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Thread: help to analyse bootchart & dmesg output to reduce boot time

  1. #1
    Join Date
    Jul 2010
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    solapur , india
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    82
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    Ubuntu 14.04 Trusty Tahr

    Question help to analyse bootchart & dmesg output to reduce boot time

    Hello community members.
    I have hp-pavilion g series with 4gb ram & amd quad core processor. i am multibooting with ubuntu, kde , linux mint & win 7 (can't remember when i booted it last time). The problem i am facing that is very long boot ( about 85 secs & 105 sec from pressing on switch& choosing user account). I googled forum for its solution but i am confused with applying those solution since they are for specific problem of their system. I am posting dmesg & bootchart output. Please help me to find what making so much to boot.
    Thanks in advance.
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  2. #2
    Join Date
    Feb 2007
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    West Hills CA
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    9,256
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    Ubuntu 14.04 Trusty Tahr

    Re: help to analyse bootchart & dmesg output to reduce boot time

    Can't read your bootchart. Try using pastebin so that we can see the original resolution of the chart.

    Basically, look for the processes that have long bars and lots of IO (hard disk access) and IO-Waits. The ideal boot chart would have high CPU and high disk IO compressed to the left as much as possible. Areas where both CPU and disk are low are slack areas that just waste boot up time--those are the areas to focus on for speed up.
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  3. #3
    Join Date
    Jun 2009
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    Chicago Suburbs
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    Hidden!
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    Ubuntu 14.04 Trusty Tahr

    Re: help to analyse bootchart & dmesg output to reduce boot time

    The entries in your dmesg are these:

    [ 7.593624] EXT4-fs (sda8): mounted filesystem with ordered data mode. Opts: (null)
    [ 10.208231] usb 6-1: USB disconnect, device number 2
    [ 27.685440] Adding 4881404k swap on /dev/sda6. Priority:-1 extents:1 across:4881404k
    ...

    [ 51.005864] [fglrx] Reserved FB block: Unshared offset:1fff4000, size:c000
    [ 2105.772605] r8169 0000:03:00.0: PME# enabled
    Do you have a USB flash drive (USB6-1?) or other device plugged in?

    But the main issue the r8169 driver? Is that correctly installed? Or is it the entry before which is your fglrx driver?
    For info on UEFI boot install & repair - Updated Mar 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  4. #4
    Join Date
    Jul 2010
    Location
    solapur , india
    Beans
    82
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: help to analyse bootchart & dmesg output to reduce boot time

    Thanks for reply.
    Bootchart--- http://www.freefilehosting.net/linux...ise-20130408-4
    I have no usb flash or any other usb device connected during boot. & i have ATI/AMD FGLRX DRIVER installed.
    Last edited by chinmay3; April 8th, 2013 at 05:37 PM.

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