Texture Cache and Performance Issue

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi all,

I had a 64 by 64 by 64 dataset.

Previously i was loading this dataset as a slabs of 2D texture 16 at a time and do operation on it.

i.e. load 16 slabs as a 16 2D texture and do operation then load another 16 and so on.

Later i decided to load all the slabs i.e. 64 2D slabs at once and do operation at once.

But i am noticing the performance time increases when i load all the dataset at once as a texture in GPU as compared to the time required when i loaded 16 at a time.

Is this performance lag due to more misses in texture cache?

will loading all the data as 3D texture help me in any way?

Basically i wanted to know how will texture size effects the texture cache?

thank you
miztaken

2

Hi all,

I had a 64 by 64 by 64 dataset.

Previously i was loading this dataset as a slabs of 2D texture 16 at a time and do operation on it.

i.e. load 16 slabs as a 16 2D texture and do operation then load another 16 and so on.

Later i decided to load all the slabs i.e. 64 2D slabs at once and do operation at once.

But i am noticing the performance time increases when i load all the dataset at once as a texture in GPU as compared to the time required when i loaded 16 at a time.

Is this performance lag due to more misses in texture cache?

will loading all the data as 3D texture help me in any way?

Basically i wanted to know how will texture size effects the texture cache?

thank you
miztaken

3

interesting how do oyu index 16 slabs of 2d texture?

4

interesting how do oyu index 16 slabs of 2d texture?

5

Hi there,

i just made a 2D textures for 64 by 64 data.

I made 16 more textures like that.

and i am accessing index by using methods tex2D(tex1,x,y) … for second texture tex2D(tex2,x,y)

Did i answered your question?

is there anything i am doing wrong?

6

Hi there,

i just made a 2D textures for 64 by 64 data.

I made 16 more textures like that.

and i am accessing index by using methods tex2D(tex1,x,y) … for second texture tex2D(tex2,x,y)

Did i answered your question?

is there anything i am doing wrong?

7

you are lucky to address textures by names.

8

you are lucky to address textures by names.

9

what do u mean?

10

what do u mean?

11

if you have index x,y,z how do you transform index to texture name?

12

if you have index x,y,z how do you transform index to texture name?