#!/usr/bin/env stap

global starts, reads

probe begin {
	printf("Collecting top NFS reads...\n")
}

probe module("nfs").function("*@fs/nfs/read.c")
{
	starts[probefunc()] = gettimeofday_us()
}
probe module("nfs").function("*@fs/nfs/read.c").return
{
	reads[probefunc()] = gettimeofday_us() - starts[probefunc()] 
}

probe end {
	printf("Collating data...\n");
	foreach (name in reads- limit 20)
		printf("%10d %s\n", reads[name], name)
}