Add a rudimentary test to run through all the available counters on a

system and then execute a program with pmcstat in counting mode.

The program will verify that all counters fire and that the code neither
panics the system nor locks it up.  This should be considered a first pass
conformance test for new sets of counters being added to hwpmc(4).

tools/test/hwpmc/pmctest.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+# Copyright (c) 2012, Neville-Neil Consulting
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#
+# Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# Neither the name of Neville-Neil Consulting nor the names of its 
+# contributors may be used to endorse or promote products derived from 
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Author: George V. Neville-Neil
+#
+# $FreeBSD$
+
+# Description: A program to run a simple program against every available
+# pmc counter present in a system.
+#
+# To use:
+#
+# pmctest.py ls > /dev/null
+#
+# This should result in ls being run with every available counter
+# and the system should neither lock up nor panic.
+
+import sys
+import subprocess
+from subprocess import PIPE
+
+# A list of strings that are not really counters, just
+# name tags that are output by pmccontrol -L
+notcounter = ["IAF", "IAP", "TSC", "UNC", "UCF"]
+
+def main():
+
+    if (len(sys.argv) != 2):
+        print ("usage: pmctest.py program")
+
+    program = sys.argv[1]
+
+    p = subprocess.Popen(["pmccontrol", "-L"], stdout=PIPE)
+    counters = p.communicate()[0]
+
+    if len(counters) <= 0:
+        print "no counters found"
+        sys.exit()
+
+    for counter in counters.split():
+        if counter in notcounter:
+            continue
+        p = subprocess.Popen(["pmcstat", "-p", counter, program], stdout=PIPE)
+        result = p.communicate()[0]
+        print result
+
+# The canonical way to make a python module into a script.
+# Remove if unnecessary.
+ 
+if __name__ == "__main__":
+    main()