configs: add command-line option to stop debug output

This patch adds a --debug-end flag to main.py so that debug output can be
stoped at a specified tick, while allowing the simulation to continue. It is
useful in situations where you would like to produce a trace for a region of
interest while still collecting stats for the entire run. This is in contrast
to the currently existing --debug-break flag, which terminates the simulation
at the tick.

diff --git a/src/python/m5/main.py b/src/python/m5/main.py
index 4b3bf410cec171f40d5868141aea82338787d59f..deb4725ac881de385b990d5098c34bf448942302 100644 (file)
--- a/src/python/m5/main.py
+++ b/src/python/m5/main.py
@@ -103,6 +103,8 @@ def parse_options():
         help="Sets the flags for debug output (-FLAG disables a flag)")
     option("--debug-start", metavar="TICK", type='int',
         help="Start debug output at TICK")
+    option("--debug-end", metavar="TICK", type='int',
+        help="End debug output at TICK")
     option("--debug-file", metavar="FILE", default="cout",
         help="Sets the output file for debug [Default: %default]")
     option("--debug-ignore", metavar="EXPR", action='append', split=':',
@@ -348,6 +350,11 @@ def main(*args):
     else:
         trace.enable()
 
+    if options.debug_end:
+        check_tracing()
+        e = event.create(trace.disable, event.Event.Debug_Enable_Pri)
+        event.mainq.schedule(e, options.debug_end)
+
     trace.output(options.debug_file)
 
     for ignore in options.debug_ignore: