1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*-
* BSD LICENSE
*
* Copyright(c) 2015 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Some portions of this software is derived from the
* https://github.com/halayli/lthread which carrys the following license.
*
* Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef LTHREAD_SCHED_H_
#define LTHREAD_SCHED_H_
#include "lthread_int.h"
#include "lthread_queue.h"
#include "lthread_objcache.h"
#include "lthread_diag.h"
#include "ctx.h"
/*
* insert an lthread into a queue
*/
static inline void
_ready_queue_insert(struct lthread_sched *sched, struct lthread *lt)
{
if (sched == THIS_SCHED)
_lthread_queue_insert_sp((THIS_SCHED)->ready, lt);
else
_lthread_queue_insert_mp(sched->pready, lt);
}
/*
* remove an lthread from a queue
*/
static inline struct lthread *_ready_queue_remove(struct lthread_queue *q)
{
return _lthread_queue_remove(q);
}
/**
* Return true if the ready queue is empty
*/
static inline int _ready_queue_empty(struct lthread_queue *q)
{
return _lthread_queue_empty(q);
}
static inline uint64_t _sched_now(void)
{
uint64_t now = rte_rdtsc();
if (now > (THIS_SCHED)->birth)
return now - (THIS_SCHED)->birth;
if (now < (THIS_SCHED)->birth)
return (THIS_SCHED)->birth - now;
/* never return 0 because this means sleep forever */
return 1;
}
static inline void
_affinitize(void) __attribute__ ((always_inline));
static inline void
_affinitize(void)
{
struct lthread *lt = THIS_LTHREAD;
DIAG_EVENT(lt, LT_DIAG_LTHREAD_SUSPENDED, 0, 0);
ctx_switch(&(THIS_SCHED)->ctx, <->ctx);
}
static inline void
_suspend(void) __attribute__ ((always_inline));
static inline void
_suspend(void)
{
struct lthread *lt = THIS_LTHREAD;
(THIS_SCHED)->nb_blocked_threads++;
DIAG_EVENT(lt, LT_DIAG_LTHREAD_SUSPENDED, 0, 0);
ctx_switch(&(THIS_SCHED)->ctx, <->ctx);
(THIS_SCHED)->nb_blocked_threads--;
}
static inline void
_reschedule(void) __attribute__ ((always_inline));
static inline void
_reschedule(void)
{
struct lthread *lt = THIS_LTHREAD;
DIAG_EVENT(lt, LT_DIAG_LTHREAD_RESCHEDULED, 0, 0);
_ready_queue_insert(THIS_SCHED, lt);
ctx_switch(&(THIS_SCHED)->ctx, <->ctx);
}
extern struct lthread_sched *schedcore[];
void _sched_timer_cb(struct rte_timer *tim, void *arg);
void _sched_shutdown(__rte_unused void *arg);
#endif /* LTHREAD_SCHED_H_ */
|
