[Mageia-dev] Debugging boot times

Wed Nov 9 00:55:49 CET 2011

'Twas brillig, and Colin Guthrie at 08/11/11 23:48 did gyre and gimble:
+> Hi,
+> 
+> I've just pushed bootchart to the build system.
+> 
+> If you want to get a nice log of how things work, just install
+> bootchart-daemon and then boot with the kernel command line:
+> 
+> init=/sbin/bootchartd
+> 
+> If you normally need init=/bin/systemd, then use instead:
+> 
+> init=/sbin/bootchartd bootchart_init=/bin/systemd
+> 
+> 
+> Once you've booted, you can analyse the chart info via running
+> "bootchart". This will create a bootchart.png file which we can then use
+> to help diagnose problems etc.
+> 
+> At the moment on my system, waiting for network-up is causing some
+> slowdowns for example. I don't need the network to be up to be able to
+> login (on my system) and thus I'd rather display gdm sooner rather than
+> wait. Useful stuff.
+
+Incidentally, this will only work for stuff that is done post initrd.
+There is also a dracut module to enable bootchart inside the initrd, but
+I've not played with that nor know how to enable it (if you even need to
+enable it - perhaps it just works - like I say, I've not looked)
+
+Col
+
+
+-- 
+
+Colin Guthrie
+colin(at)mageia.org
+http://colin.guthr.ie/
+
+Day Job:
+  Tribalogic Limited http://www.tribalogic.net/
+Open Source:
+  Mageia Contributor http://www.mageia.org/
+  PulseAudio Hacker http://www.pulseaudio.org/
+  Trac Hacker http://trac.edgewall.org/
+