Ubuntu boot time on imac
in [Kernel]
|
Prev: ieee1394: schedule for removal
Next: alpha: Implement HW performance events on the EV67 and later CPUs.
From: Chriss Kalogeropoulos on 24 May 2010 17:40 Hi all, I have also posted this on ubuntu forums hoping for an answer but i believe this is the right place i have a 24'' imac core duo 2 (2007 model), 4GB ram, nvidia 7600 I recently installed ubuntu lucid 64 bit and everything worked perfectly. The boot times where 14.5 secs on a clean installation from grub to full desktop. I even enabled the xorg-edgers repo and nouveau with 3d was working almost perfectly. The boot time was around 20-23 secs with compiz enabled and 2.6.34-2 kernel installed from xorg-edgers. What i tried next was to manually compile the 2.6.34 kernel and statically link all drivers, to improve performance and boot time a bit. This also worked fine and the system works ok. However, i did not see any improvements during boot (around 20 secs) and there is a huge gap of 10 second from the time the kernel initializes usb until udev is started. The logs are completely empty. The build has only the necessary drivers. Can someone explain what is happening and if there is a way to improve on that ? Are there any kernel options or tools i can use to get more info on what is happening during this period ? I attach my kernel config, a dmesg log and the boot chart png Please cc me since i am not on the list Thanks in advance
From: Justin P. Mattock on 24 May 2010 18:10
On 05/24/2010 02:33 PM, Chriss Kalogeropoulos wrote: > Hi all, > > I have also posted this on ubuntu forums hoping for an answer but i > believe this is the right place > > i have a 24'' imac core duo 2 (2007 model), 4GB ram, nvidia 7600 > > I recently installed ubuntu lucid 64 bit and everything worked > perfectly. The boot times where 14.5 secs on a clean installation from > grub to full desktop. I even enabled the xorg-edgers repo and nouveau > with 3d was working almost perfectly. The boot time was around 20-23 > secs with compiz enabled and 2.6.34-2 kernel installed from xorg-edgers. > > What i tried next was to manually compile the 2.6.34 kernel and > statically link all drivers, to improve performance and boot time a bit. > This also worked fine and the system works ok. > > However, i did not see any improvements during boot (around 20 secs) and > there is a huge gap of 10 second from the time the kernel initializes > usb until udev is started. The logs are completely empty. > > The build has only the necessary drivers. Can someone explain what is > happening and if there is a way to improve on that ? > Are there any kernel options or tools i can use to get more info on what > is happening during this period ? > > I attach my kernel config, a dmesg log and the boot chart png > > Please cc me since i am not on the list > > Thanks in advance > > > had the something similar(15 sec pause during boot) ended up being(for me at-least) in /lib/udev/write_net_rules, removing this get a smooth boot, but there were other caseses that this was not the case(instead was something in /etc/udev/*) to debug add a --debug when starting udev i.g. udev --debug etc...(should show info on screen) Justin P. Mattock -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |