https://github.com/brendangregg/Dump2PNG/wiki
So with the subsecond-offset heat map, you get clustering from one column to the next for events that happen at the same time offset. Which is common with periodic tasks: see the example patterns in the post.
https://github.com/cortesi/scurve
I have a blazing fast command-line version of binvis in Rust that I plan to release in the next month or so. I really need make some time to turn back to this.
So I was more interested in core dumps, which gets tricky since they can be 10s of Gbytes in size. Probably the most useful thing I figured out was this palette type:
x86 grayscale with some (9) color indicators:
green = common english chars: 'e', 't', 'a'
red = common x86 instructions: movl, call, testl
blue = binary values: 0x01, 0x02, 0x03While I'm thinking about it, you're of course quite right that spotting periodic patterns in a Hilbert curve layout is really hard. However, I've found that being able to spot them in a scanning layout is highly dependent on your column width matching/resonating with the period of the pattern you're looking for. Another thing on my todo list is to combine Hilbert layouts with Fourier transforms. There's a very suggestive paper on this that I'd love to explore:
And Brendans blog has been more recently inspiring and educational, seeing you guys chatting on HN is too cool. Thank you both for the awesome and freely accessible material.