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#!/usr/bin/env bpftrace
/*
 * vfsstat	Count some VFS calls, with per-second summaries.
 *		For Linux, uses bpftrace and eBPF.
 *
 * Written as a basic example of counting multiple events and printing a
 * per-second summary.
 *
 * USAGE: vfsstat.bt
 *
 * This is a bpftrace version of the bcc tool of the same name.
 *
 * Copyright 2018 Netflix, Inc.
 * Licensed under the Apache License, Version 2.0 (the "License")
 *
 * 06-Sep-2018	Brendan Gregg	Created this.
 */

BEGIN
{
	printf("Tracing key VFS calls... Hit Ctrl-C to end.\n");

}

kprobe:vfs_read*,
kprobe:vfs_write*,
kprobe:vfs_fsync,
kprobe:vfs_open,
kprobe:vfs_create
{
	@[func] = count();
}

interval:s:1
{
	time();
	print(@);
	clear(@);
}

END
{
	clear(@);
}