Hi, On 2014-09-18 12:18:59 +0000, Andreas Joachim Peters wrote: > > => (src/erasure-code/isa/README claims it needs 16*k byte aligned buffers > > I should update the README since it is misleading ... it should say > 8*k or 16*k byte aligned chunk size depending on the compiler/platform > used, it is not the alignment of the allocated buffer addresses.The > get_alignment in the plug-in function is used to compute the chunk > size for the encoding (as I said not the start address alignment). I've seen that > If you pass k buffers for decoding each buffer should be aligned at > least to 16 or as you pointed out better 32 bytes. ok, that makes sense > For encoding there is normally a single buffer split 'virtually' into > k pieces. To make all pieces starting at an aligned address one needs > to align the chunk size to e.g. 16*k. I don't get that. How is the buffer splitted? into k (+ m) chunk size parts? As long as the start and the length are both 16 (or 32) byte aligned all parts are properly aligned too. I don't see where the k comes into play. cheers Janne -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
