATISTICS__) |
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| 254 | bool print_stats; |
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| 255 | #endif |
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[de94a60] | 256 | }; |
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| 257 | extern Duration default_preemption(); |
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| 258 | |
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[e3fea42] | 259 | void ?{} (cluster & this, const char name[], Duration preemption_rate); |
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[de94a60] | 260 | void ^?{}(cluster & this); |
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| 261 | |
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| 262 | static inline void ?{} (cluster & this) { this{"Anonymous Cluster", default_preemption()}; } |
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| 263 | static inline void ?{} (cluster & this, Duration preemption_rate) { this{"Anonymous Cluster", preemption_rate}; } |
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[e3fea42] | 264 | static inline void ?{} (cluster & this, const char name[]) { this{name, default_preemption()}; } |
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[de94a60] | 265 | |
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[c7a900a] | 266 | static inline [cluster *&, cluster *& ] __get( cluster & this ) __attribute__((const)) { return this.node.[next, prev]; } |
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[de94a60] | 267 | |
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[0f2c555] | 268 | static inline struct processor * active_processor() { return TL_GET( this_processor ); } // UNSAFE |
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| 269 | static inline struct cluster * active_cluster () { return TL_GET( this_processor )->cltr; } |
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[d4e68a6] | 270 | |
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[038be32] | 271 | #if !defined(__CFA_NO_STATISTICS__) |
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| 272 | static inline void print_stats_at_exit( cluster & this ) { |
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| 273 | this.print_stats = true; |
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| 274 | } |
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| 275 | #endif |
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| 276 | |
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[8118303] | 277 | // Local Variables: // |
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[6b0b624] | 278 | // mode: c // |
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| 279 | // tab-width: 4 // |
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[8118303] | 280 | // End: // |
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