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backend.cpp
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137 lines (107 loc) · 3.49 KB
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/*******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <arrayfire.h>
#include <gtest/gtest.h>
#include <testHelpers.hpp>
#include <af/data.h>
#include <af/dim4.hpp>
#include <af/traits.hpp>
#include <atomic>
#include <string>
#include <thread>
#include <vector>
#include <af/device.h>
using af::dtype_traits;
using af::getAvailableBackends;
using af::setBackend;
using std::string;
using std::vector;
const char* getActiveBackendString(af_backend active) {
switch (active) {
case AF_BACKEND_CPU: return "AF_BACKEND_CPU";
case AF_BACKEND_CUDA: return "AF_BACKEND_CUDA";
case AF_BACKEND_OPENCL: return "AF_BACKEND_OPENCL";
default: return "AF_BACKEND_DEFAULT";
}
}
void testFunction(af_backend expected) {
af_backend activeBackend = (af_backend)0;
af_get_active_backend(&activeBackend);
ASSERT_EQ(expected, activeBackend);
af_array outArray = 0;
dim_t dims[] = {32, 32};
EXPECT_EQ(AF_SUCCESS, af_randu(&outArray, 2, dims, f32));
// Verify backends returned by array and by function are the same
af_backend arrayBackend = (af_backend)0;
af_get_backend_id(&arrayBackend, outArray);
EXPECT_EQ(arrayBackend, activeBackend);
// cleanup
if (outArray != 0) { ASSERT_SUCCESS(af_release_array(outArray)); }
}
void backendTest() {
int backends = getAvailableBackends();
ASSERT_NE(backends, 0);
bool cpu = backends & AF_BACKEND_CPU;
bool cuda = backends & AF_BACKEND_CUDA;
bool opencl = backends & AF_BACKEND_OPENCL;
if (cpu) {
setBackend(AF_BACKEND_CPU);
testFunction(AF_BACKEND_CPU);
}
if (cuda) {
setBackend(AF_BACKEND_CUDA);
testFunction(AF_BACKEND_CUDA);
}
if (opencl) {
setBackend(AF_BACKEND_OPENCL);
testFunction(AF_BACKEND_OPENCL);
}
}
TEST(BACKEND_TEST, Basic) { backendTest(); }
using af::getActiveBackend;
void test_backend(std::atomic<int>& counter, int ntests,
af::Backend default_backend, af::Backend test_backend) {
auto ta_backend = getActiveBackend();
ASSERT_EQ(default_backend, ta_backend);
// Wait until all threads reach this point
counter++;
while (counter < ntests) {}
setBackend(test_backend);
// Wait until all threads reach this point
counter++;
while (counter < 2 * ntests) {}
ta_backend = getActiveBackend();
ASSERT_EQ(test_backend, ta_backend);
}
TEST(Backend, Threads) {
using std::thread;
std::atomic<int> count(0);
setBackend(AF_BACKEND_DEFAULT);
auto default_backend = getActiveBackend();
int numbk = af::getBackendCount();
thread a, b, c;
if (af::getAvailableBackends() & AF_BACKEND_CPU) {
a = thread([&]() {
test_backend(count, numbk, default_backend, AF_BACKEND_CPU);
});
}
if (af::getAvailableBackends() & AF_BACKEND_OPENCL) {
b = thread([&]() {
test_backend(count, numbk, default_backend, AF_BACKEND_OPENCL);
});
}
if (af::getAvailableBackends() & AF_BACKEND_CUDA) {
c = thread([&]() {
test_backend(count, numbk, default_backend, AF_BACKEND_CUDA);
});
}
if (a.joinable()) a.join();
if (b.joinable()) b.join();
if (c.joinable()) c.join();
}