liboffloadmic/runtime/offload_orsl.cpp

   1 /*
   2     Copyright (c) 2014-2016 Intel Corporation.  All Rights Reserved.
   3
   4     Redistribution and use in source and binary forms, with or without
   5     modification, are permitted provided that the following conditions
   6     are met:
   7
   8       * Redistributions of source code must retain the above copyright
   9         notice, this list of conditions and the following disclaimer.
  10       * Redistributions in binary form must reproduce the above copyright
  11         notice, this list of conditions and the following disclaimer in the
  12         documentation and/or other materials provided with the distribution.
  13       * Neither the name of Intel Corporation nor the names of its
  14         contributors may be used to endorse or promote products derived
  15         from this software without specific prior written permission.
  16
  17     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20     A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23     LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 */
  29
  30
  31 #include "offload_orsl.h"
  32 #include <stdlib.h>
  33 #include "offload_host.h"
  34 #include "orsl-lite/include/orsl-lite.h"
  35
  36 namespace ORSL {
  37
  38 static bool            is_enabled = false;
  39 static const ORSLTag   my_tag = (const ORSLTag) "Offload";
  40
  41 void init()
  42 {
  43     const char *env_var = getenv("OFFLOAD_ENABLE_ORSL");
  44     if (env_var != 0 && *env_var != '\0') {
  45         int64_t new_val;
  46         if (__offload_parse_int_string(env_var, new_val)) {
  47             is_enabled = new_val;
  48         }
  49         else {
  50             LIBOFFLOAD_ERROR(c_invalid_env_var_int_value,
  51                              "OFFLOAD_ENABLE_ORSL");
  52         }
  53     }
  54
  55     if (is_enabled) {
  56         OFFLOAD_DEBUG_TRACE(2, "ORSL is enabled\n");
  57     }
  58     else {
  59         OFFLOAD_DEBUG_TRACE(2, "ORSL is disabled\n");
  60     }
  61 }
  62
  63 bool reserve(int device)
  64 {
  65     if (is_enabled) {
  66         int pnum = mic_engines[device].get_physical_index();
  67         ORSLBusySet bset;
  68
  69         bset.type = BUSY_SET_FULL;
  70         if (ORSLReserve(1, &pnum, &bset, my_tag) != 0) {
  71             return false;
  72         }
  73     }
  74     return true;
  75 }
  76
  77 bool try_reserve(int device)
  78 {
  79     if (is_enabled) {
  80         int pnum = mic_engines[device].get_physical_index();
  81         ORSLBusySet bset;
  82
  83         bset.type = BUSY_SET_FULL;
  84         if (ORSLTryReserve(1, &pnum, &bset, my_tag) != 0) {
  85             return false;
  86         }
  87     }
  88     return true;
  89 }
  90
  91 void release(int device)
  92 {
  93     if (is_enabled) {
  94         int pnum = mic_engines[device].get_physical_index();
  95         ORSLBusySet bset;
  96
  97         bset.type = BUSY_SET_FULL;
  98         if (ORSLRelease(1, &pnum, &bset, my_tag) != 0) {
  99             // should never get here
 100         }
 101     }
 102 }
 103
 104 } // namespace ORSL