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/*
* Oracle 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.
*/
/*
* NAME
* countcalls.d - count the open(), read(), and write() calls for 5 seconds
*
* SYNOPSIS
* sudo dtrace -s countcalls.d
*
* DESCRIPTION
* List and count the calls to write(), read(), and open() executed, while
* the script is running. The script automatically stops after 5 seconds.
*
* NOTES
* - This script uses the profile provider to stop the tracing after a
* certain amount of time. This time can easily be adjusted by changing.
* the number and unit.
*
* - An anonymous aggregation is used to store the results. Like a named
* aggregation, it is automatically printed when the tracing terminates.
*/
/*
* Fires every 5 seconds. Since exit() is called, the tracing terminates
* the first time this probe fires and the clause is executed.
*/
profile:::tick-5sec
{
exit(0);
}
/*
* Create the key by concatenating the function name and a string. An
* alternative is to only use probefunc as a key and print the string as
* part of a printa() in the END probe: printa("%s () calls\n",@);
*/
syscall::write:entry, syscall::read:entry, syscall::open:entry
{
@[strjoin(probefunc,"() calls")] = count();
}
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