Why the server gives illegal instruction

Everytime when I tried to run the initialization code like in ResNet, the machine just said
Illegal Instruction
The code I tried to run is here:

 for m in self.modules():
             if isinstance(m, nn.Conv2d):
                 n = m.kernel_size[0] * m.kernel_size[1] * m.out_channels
                 m.weight.data.normal_(0, math.sqrt(2. / n))
             elif isinstance(m, nn.BatchNorm2d):

The machine is a Linux server with Centos system. I don’t have the root privelige.
And, when I run torch.randn(2,2), it’s OK. But for torch.randn(4,4) and bigger size, it also says illegal instruction.

Is that all your machine prints out, “Illegal Instruction”?

Yes, that’s all. I don’t know why…