Re: A few observations about systemd

[Tollef Fog Heen <tfheen@err.no>]

]] Russell Coker 

| On Tue, 19 Jul 2011, Bastien ROUCARIES <roucaries.bastien@gmail.com> wrote:
| > > The above is from the ps output of one of my i386 servers running
| > > Squeeze.  It appears that systemd has allocated an extra 2324K of RAM
| > > and has an extra 2712K resident.  Given that it's difficult to buy a
| > > phone with less than 256M of RAM nowadays that doesn't seem to be a big
| > > problem, and systemd can save memory by removing the need to run other
| > > daemons.
| > 
| > I have some avr32 card with 32Mb that are valuable and do measurement
| > over network with blas/lapack. 1Mb is a lot of double. Phone is not
| > the only market.
| 
| How do dpkg and apt-get run on that?

Slowly.

A noop apt-get update takes about 10.5s, one where it updates most of
the Packages files is at closer to six minutes.  This is with / on a SD
card and no swap.

| > pid == 1 is immortal. I should not get unrecoverable signal like
| > sigsegv. I could restart other daemon if needed.
| 
| Jul 19 01:01:47 unstable64 systemd[1]: Caught <SEGV>, dumped core as pid 889.
| Jul 19 01:01:47 unstable64 systemd[1]: Freezing execution
| 
| It's not strictly unrecoverable.  If you run "kill -11 1" then you get the 
| above in syslog.
| 
| But it does result in a system that doesn't work properly.

Well, yes.  If init crashes, stuff generally don't work that well
afterwards. :-)

Cheers,
-- 
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are