e4rat - reduce boot time (into X) by some 50% for ext4

swanson · 2011-08-20 20:48:52

Well, for one thing different kernel files and for example nvidia driver files are loaded for different kernels. Other files are the same so I might try just adding e4rat-preload and see what happens.

triplesquarednine · 2011-08-20 21:02:58

swanson wrote:

Well, for one thing different kernel files and for example nvidia driver files are loaded for different kernels. Other files are the same so I might try just adding e4rat-preload and see what happens.

what should happen, is that e4rat will work, and you won't be able to see any real measurable difference between the kernel that you setup e4rat with vs. your other kernels. ~ this is the case for me anyway.

swanson · 2011-08-21 02:55:30

Sounds great!

triplesquarednine · 2011-08-21 03:17:39

swanson wrote:

Sounds great!

That's what i thought, when i tested out the theory

I think in the case of the kernel and/or nvidia driver ~ they aren't the files that e4rat is going to give a big reduction in boot time. I think it tends to be the other stuff (like DE/WM , applications, etc) that will benefit the most. At least that is my own observation, from using e4rat on a couple Archlinux installs now, amongst different kernels, and the like.

Saint0fCloud · 2011-08-22 14:16:26

corruptz0r wrote:

I am having trouble getting e4rat-collect to create startup.log.
I added init=/sbin/e4rat-collect to my grub bootup, and dmesg says (verbose 31):
<snip>
I am on kernel 3.0.1-ck with auditing and system-call auditing enabled.
Edit: anyone, please? I still can't find a solution and have spent an entire day sifting through logs and documentation. No joy.

Check your kernel config again cause it sounds like you don't have AUDITSYSCALL enabled.

Labello · 2011-08-29 10:17:11

https://wiki.archlinux.de/title/E4rat

I translated the wiki entry to german

bernarcher · 2011-08-29 12:05:30

Labello wrote:

https://wiki.archlinux.de/title/E4rat
I translated the wiki entry to german

Das sieht echt gut aus!

Looks really good. Thanks for your efforts.

nierro · 2011-09-02 19:43:13

On my laptop, I gained something like 8-9 seconds on bootup...but may be because I had already optimize it!
But now chromium, lxterminal, audacious, pidgin and mplayer starts just in 1 second or so...even together!very nice!
But I'm having a strange problem, just to boot ago: in gnome3 wallpaper it's black or ruined, I don't understand why...may be is something that will fix alone...I'll see!
Anyway...Great job!!!
Thanks

dodo3773 · 2011-09-05 19:29:50

Shaved about 60% off my boot time. I am amazed. I had to change all of my sleep timeouts in my startup scripts. Thanks for this toad.

b9anders · 2011-09-15 00:54:49

finally got around to trying this out. I didn't notice much difference in boottime from grub to lxdm. Where it really takes off though is from lxdm to all my regular apps up and running. The difference is very noticeable! All my regular apps are incredibly snappy, the GIMP actually loads instantly now. Great app, thanks for sharing.

Labello · 2011-09-15 12:05:06

suspending stopped working for me... which worked flawlessly on my ibm t23 until i started using e4rat. but well... since sound stopped working after resuming from suspend and it took almost as long as a cold reboot with e4rat I do not care that much.

Unia · 2011-09-24 19:18:20

Could it be that after a while you have to run e4rat-collect again? I think my boot-up is going slower again :\

toad · 2011-09-25 06:15:33

No, not really. But you do have to run it again after major changes to your boot procedure.

Unia · 2011-09-25 11:41:33

Can/will it harm my system if I run it again? Also, do I have to run it for each kernel I use? Recently switched to linux-ck

ying · 2011-09-25 19:59:39

You should try out readahead-fedora.

Unia · 2011-09-25 20:04:30

ying wrote:

You should try out readahead-fedora.

Looks good, but also much harder to set up. E4at is just simple and works too, although I think it feels its slowing down.. :\

MrCode · 2011-09-25 22:10:59

Can/will it harm my system if I run it again? Also, do I have to run it for each kernel I use? Recently switched to linux-ck

I just ran it again on both my systems recently, and it seemed to speed things back up a bit…didn't harm anything from what I can tell.

…and AFAIK the only thing you'll have to do to use e4rat-preload with a different kernel is just change the init= in the kernel line in your GRUB config.

Last edited by MrCode (2011-09-25 22:11:59)

Mogger · 2011-09-26 11:51:25

JimmySJ84 wrote:

Hi,
Can I use e4rat if I have the /boot partition on ext2? everything else is on ext4.
Salvo

Have you tried it yet? Although Weegee said that it works, it would be nice to hear more success stories before I try it on my netbook (similar to your setup: everything on ext4 except /boot on ext2).

ying · 2011-09-27 08:55:37

Unia wrote:

ying wrote:
You should try out readahead-fedora.
Looks good, but also much harder to set up. E4at is just simple and works too, although I think it feels its slowing down.. :\

Haha you are joking! Just do a yaourt -S readahead-fedora and two reboots. That is it. And the good thing of readahead-fedora is, that it can be used on every kind of file system and it has ssd support.

Mogger · 2011-10-12 01:21:07

Mogger wrote:

JimmySJ84 wrote:
Hi,
Can I use e4rat if I have the /boot partition on ext2? everything else is on ext4.
Salvo
Have you tried it yet? Although Weegee said that it works, it would be nice to hear more success stories before I try it on my netbook (similar to your setup: everything on ext4 except /boot on ext2).

I can answer this now - yes, it works just fine. I gained ~8 s with e4rat, but my boot to the graphical desktop (KDE) is still too slow, around 1.30 minutes. It seems to have gotten even slower now than before - I have a record of 1.22 without anything and 1.17 with readahead-list.

toad · 2011-10-12 05:09:06

ying wrote:

Unia wrote:
ying wrote:
You should try out readahead-fedora.
Looks good, but also much harder to set up. E4at is just simple and works too, although I think it feels its slowing down.. :\
Haha you are joking! Just do a yaourt -S readahead-fedora and two reboots. That is it. And the good thing of readahead-fedora is, that it can be used on every kind of file system and it has ssd support.

This made me try readahead-fedora but it simply doesn't work for me. I gained absolutely no improvement in boot time on my desktop. Haven't tried e4rat on it yet either, mind.

claudecat · 2012-02-05 04:22:16

Just wanted to give a plug to e4rat, which can dramatically speed up your boot time. Shaved 12 seconds off mine... now at 21 seconds from grub to fully loaded KDE with Firefox open. Arch loads faster than my Macpup hd install! Easy to implement and available with a simple pacman -S e4rat.

fsckd · 2012-02-05 04:32:26

mod action: Merged in claudecat's thread from Newbie Corner; title was "e4rat - get it! use it!".

bwat47 · 2012-02-05 18:35:26

I suggest anyone using this use e4rat-preload-lite from the aur. It massivley decreases the time it takes to preload the files during boot.

I'm getting about 17 seconds to usable kde desktop on a 5400rpm drive with this, just awesome

blackout23 · 2012-02-26 16:11:54

bwat47 wrote:

I suggest anyone using this use e4rat-preload-lite from the aur. It massivley decreases the time it takes to preload the files during boot.
I'm getting about 17 seconds to usable kde desktop on a 5400rpm drive with this, just awesome

I tried the lite version. It saved some seconds indeed. With normal preload it takes awfully long to preload the files which nullifies any speed advantage
I get for the rest of the boot process. I'm timing from Syslinux to GDM login screen which makes it easy to get an accurate numbers.
Normally it takes 38 seconds on my laptop (5400 rpm harddrive 6 years old) now it takes 33. With the old preload it took 37 seconds.
Sysvinit was just as fast as systemd which I'm using now. Appending "quiet" to the kernel line for less output didn't give me any speed boosts.

Man I feel silly sitting infront of my laptop with a stopwatch lol.

Arch Linux

#201 2011-08-20 20:48:52

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#202 2011-08-20 21:02:58

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#203 2011-08-21 02:55:30

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#204 2011-08-21 03:17:39

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#205 2011-08-22 14:16:26

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#206 2011-08-29 10:17:11

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#207 2011-08-29 12:05:30

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#208 2011-09-02 19:43:13

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#209 2011-09-05 19:29:50

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#210 2011-09-15 00:54:49

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#211 2011-09-15 12:05:06

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#212 2011-09-24 19:18:20

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#213 2011-09-25 06:15:33

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#214 2011-09-25 11:41:33

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#215 2011-09-25 19:59:39

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#216 2011-09-25 20:04:30

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#217 2011-09-25 22:10:59

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#218 2011-09-26 11:51:25

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#219 2011-09-27 08:55:37

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#220 2011-10-12 01:21:07

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#221 2011-10-12 05:09:06

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#222 2012-02-05 04:22:16

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#223 2012-02-05 04:32:26

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#224 2012-02-05 18:35:26

Re: e4rat - reduce boot time (into X) by some 50% for ext4

#225 2012-02-26 16:11:54

Re: e4rat - reduce boot time (into X) by some 50% for ext4

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