[nyanpasu64]

How do you gather profiling information for kernel function calls from a user program?

[qsantos]

I'll write an article on the flamegraphs specifically, but to get the data, just follow Julia's article!

https://jvns.ca/blog/2017/03/19/getting-started-with-ftrace/

[ismaildonmez]

Could you clarify how are you testing the speed of the first example where you are not writing anything to stdout? Thanks.

[qsantos]

For the first Rust program, where I just write to memory, I just use the time utility when running the program from zsh. Then, I divide the number of bytes written by the number of seconds elapsed. That's why it's not an infinite loop ;)

[ismaildonmez]

Thanks!