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#! /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))
}
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