#! /usr/bin/env stap

# Using statistics to examine kernel memory allocations

global kmalloc

probe kernel.function("__kmalloc") { 
	kmalloc <<< $size
}

# Exit after 10 seconds
probe timer.ms(10000) { exit () }

probe end {
	printf("Count:   %d allocations\n", @count(kmalloc))
	printf("Sum:     %d Kbytes\n", @sum(kmalloc)/1000)
	printf("Average: %d bytes\n", @avg(kmalloc))
	printf("Min:     %d bytes\n", @min(kmalloc))
	printf("Max:     %d bytes\n", @max(kmalloc))	
	print("\nAllocations by size in bytes\n")
	print(@hist_log(kmalloc))
}