Jump to content

  • Log In with Google      Sign In   
  • Create Account

#ActualMJP

Posted 08 December 2012 - 01:50 PM



A warp consists of either 16 or 32 threads grouped together.

I think you mean "32 or 64" Posted Image


I thought a Wavefront on AMDs architecture consists of 16 execution units. Or am I wrong? (I just used warp as a general term, because I like it more Posted Image)


Nah there's 64 threads in a wavefront. In their latest architecture (GCN) the SIMDs are 16-wide, but they execute each instruction 4 times to complete it for the entire wavefront (so a single-cycle instruction actually takes 4 cycles to execute).

#1MJP

Posted 08 December 2012 - 01:49 PM



A warp consists of either 16 or 32 threads grouped together.

I think you mean "32 or 64" Posted Image


I thought a Wavefront on AMDs architecture consists of 16 execution units. Or am I wrong? (I just used warp as a general term, because I like it more Posted Image)


Nah there's 64 threads in a wavefront. In their latest architecture the ALU's are 16-wide, but they execute each instruction 4 times to complete it for the entire wavefront (so a single-cycle instruction actually takes 4 cycles to execute).

PARTNERS