Should I write a conference proceeding of my master's thesis work so far? I'll be attending to a conference and do a poster presentation of my master's thesis work so far. What I'm concerned of is that my tutor wants me to also wirte a short report to be submitted as a conference proceeding. 

What I've done so far is nothing new. I've just applied already existing theory and numerical codes to specific cases... which should be easy to do for people that already understands the topic and has technical expertise with the numerical code I'm using (I know there is people that do have it).

Should I just write the report or talk it with my tutor?
Generally speaking, when you submit a poster to a conference you have an auxiliary, small (typically 4 pages), paper that puts what is said in the poster in a more formal and verbal way. This is due to the majority of conferences does not compile the posters in proceedings, but only papers. 

So, when writing a short paper you mostly have to focus on your positional view: giving a summary of what you did until now, what you expect to do, and what will be the outcomes of your research.