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Diffstat (limited to 'examples/performance-thread/common/lthread_sched.h')
| -rw-r--r-- | examples/performance-thread/common/lthread_sched.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/examples/performance-thread/common/lthread_sched.h b/examples/performance-thread/common/lthread_sched.h new file mode 100644 index 00000000..4ce56c27 --- /dev/null +++ b/examples/performance-thread/common/lthread_sched.h @@ -0,0 +1,152 @@ +/*- + * 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_ */ |