bootchartd: new applet

Usage: bootchartd start [PROG ARGS]|init|stop

Create /var/log/bootchart.tgz with boot chart data

Options:
start: start background logging; with PROG, run PROG, then kill
logging with USR1
stop: send USR1 to all bootchartd processes
init: start background logging; stop when getty/gdm is seen (for init scripts)
Under PID 1: as init, then exec $bootchart_init, /init, /sbin/init

function                                             old     new   delta
bootchartd_main                                        -     907    +907
dump_procs                                             -     353    +353
packed_usage                                       26566   26735    +169
dump_file                                              -      91     +91
static.dirs                                            -      23     +23
applet_names                                        2176    2187     +11
applet_main                                         1284    1288      +4
applet_nameofs                                       642     644      +2
------------------------------------------------------------------------------
(add/remove: 5/0 grow/shrink: 4/0 up/down: 1560/0)           Total: 1560 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

init/Config.in

@@ -120,4 +120,18 @@ config MESG
 	  Mesg controls access to your terminal by others. It is typically
 	  used to allow or disallow other users to write to your terminal
 
+config BOOTCHARTD
+	bool "bootchartd"
+	default n
+	help
+	  bootchartd is commonly used to profile the boot process
+	  for the purpose of speeding it up. In this case, it is started
+	  by the kernel as the init process. This is configured by adding
+	  the init=/sbin/bootchartd option to the kernel command line.
+
+	  It can also be used to monitor the resource usage of a specific
+	  application or the running system in general. In this case,
+	  bootchartd is started interactively by running bootchartd start
+	  and stopped using bootchartd stop.
+
 endmenu