Why uniform buffer is limit to so small in <<Arm GPU Best Practices Developer Guide>>?

Thanks for reply.

I use mali Offline Compiler to analyse the shader, it report the Uniform registers: 128 (200% used)

It means 512 bytes?

Do i need to optimized it to 32?

Desktop gpu seems have 16k SGPR register file. I don't really want the mobile gpu have 16kb uniform, but 128 bit seems too small,

if have 512bytes for only user uniforms, it's not bad.

Thanks for reply.

I use mali Offline Compiler to analyse the shader, it report the Uniform registers: 128 (200% used)

It means 512 bytes?

Do i need to optimized it to 32?

Desktop gpu seems have 16k SGPR register file. I don't really want the mobile gpu have 16kb uniform, but 128 bit seems too small,

if have 512bytes for only user uniforms, it's not bad.

> I use Mali Offline Compiler to analyse the shader, it report the Uniform registers: 128 (200% used)

The "200%" is a bug in the tool - it's off by a factor of 2 and should report 100% used (fixed for the next release due in the Autumn). But yes, 128 registers = 512 bytes. 

There isn't a hard drop in performance if you exceed the uniform register storage, so if you are happy with the performance of your shader then you are probably OK. 

Note that the uniform registers can pack two 16-bit values into a register, so  using mediump/RelaxedPrecision annotation can help reduce uniform register usage.

Thanks.
I feel relaxed now.