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Altera_Forum's avatar
Altera_Forum
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8 years ago

Latency of the loop

Would the latency of the below loop be different for switch_loop = 0 and switch_loop =1? The html report generated for the below kernel includes the latency of the global and local memory access. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Replicating the logic results in below kernel. Would the latency of the kernel depend on the conditional statement in this case?

__kernel

__attribute__((task))

void dummy_kernel

(

__global *restrict bottom ,

__local *restrict top,

__global *restrict final,

uchar switch_loop)

{

float private;

if (switch_loop == 0)

{

for (unsigned i = 0; i< 20; i++) {

private = global_memory;

final = private;

}

}

else

{

for (unsigned i = 0; i< 20; i++) {

private = local_memory;

final = private;

}

}

}