Once again, things work gets in the way of blogging and so it's been two weeks since my last entry.

We finished off the TechDays in Sao Paulo and then went to Recife in the north of Brazil to do a developer day in conjunction with the Recife Center for Advanced Studies and Systems (CESAR). Recife was very, very warm and needless to say we went out for a dinner at Porcaos when we got there. The next day, we went out for dinner with the people form CESAR which was a very relaxed affair finishing at two in the morning. I had to then be up at 5.30 to catch a flight to Brasilia to present at the DFJUG Kwarup event. This was an unusual presentation from my point of view, since I'd been asked to talk about Ada Lovelace, daughter of Lord Byron and the world's first computer programmer (she wrote an algorithm for Charles Babbage's analytical engine). Not the usual type of thing I present on, but lot's of fun. As usual, after that we all had to go out for dinner and it was again after two in the morning before I got back. Another early start to catch a flight to Rio and I was really beginning to realise that I needed more that 4 hours of sleep a night.

Last week having got back from Brazil I went up to Durham University to talk to one of the professors about software visualisation since we wanted to exchange ideas about project DAVE. There was a comment from my last post that asked for some screen shots of DAVE, so here they are:

This one shows a full graph of a ufs_write call

Since the graphs big we can zoom in and use some colour coding to show the hot paths through the graph based on time spent in each function. We can also see the temporal ordering of the function calls and step though the call sequence.

Even more zoom with time values included in the labels.

We definitely want to make this available to the world, but at the moment we can't quite do that. Since we're using some third party libraries to do the graphing we need to make sure we're squeaky clean from a licensing point of view. If your a Sun employee you can get access here.