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Thanks for the kind offer of the beverage. :-) No reward is required.
I work on this stuff for amusement. :-)
I was wondering why installing bootchart solved the slow boot and slow
resume from hibernate. I got the sources for bootchart. There is a
script installed in the initramfs that runs under init-top called
"bootchart". It sets up a mini file system in /dev, chroots to it, and
starts a program called "collector" which is a compiled C program that
collects statistics on the boot process. (if you want to compile
collector from sources (bootchart-collector.c), you need to use the gcc
parameter -mtune=i386 to get a binary like the one that is installed by
"apt-get install bootchart").
To make a long story short, launching of "collector" cures the slow
boot. I slowly stripped all of the code out of "collector" until there
was nothing left but an infinite "for loop". "for (;;) { ; }" . That
alone was enough to get the boot process to run at top speed. Once the
machine boots, one can see that the "collector" process is taking about
98% of the CPU cycles of at least one of the CPUs, and sometimes both of
them. I just kill the process to not stress the machine.
It appears that "collector" just saturates the CPUs, and this alone is
enough to cure the slow boot problem. Why??? I don't know. I tried
many other short C programs with various looping structures, but only
those that run pretty well flat out, are able to cure the slow boot
process.
--
wakeup from sleep fails on toshiba nb305
https://bugs.launchpad.net/bugs/508516
You received this bug notification because you are a member of Registry
Administrators, which is the registrant for Fedora.
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