add help for buckets
add help for buckets

rexxars/sse-broadcast-benchmark,rexxars/sse-broadcast-benchmark,rexxars/sse-broadcast-benchmark,rexxars/sse-broadcast-benchmark,rexxars/sse-broadcast-benchmark,rexxars/sse-broadcast-benchmark,rexxars/sse-broadcast-benchmark,rexxars/sse-broadcast-benchmark