X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=tags%2Fltt-control-0.51-12082008%2Flttctl%2Fltt-armtap.sh;fp=tags%2Fltt-control-0.51-12082008%2Flttctl%2Fltt-armtap.sh;h=84f91d669b7f8c855d6b02ef8673e3f4864a9d6a;hb=366ebe807eb22cd9480583f12eec527db0498987;hp=0000000000000000000000000000000000000000;hpb=efae29c4ba8f8842e83349a01b29ae5a8e3d721f;p=ltt-control.git

diff --git a/tags/ltt-control-0.51-12082008/lttctl/ltt-armtap.sh b/tags/ltt-control-0.51-12082008/lttctl/ltt-armtap.sh
new file mode 100755
index 0000000..84f91d6
--- /dev/null
+++ b/tags/ltt-control-0.51-12082008/lttctl/ltt-armtap.sh
@@ -0,0 +1,34 @@
+# This script will enable the system-wide tap on the given list of events passed
+# as parameter, and stop the tap at each other "normal rate" events.
+
+#excluding core markers (already connected)
+#excluding locking markers (high traffic)
+
+echo Connecting function markers
+
+# interesting period starts with the list of events passed as parameter.
+START_FTRACE=$*
+
+# interesting period may stop with one specific event, but also try to keep the
+# other START_FTRACE events triggers to the lowest possible overhead by stopping
+# function trace at every other events.
+# Do _not_ disable function tracing in ftrace_entry event unless you really only
+# want the first function entry...
+STOP_FTRACE=`cat /proc/ltt|grep -v %k|awk '{print $2}'|sort -u|grep -v ^core_|grep -v ^locking_|grep -v ^lockdep|grep -v ftrace_entry|grep -v ^tap_`
+
+for a in $START_FTRACE; do
+	STOP_FTRACE=`echo $STOP_FTRACE|sed 's/$a//'`
+done
+
+
+for a in $STOP_FTRACE; do
+	echo Connecting stop $a
+	echo "connect $a ftrace_system_stop" > /proc/ltt
+done
+
+for a in $START_FTRACE; do
+	echo Connecting start $a
+	echo "connect $a ftrace_system_start" > /proc/ltt
+done
+
+