Kernel 10 Warp Tiling: the current constraints are not enough

[bssrdf]

I think for kernel 10 (warp tiling), additional constraints for block parameters may be needed:

  const uint K10_NUM_THREADS = 128;
  const uint K10_BN = 256;
  const uint K10_BM = 128;
  const uint K10_BK = 8;
  const uint K10_WN = 256;
  const uint K10_WM = 32;
  const uint K10_WNITER = 1;
  const uint K10_TN = 4;
  const uint K10_TM = 8;

The above combination does not cause compiler error but failed at run time with matrix size 256.

changing to

  const uint K10_TN = 8;
  const uint K10_TM = 4;

the kernel worked.

I think the constraint (K10_WM / K10_WMITER) % TM == 0 && (K10_WN / K10_WNITER) % TN == 0 is needed unless the code changes to accommodate the situation.