Ubuntu 11.04 Boot Performance Compared To Past Releases
Phoronix: Ubuntu 11.04 Boot Performance Compared To Past Releases
Now that we have looked at the Ubuntu power consumption going back as far as Ubuntu 8.04 LTS (and found serious power regressions), the next round of testing is providing the Bootchart results for five different systems also going back as far as Ubuntu 8.04 LTS.
These are not regressions. Software regressions are bugs; these are simply unfortunate side-effects from using a new desktop environment, namely Unity.
Interesting info otherwise, though. Thanks.
how can it be disk throughput is not related to boot performance? anyway...
i have filed a bug report months ago...
and there are many things on the net about crappy disk performance on linux
This is why they should have adopted systemd.
And combined with Gnome3, this is why Red Hat with Fedora 15 has utterly out-engineered Canonical once again.
Michael, you should have linked an older article about how they were targeting a 10s boot time.
On a more serious note, when all laptops boot the same, from Atom to Core2, HDD or SSD, something's not right.
In my opinion, users really wanting fast boot times need to customize their system. A general-towarded distribution will always have useless things (for some users). With a custom kernel, only essential services and a fast SSD my system takes 7s from grub to a full kde4 session.
On a side note, if cpu frequency scaling is enabled (as on most laptops), in my experence boot times will typically double, as the cpu boots in the lowest power state.
I benchmarked my fastest system with a Kanotix 64 stock install onto my new ssd without swap and with 6 gb swap (thats what u would create with auto settings). As it has got 6 gb ram it got that much swap. The differences are realy extreme...
and now with 6 gb swap
it seems that the system waits for the activation of swap. After that test i tried to remove unused services got get an even higher bootspeed. Removing of lvm, cryptsetup, dmraid, mdadm, plymouth gave the hugest boost, the rest only minimal. Well huge is a bit overrated for that system, thats the fastest i got when i tried:
I also noticed that bootchart (1) does not go over 90 mb/s, therefore i tried bootchart2 as well but it did not stop at the right time, it was a bit higher the value first and a bit later it did not stop at all, did not debug that case however. But there i saw thruput rates over 200 mb/s (when it ran too long). When i wanted to benchmark natty the bootchart tool from universe did not track anything, it has got no /sbin/bootchartd there, so in theory it should be activated via the initramfs - at least it looked like that. But i never got profiling data... What was used for natty and how was it activated?
Unity boots faster on 11.04 than classic desktop in 11.04 for me, even after clearing ureadahead to preload the correct environment..
Originally Posted by loonyphoenix
They are regressions , not linked to Unity. Unity is fast and was designed to be light - if anything that is one thing it does do, whatever side you bat from.