Adding just one line in my code slows the GPU.
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hello, my first code was
for i = 1:1000
r=0.8*r+0.2*tanh(A*r+W_in*xc(i+T0)+(0.3)*bias);
end
In the code above,the gpu is faster than cpu but I have to stack 'r' which is (nx1) matrix, so I just adding 'R' on previous code makes the gpu slower than cpu.
R=zeros(n,1000);
for i = 1:1000
r=0.8*r+0.2*tanh(A*r+W_in*xc(i+T0)+(0.3)*bias);
R(:,i)=r;
end
I want to make my code runs fast on gpu than cpu. What should I do??
回答（1 个）
Pre-allocate on the GPU. Also, pre-compute things on the GPU that are easily vectorized and don't depend on r.
R=gpuArray.zeros(n,1000);
r=gpuArray(r);
A-gpuArray(A);
increments = W_in*gpuArray( xc((1:1000)+T0) ) + 0.3*bias;
for i = 1:1000
r=0.8*r+0.2*tanh(A*r+ increments(i));
R(:,i)=r;
end
3 个评论
TAEYOON KIM
2020-2-19
编辑：TAEYOON KIM
2020-2-19
Matt J
2020-2-19
Still, my other recommendations should help...
TAEYOON KIM
2020-2-19
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2020-2-18
2020-2-19
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