Is it possible to increase the sample rate when profiling go programs?

Question

I have a small program in go that executes most of its code in parallel using go routines. I start CPU profiling as described in the blog on profiling go programs, but when I look at the data I see only 3-5 samples (the actual runtime of the program is several seconds). Is there way to increase the sample rate? Tried googling but couldn't find a thing...

Answer 1

Package runtime

func SetCPUProfileRate

func SetCPUProfileRate(hz int)

SetCPUProfileRate sets the CPU profiling rate to hz samples per second. If hz <= 0, SetCPUProfileRate turns off profiling. If the profiler is on, the rate cannot be changed without first turning it off.

Most clients should use the runtime/pprof package or the testing package's -test.cpuprofile flag instead of calling SetCPUProfileRate directly.