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Icedrake
Asked: 2011-11-29 15:14:40 +0800 CST

Does the CONCURRENCY=shell tweak work in 11.10? [duplicate]

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Possible Duplicate:
Do newer Ubuntu releases benefit from multicore processors at boot time?

I have a multi-core processor, so I just thought I'd make use of this tweak. But before I do tweak it, I would like to know whether this tweak still works in 11.10?

11.10

2 Answers

  1. Best Answer

    Ubuntu has had a concurrent (specifically, an event based) init daemon in upstart for a number of releases - since Ubuntu 8.04 at least. Most of the boot up process is handled by upstart scripts, and has been since Ubuntu 10.04.

    In short, no. CONCURRENCY=shell doesn't do anything useful anymore.

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  2. You will save a few nanoseconds, because the remaining rc.d style scripts will run simultaneously.

    For example when booting, the system has to run the scripts in /etc/rc2.d directory

    S20kerneloops
S20speech-dispatcher
S20unattended-upgrades
S25bluetooth
S50pulseaudio
S50rsync
S50saned
S70dns-clean
S70pppd-dns
S75sudo
S99acpi-support
S99grub-common
S99ondemand
S99rc.local

    The scripts with the same number in its name will run concurrently, saving a tiny little time.

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