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Thread: 27 tty's?...

  1. #1

    Default 27 tty's?...

    Hi there!

    do not need it! just one or two...

    Code:
    systemctl
    UNIT                            LOAD   ACTIVE SUB       DESCRIPTION
    proc-sys-f...fmt_misc.automount loaded active waiting   Arbitrary Executable File Format
    sys-device...sound-card0.device loaded active plugged   7 Series/C210 Series Chipset Fam
    sys-device...et-enp4s0f2.device loaded active plugged   RTL8111/8168/8411 PCI Express Gi
    sys-device...-net-wlp9s0.device loaded active plugged   BCM4313 802.11bgn Wireless Netwo
    sys-device...ck-sda-sda1.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda2.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda3.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda4.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda5.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda6.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...0-block-sda.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...0-block-sr0.device loaded active plugged   MATSHITADVD-RAM_UJ8C0
    sys-device...0-tty-ttyS0.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...0-tty-ttyS1.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS10.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS11.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS12.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS13.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS14.device loaded active plugged   /sys/devices/platform/serial8250
    lines 1-20...skipping...
    UNIT                            LOAD   ACTIVE SUB       DESCRIPTION                                                                   
    proc-sys-f...fmt_misc.automount loaded active waiting   Arbitrary Executable File Format                                              
    sys-device...sound-card0.device loaded active plugged   7 Series/C210 Series Chipset Fam                                              
    sys-device...et-enp4s0f2.device loaded active plugged   RTL8111/8168/8411 PCI Express Gi                                              
    sys-device...-net-wlp9s0.device loaded active plugged   BCM4313 802.11bgn Wireless Netwo                                              
    sys-device...ck-sda-sda1.device loaded active plugged   TOSHIBA_MK3259GSXP                                                            
    sys-device...ck-sda-sda2.device loaded active plugged   TOSHIBA_MK3259GSXP                                                            
    sys-device...ck-sda-sda3.device loaded active plugged   TOSHIBA_MK3259GSXP                                                            
    sys-device...ck-sda-sda4.device loaded active plugged   TOSHIBA_MK3259GSXP                                                            
    sys-device...ck-sda-sda5.device loaded active plugged   TOSHIBA_MK3259GSXP                                                            
    sys-device...ck-sda-sda6.device loaded active plugged   TOSHIBA_MK3259GSXP                                                            
    sys-device...0-block-sda.device loaded active plugged   TOSHIBA_MK3259GSXP                                                            
    sys-device...0-block-sr0.device loaded active plugged   MATSHITADVD-RAM_UJ8C0                                                         
    sys-device...0-tty-ttyS0.device loaded active plugged   /sys/devices/platform/serial8250                                              
    sys-device...0-tty-ttyS1.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS10.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS11.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS12.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS13.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS14.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS15.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS16.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS17.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS18.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS19.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...0-tty-ttyS2.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS20.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS21.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS22.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS23.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS24.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS25.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS26.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS27.device loaded active plugged   /sys/devices/platform/serial8250
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    UNIT                            LOAD   ACTIVE SUB       DESCRIPTION
    proc-sys-f...fmt_misc.automount loaded active waiting   Arbitrary Executable File Format
    sys-device...sound-card0.device loaded active plugged   7 Series/C210 Series Chipset Fam
    sys-device...et-enp4s0f2.device loaded active plugged   RTL8111/8168/8411 PCI Express Gi
    sys-device...-net-wlp9s0.device loaded active plugged   BCM4313 802.11bgn Wireless Netwo
    sys-device...ck-sda-sda1.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda2.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda3.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda4.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda5.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...ck-sda-sda6.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...0-block-sda.device loaded active plugged   TOSHIBA_MK3259GSXP
    sys-device...0-block-sr0.device loaded active plugged   MATSHITADVD-RAM_UJ8C0
    sys-device...0-tty-ttyS0.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...0-tty-ttyS1.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS10.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS11.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS12.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS13.device loaded active plugged   /sys/devices/platform/serial8250
    sys-device...-tty-ttyS14.device loaded active plugged   /sys/devices/platform/serial8250
    tia!

    *in every new kernel I feel worst boot time...

  2. #2
    Join Date
    Jun 2008
    Location
    Kansas City Area, Missouri, USA
    Posts
    7,236

    Default Re: 27 tty's?...

    On 01/25/2014 07:36 AM, goro goren wrote:
    >
    > Hi there!
    >
    > do not need it! just one or two...
    >
    >
    > Code:
    > --------------------
    > systemctl
    > UNIT LOAD ACTIVE SUB DESCRIPTION
    > proc-sys-f...fmt_misc.automount loaded active waiting Arbitrary Executable File Format
    > sys-device...sound-card0.device loaded active plugged 7 Series/C210 Series Chipset Fam
    > sys-device...et-enp4s0f2.device loaded active plugged RTL8111/8168/8411 PCI Express Gi
    > sys-device...-net-wlp9s0.device loaded active plugged BCM4313 802.11bgn Wireless Netwo
    > sys-device...ck-sda-sda1.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda2.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda3.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda4.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda5.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda6.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...0-block-sda.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...0-block-sr0.device loaded active plugged MATSHITADVD-RAM_UJ8C0
    > sys-device...0-tty-ttyS0.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...0-tty-ttyS1.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS10.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS11.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS12.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS13.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS14.device loaded active plugged /sys/devices/platform/serial8250
    > lines 1-20...skipping...
    > UNIT LOAD ACTIVE SUB DESCRIPTION
    > proc-sys-f...fmt_misc.automount loaded active waiting Arbitrary Executable File Format
    > sys-device...sound-card0.device loaded active plugged 7 Series/C210 Series Chipset Fam
    > sys-device...et-enp4s0f2.device loaded active plugged RTL8111/8168/8411 PCI Express Gi
    > sys-device...-net-wlp9s0.device loaded active plugged BCM4313 802.11bgn Wireless Netwo
    > sys-device...ck-sda-sda1.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda2.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda3.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda4.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda5.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda6.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...0-block-sda.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...0-block-sr0.device loaded active plugged MATSHITADVD-RAM_UJ8C0
    > sys-device...0-tty-ttyS0.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...0-tty-ttyS1.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS10.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS11.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS12.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS13.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS14.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS15.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS16.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS17.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS18.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS19.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...0-tty-ttyS2.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS20.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS21.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS22.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS23.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS24.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS25.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS26.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS27.device loaded active plugged /sys/devices/platform/serial8250
    >
    >
    >
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    >
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    >
    >
    > UNIT LOAD ACTIVE SUB DESCRIPTION
    > proc-sys-f...fmt_misc.automount loaded active waiting Arbitrary Executable File Format
    > sys-device...sound-card0.device loaded active plugged 7 Series/C210 Series Chipset Fam
    > sys-device...et-enp4s0f2.device loaded active plugged RTL8111/8168/8411 PCI Express Gi
    > sys-device...-net-wlp9s0.device loaded active plugged BCM4313 802.11bgn Wireless Netwo
    > sys-device...ck-sda-sda1.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda2.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda3.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda4.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda5.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...ck-sda-sda6.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...0-block-sda.device loaded active plugged TOSHIBA_MK3259GSXP
    > sys-device...0-block-sr0.device loaded active plugged MATSHITADVD-RAM_UJ8C0
    > sys-device...0-tty-ttyS0.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...0-tty-ttyS1.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS10.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS11.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS12.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS13.device loaded active plugged /sys/devices/platform/serial8250
    > sys-device...-tty-ttyS14.device loaded active plugged /sys/devices/platform/serial8250
    > --------------------
    >
    >
    > tia!
    >
    > *in every new kernel I feel worst boot time...


    If you want to have fewer ttys, you will need to configure and build the kernel
    yourself. Plan on devoting an entire day unless you have previously done this.
    When you finish, you will save a few hundred bytes in the kernel, and it will
    boot a few milliseconds quicker. Is that worth it to you?

    Of course, you will need to repeat the kernel rebuild for every new kernel
    release. Of course, it will be somewhat quicker after the first time.


  3. #3
    Join Date
    Feb 2009
    Location
    Spain
    Posts
    25,547

    Default Re: 27 tty's?...

    On 2014-01-25 15:40, Larry Finger wrote:
    > If you want to have fewer ttys, you will need to configure and build the
    > kernel yourself. Plan on devoting an entire day unless you have
    > previously done this. When you finish, you will save a few hundred bytes
    > in the kernel, and it will boot a few milliseconds quicker. Is that
    > worth it to you?


    The log output does not show timestamps, so that is not easy to see how
    fast it goes.

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 12.3 x86_64 "Dartmouth" at Telcontar)

  4. #4
    Join Date
    Jun 2008
    Location
    San Diego, Ca, USA
    Posts
    13,295
    Blog Entries
    2

    Default Re: 27 tty's?...


    So, awhile back I was reading the ongoing blog posted by the systemd creators(pls don't make me find it, it should be easy enough to find for anyone who really wants to read their words),

    And they actually used tty as an example for one of systemd's cool features... unlike SystemV, instantiating multiple versions of the same app (the tty console in this case) does not require whole new processes. Instead, when systemd launches a new instance of an existing running app, the new instance utilizes shared resources of the currently running app.

    So, when you consider the issue of multiple ttys when running systemd, it's actually kind of cool that 27 instances(likely far more than anyone would really need) might already be available to use without needing to create, and the multiple extra running instances actually don't cost the system much if anything to instantiate (and then go latent).

    TSU

  5. #5

    Default Re: 27 tty's?...

    HI!

    is this true?:

    Dracut The new way to make your Linux box boot faster
    http://www.techradar.com/news/softwa...dracut-1078647

    just what I need it???

  6. #6
    Join Date
    Feb 2009
    Location
    Spain
    Posts
    25,547

    Default Re: 27 tty's?...

    On 2014-01-26 01:36, tsu2 wrote:

    > And they actually used tty as an example for one of systemd's cool
    > features... unlike SystemV, instantiating multiple versions of the same
    > app (the tty console in this case) does not require whole new processes.
    > Instead, when systemd launches a new instance of an existing running
    > app, the new instance utilizes shared resources of the currently running
    > app.


    This feature should not need systemd, it is, in theory, a Linux design
    feature. Even Windows 3.11 had it!

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 12.3 x86_64 "Dartmouth" at Telcontar)

  7. #7
    Join Date
    Nov 2009
    Location
    West Virginia Sector 13
    Posts
    16,287

    Default Re: 27 tty's?...

    http://www.techradar.com/news/softwa...dracut-1078647

    That is an interesting startup system but it is NOT openSUSE. ie you can't just install that and expect it to work. But then it is up to you and the amount of low level Linux knowledge you have and if it is worth the large effort you would have to do to make it work to save maybe a couple of sec of boot time.

  8. #8
    Join Date
    Nov 2009
    Location
    West Virginia Sector 13
    Posts
    16,287

    Default Re: 27 tty's?...

    PS what is your hardware and how long does the boot take. It may just be a simple tweak if the boot time is real unseasonable.

  9. #9
    Join Date
    Feb 2009
    Location
    Spain
    Posts
    25,547

    Default Re: 27 tty's?...

    On 2014-01-26 20:46, gogalthorp wrote:
    >
    > 'http://www.techradar.com/news/softwa...dracut-1078647'
    > (http://tinyurl.com/qxyqul4)
    >
    > That is an interesting startup system but it is NOT openSUSE. ie you
    > can't just install that and expect it to work. But then it is up to you
    > and the amount of low level Linux knowledge you have and if it is worth
    > the large effort you would have to do to make it work to save maybe a
    > couple of sec of boot time.


    It is possible that 13.2 switches to dracut. They are trying.

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 12.3 x86_64 "Dartmouth" at Telcontar)

  10. #10

    Default Re: 27 tty's?...

    Quote Originally Posted by gogalthorp View Post
    PS what is your hardware and how long does the boot take. It may just be a simple tweak if the boot time is real unseasonable.
    CHRONOGRAPH in hand: 1min:08 sec from grub to KDE desktop (I think is too MUCH)

    Code:
    ~> systemd-analyze
    Startup finished in 2.206s (kernel) + 4.540s (initrd) + 17.929s (userspace) = 24.676s
    Code:
    ~> systemd-analyze blame | head
              6.323s plymouth-start.service
              5.084s apparmor.service
              4.712s NetworkManager.service
              4.366s ModemManager.service
              3.357s avahi-daemon.service
              3.282s wpa_supplicant.service
              3.251s xdm.service
              3.209s vmtoolsd.service
              3.011s systemd-logind.service
              2.661s postfix.service

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