Heatmap

TL; DR: damo report heatmap has recently advanced to support modern DAMON features including age tracking, snapshots, page level monitoring, and monitoring intervals auto-tuning. It will help users intuitively understand the monitored access patterns at a glance. DAMON in The Past: Full Recording based Monitoring At the beginning, DAMON was providing only the access frequency of each memory region in real time. Hence heatmap visualization, which shows the access frequency of each memory area in the timeline was the first and one of the best ways to see the access pattern....

TL; DR: try --draw_range all option of damo report heatmap if it shows not what you expected. --interactive_edit option can also be helpful, like below. Problem: Scoping of Huge Time/Space damo report heatmap outputs sometimes show no expected access pattern. It is sometimes just entirely black, or shows some access pattern but not what the user expected. This post is for explaining the reason and how you can work around....

I just made a DAMON logo using DAMON, like below. $ git clone https://github.com/sjp38/masim && cd masim $ cat damon_pixel_2 11111111 11 11 111111 11111111 11 11 11111111 11111111 1111 11111111 11111111 11 11 11111111 11111111 1111 11111111 $ ./pixels_to_access_config.py ./damon_pixel_2 $((100*1024*1024)) 300 damon.cfg $ sudo damo record "./masim ./configs/stairs.cfg" $ sudo damo report heatmap --output damon.png The output is below: The cropped one: