Visualizing Linux IO with Seekwatcher and blktrace

Seekwatcher is a super cool utility for Linux that allows you to visualize the IO patterns on a running Linux box.

Check out the movies that are on the page.

This is all based on blktrace which is uses debugfs which is available on modern kernels.

I still need to get a vfsstat program like iostat and blktrace which shows files and offset and block length reads. From this I can then compute VFS page cache efficiency.

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