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#include "common.h"
#include <stdio.h>
#include <stdlib.h>
#define MQ_BUFSIZE 128
typedef enum
{
MQ_WAIT_FOR_EVENTS,
MQ_FINISH
} WaitType;
void write_read_test(cl_context ctx, cl_device_id dev, cl_command_queue cq1,
cl_command_queue cq2, WaitType wait_type, char* test_name)
{
// Variables
cl_int err;
cl_float* buf_host1A = (cl_float*)malloc(MQ_BUFSIZE * sizeof(cl_float));
cl_float* buf_host1B = (cl_float*)calloc(MQ_BUFSIZE, sizeof(cl_float));
cl_mem buf_dev1 = NULL;
cl_int* buf_host2A = (cl_int*)malloc(MQ_BUFSIZE * sizeof(cl_int));
cl_int* buf_host2B = (cl_int*)calloc(MQ_BUFSIZE, sizeof(cl_int));
cl_mem buf_dev2 = NULL;
cl_event ew[2] = {NULL, NULL}, er[2] = {NULL, NULL};
cl_uint i;
// Fill host buffers with random data
for (i = 0; i < MQ_BUFSIZE; i++)
{
buf_host1A[i] = rand() / (cl_float)RAND_MAX;
buf_host2A[i] = (cl_int)rand();
}
// Create device buffers
buf_dev1 = clCreateBuffer(ctx, CL_MEM_READ_WRITE,
MQ_BUFSIZE * sizeof(cl_float), NULL, &err);
checkError(err, "creating device buffer 1");
buf_dev2 = clCreateBuffer(ctx, CL_MEM_READ_WRITE, MQ_BUFSIZE * sizeof(cl_int),
NULL, &err);
checkError(err, "creating device buffer 2");
// Write something to device buffer 1 using command queue 1,
// generate event ew[0]
err = clEnqueueWriteBuffer(cq1, buf_dev1, CL_FALSE, 0,
MQ_BUFSIZE * sizeof(cl_float), buf_host1A, 0, NULL,
&ew[0]);
checkError(err, "writing to buffer 1");
// Write something to device buffer 2 using command queue 2,
// generate event ew[1]
err = clEnqueueWriteBuffer(cq2, buf_dev2, CL_FALSE, 0,
MQ_BUFSIZE * sizeof(cl_int), buf_host2A, 0, NULL,
&ew[1]);
checkError(err, "writing to buffer 2");
// Read from device buffer 1 using command queue 2, make it depend
// on event ew[0] and generate event er[0]
err = clEnqueueReadBuffer(cq2, buf_dev1, CL_FALSE, 0,
MQ_BUFSIZE * sizeof(cl_float), buf_host1B, 1,
&ew[0], &er[0]);
checkError(err, "reading from buffer 1");
// Read from device buffer 2 using command queue 1, make it depend
// on event ew[1] and generate event er[1]
err =
clEnqueueReadBuffer(cq1, buf_dev2, CL_FALSE, 0, MQ_BUFSIZE * sizeof(cl_int),
buf_host2B, 1, &ew[1], &er[1]);
checkError(err, "reading from buffer 1");
// Wait on host thread for work to finish
switch (wait_type)
{
case MQ_WAIT_FOR_EVENTS:
// Wait on host thread for read events
clWaitForEvents(2, er);
break;
case MQ_FINISH:
// Wait on host thread for queues to be processed
clFinish(cq1);
// If they're not the same queue, must also wait in the second queue
if (cq1 != cq2)
{
clFinish(cq2);
}
break;
default:
fprintf(stderr, "Unknown wait type\n");
exit(1);
}
// Check results
for (i = 0; i < MQ_BUFSIZE; i++)
{
if (buf_host1A[i] != buf_host1B[i] || buf_host2A[i] != buf_host2B[i])
{
fprintf(stderr, "Incorrect results in test %s\n", test_name);
exit(1);
}
}
// If we get here everything is OK
printf("OK\n");
// Release stuff
for (i = 0; i < 2; i++)
{
clReleaseEvent(ew[i]);
clReleaseEvent(er[i]);
}
clReleaseMemObject(buf_dev1);
clReleaseMemObject(buf_dev2);
free(buf_host1A);
free(buf_host1B);
free(buf_host2A);
free(buf_host2B);
}
int main(int argc, char* argv[])
{
///////////
// Setup //
///////////
// Variables
cl_platform_id platf;
cl_context ctx = NULL;
cl_device_id dev;
cl_int err;
cl_command_queue cq1 = NULL, cq2 = NULL, oocq = NULL;
// Initialize PRNG
srand(0);
// Get platform
err = clGetPlatformIDs(1, &platf, NULL);
checkError(err, "getting platform");
// Check its Oclgrind
checkOclgrindPlatform(platf);
// Get first device
err = clGetDeviceIDs(platf, CL_DEVICE_TYPE_ALL, 1, &dev, NULL);
checkError(err, "getting device");
// Create context
ctx = clCreateContext(NULL, 1, &dev, NULL, NULL, &err);
checkError(err, "creating context");
////////////////////////////////
// Test 1: Two command queues //
////////////////////////////////
// Create first command queue
cq1 = clCreateCommandQueue(ctx, dev, 0, &err);
checkError(err, "creating first command queue");
// Create second command queue
cq2 = clCreateCommandQueue(ctx, dev, 0, &err);
checkError(err, "creating second command queue");
// Test 1.1: Perform test with two different command queues and explicitly
// waiting for events
write_read_test(ctx, dev, cq1, cq2, MQ_WAIT_FOR_EVENTS, "test 1.1");
// Test 1.2: Perform test with two different command queues and wait for
// the second queue to finish
write_read_test(ctx, dev, cq1, cq2, MQ_FINISH, "test 1.2");
// Release command queues
clReleaseCommandQueue(cq2);
clReleaseCommandQueue(cq1);
////////////////////////////////////////////
// Test 2: One out-of-order command queue //
////////////////////////////////////////////
// Create an out-of-order command queue
oocq = clCreateCommandQueue(ctx, dev, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE,
&err);
checkError(err, "creating out-of-order command queue");
// Test 2.1: Perform test with out-of-order command queue and explicitly
// waiting for events
write_read_test(ctx, dev, oocq, oocq, MQ_WAIT_FOR_EVENTS, "test 2.1");
// Test 2.2: Perform test with out-of-order command queue and wait for
// queue to finish
write_read_test(ctx, dev, oocq, oocq, MQ_FINISH, "test 2.2");
// Release command queue
clReleaseCommandQueue(oocq);
//////////////
// Clean-up //
//////////////
// Release context
clReleaseContext(ctx);
return 0;
}
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