[C-API]需要一个GPU的运行示例 #6389
Description
目前CAPI中的demo没有直接给出gpu运行的示例，如果将dense目录下的直接改成：
// Initalize Paddle
char* argv[] = {"--use_gpu=True"};
CHECK(paddle_init(1, (char**)argv));
// Reading config binary file. It is generated by `convert_protobin.sh`
long size;
void* buf = read_config(CONFIG_BIN, &size);
// Create a gradient machine for inference.
paddle_gradient_machine machine;
CHECK(paddle_gradient_machine_create_for_inference(&machine, buf, (int)size));
CHECK(paddle_gradient_machine_randomize_param(machine));
// Loading parameter. Uncomment the following line and change the directory.
// CHECK(paddle_gradient_machine_load_parameter_from_disk(machine,
// "./some_where_to_params"));
paddle_arguments in_args = paddle_arguments_create_none();
// There is only one input of this network.
CHECK(paddle_arguments_resize(in_args, 1));
// Create input matrix.
paddle_matrix mat = paddle_matrix_create(/* sample_num */ 1,
/* size */ 784,
/* useGPU */ true);
运行会出问题：
Prob:
*** Aborted at 1512642274 (unix time) try "date -d @1512642274" if you are using GNU date ***
PC: @ 0x0 (unknown)
*** SIGSEGV (@0x33048a1a00) received by PID 17009 (TID 0x7f6c5f37b8c0) from PID 76159488; stack trace: ***
@ 0x7f6c5de65470 (unknown)
@ 0x4017ae main
@ 0x7f6c5de51bd5 __libc_start_main
@ 0x401209 (unknown)
@ 0x0 (unknown)