[haiku-development] Re: Do optional packages need to include everything they do?
- From: "Michael Lotz" <mmlr@xxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Mon, 31 Aug 2009 16:42:17
Hi Stephan
> Ok, I am measured the speed of certain stages (MM:SS):
>
> * time to rocket icon lighting up: 00:15
Mostly burst read of the tgz boot archive, unzipping and running stuff
from memory, some loading of additional modules after finding boot
volume, so not problematic.
> * time from rocket item lighting up to blue desktop 04:10 (!)
Bootscript running, loading up some servers that are necessary and some
that aren't. You won't get around the registrar, app_server and input_
server. These load the servers, the libraries they use and cause modules
to get loaded (graphics, input drivers). And there is also syslog_
daemon, debug_server and net_server, which aren't necessary for the
installer. If you remove these, or rather move these past the
invokation of the CD bootscript, you should see quite a drop there.
Note that the net_server is launched before the app_server right now.
> * time to alert 00:16
That should be mostly only the input_server starting up, as that one is
launched by the app_server, so possibly after the blue desktop becomes
visible.
> * time to Installer note 00:38
That should really only be the Installer loading plus any additional
library not in memory by now.
> * time to Installer main window 00:14
I wouldn't really know why this takes so long, maybe scanning disks and
loading of the corresponding modules delays this one.
> I have an idea how I can optimize some of these...
You can't really except for (re-)moving the non-necessary servers.
Maybe reducing parallel access could help, but really after the app_
server launch there shouldn't really be too much parallel going on. I'm
currently looking through the kernel to check a few problematic places
(i.e. where large reads are split up into page wise reads).
Regards
Michael
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