Retro68/gcc/liboffloadmic/runtime/offload_orsl.cpp

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/*
Copyright (c) 2014-2016 Intel Corporation. All Rights Reserved.
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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
HOLDER 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.
*/
#include "offload_orsl.h"
#include <stdlib.h>
#include "offload_host.h"
#include "orsl-lite/include/orsl-lite.h"
namespace ORSL {
static bool is_enabled = false;
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static const ORSLTag my_tag = (const ORSLTag) "Offload";
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void init()
{
const char *env_var = getenv("OFFLOAD_ENABLE_ORSL");
if (env_var != 0 && *env_var != '\0') {
int64_t new_val;
if (__offload_parse_int_string(env_var, new_val)) {
is_enabled = new_val;
}
else {
LIBOFFLOAD_ERROR(c_invalid_env_var_int_value,
"OFFLOAD_ENABLE_ORSL");
}
}
if (is_enabled) {
OFFLOAD_DEBUG_TRACE(2, "ORSL is enabled\n");
}
else {
OFFLOAD_DEBUG_TRACE(2, "ORSL is disabled\n");
}
}
bool reserve(int device)
{
if (is_enabled) {
int pnum = mic_engines[device].get_physical_index();
ORSLBusySet bset;
bset.type = BUSY_SET_FULL;
if (ORSLReserve(1, &pnum, &bset, my_tag) != 0) {
return false;
}
}
return true;
}
bool try_reserve(int device)
{
if (is_enabled) {
int pnum = mic_engines[device].get_physical_index();
ORSLBusySet bset;
bset.type = BUSY_SET_FULL;
if (ORSLTryReserve(1, &pnum, &bset, my_tag) != 0) {
return false;
}
}
return true;
}
void release(int device)
{
if (is_enabled) {
int pnum = mic_engines[device].get_physical_index();
ORSLBusySet bset;
bset.type = BUSY_SET_FULL;
if (ORSLRelease(1, &pnum, &bset, my_tag) != 0) {
// should never get here
}
}
}
} // namespace ORSL