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/*
* Linux DTrace
* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
#!/usr/sbin/dtrace -qs
/*
* SYNOPSIS
* sudo ./171provider_io.d
*
* DESCRIPTION
* The io provider can be used to study I/O operations.
* For example, here we print whenever an I/O operation
* is started over the course of ten seconds, reporting
* the device name and whether it is a read or write
* operation. Consult the documentation for more
* information on the probes and their arguments.
*/
BEGIN
{
printf("%10s %2s\n", "DEVICE", "RW");
}
io:::start
{
printf("%10s %2s\n",
args[1]->dev_statname,
args[0]->b_flags & B_READ ? "R" : "W");
}
tick-10s
{
exit(0);
}
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