ceph/src/dpdk/examples/performance-thread/common/lthread_timer.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
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   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
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  10  *
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  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
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  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
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  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34
  35 #ifndef LTHREAD_TIMER_H_
  36 #define LTHREAD_TIMER_H_
  37
  38 #include "lthread_int.h"
  39 #include "lthread_sched.h"
  40
  41
  42 static inline uint64_t
  43 _ns_to_clks(uint64_t ns)
  44 {
  45         unsigned __int128 clkns = rte_get_tsc_hz();
  46
  47         clkns *= ns;
  48         clkns /= 1000000000;
  49         return (uint64_t) clkns;
  50 }
  51
  52
  53 static inline void
  54 _timer_start(struct lthread *lt, uint64_t clks)
  55 {
  56         if (clks > 0) {
  57                 DIAG_EVENT(lt, LT_DIAG_LTHREAD_TMR_START, &lt->tim, clks);
  58                 rte_timer_init(&lt->tim);
  59                 rte_timer_reset(&lt->tim,
  60                                 clks,
  61                                 SINGLE,
  62                                 rte_lcore_id(),
  63                                 _sched_timer_cb,
  64                                 (void *)lt);
  65         }
  66 }
  67
  68
  69 static inline void
  70 _timer_stop(struct lthread *lt)
  71 {
  72         if (lt != NULL) {
  73                 DIAG_EVENT(lt, LT_DIAG_LTHREAD_TMR_DELETE, &lt->tim, 0);
  74                 rte_timer_stop(&lt->tim);
  75         }
  76 }
  77
  78
  79 #endif /* LTHREAD_TIMER_H_ */