Re: syscons options and memory use

From: Dan Nelson (dnelson_at_allantgroup.com)
Date: 03/31/05

  • Next message: Peter Wemm: "Re: Problems with AMD64 and 8 GB RAM?" 
    Date: Thu, 31 Mar 2005 02:19:21 -0600
To: Ronald Klop <ronald-freebsd8@klop.yi.org>

    In the last episode (Mar 31), Ronald Klop said:
    > On Thu, 31 Mar 2005 01:04:10 -0600, Dan Nelson <dnelson@allantgroup.com>
    > wrote:
    > >In the last episode (Mar 31), Ronald Klop said:
    > >>The syscons manual page says:
    > >>" The following options will remove some features from the syscons
    > >> driver and save kernel memory.
    > >> [...]
    > >> SC_NO_SYSMOUSE
    > >> This option removes mouse support in the syscons driver.
    > >> The mouse daemon moused(8) will fail if this option is
    > >> defined. This option implies the SC_NO_CUTPASTE option
    > >> too.
    > >>"
    > >>
    > >>How much memory does this save (or how can I discover that)? Is it worth
    > >>it on a 96MB PentiumII laptop?
    > >
    > >I would guess that the memory savings is probably on the order of
    > >kilobytes. Useful if you're trying to prevent excessive swapping on an
    > >8MB system. Not worth disabling on your system.
    >
    > How can I see the size of my kernel?
    > I know vmstat -m and netstat -m, but from that info I don't see if I
    > reduced the memory footprint after disabling an option or device.

    For the kernel size itself, just "ls -l /boot/kernel/kernel" :) A more
    interesting number might be the output of "sysctl hw.usermem", which I
    believe is the amount of memory available to user processes. 

    -- 
	Dan Nelson
	dnelson@allantgroup.com
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  • Next message: Peter Wemm: "Re: Problems with AMD64 and 8 GB RAM?"

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