top-nfstimes.stp


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#!/usr/bin/env stap

global nfscalls write_time

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

probe module("nfs").function("*@fs/nfs/*write.c")
{
	nfscalls[probefunc()] = gettimeofday_us()
}
probe module("nfs").function("*@fs/nfs/*write.c").return
{
	write_time = nfscalls[probefunc()]
	nfscalls[probefunc()] = gettimeofday_us() - write_time
}
/*
probe module("nfs").function("*@fs/nfs/*direct.c")
{
	nfscalls[probefunc()]++
}
probe kernel.function("*@fs/nfs/*pagelist.c") ?,
      module("nfs").function("*@fs/nfs/*pagelist.c") ?
{
	nfscalls[probefunc()]++
}
*/
probe end {
	printf("Collating data...\n");
	foreach (name in nfscalls- limit 50)
		printf("%10d %s\n", nfscalls[name], name)
}