Re: ten thousand small processes

From: Jon Mini (mini_at_freebsd.org)
Date: 06/27/03

  • Next message: Jon Mini: "Sounding important (was re: sacrificing performance for confusion)" 
    Date: Thu, 26 Jun 2003 20:51:32 -0700
To: "D. J. Bernstein" <djb@cr.yp.to>

    D. J. Bernstein [djb@cr.yp.to] wrote :

    > I want separate processes for the memory protection. Each process is
    > chrooted under its own uid, so it can't write to disk except through
    > supplied file descriptors, and it can't hit other processes. (If I had a
    > portable way to cut off other communication channels, such as creating
    > new sockets, I'd do that too.)

    Have you looked into our jail(8) mechanism?

    Considiner your resource conumtion needs, it is also too heavy-weight.

    > protection; I realize that it's hard to do better than that. But I'm not
    > willing to casually piss away large fractions of a gigabyte of RAM. Not
    > this decade, anyway.

    Unfortunately, FreeBSD is the wrong operating system for you.

    > I'm willing to sacrifice one page per process for the sake of memory
    > The lack of memory protection is exactly why I can't use threads. It's
    > also why I'm not surprised to hear that processes are _slightly_ less
    > efficient than threads. But something is seriously wrong if processes
    > are _much_ less efficient than threads.

    There are many other contributing factors that have been mentioned,
    but you are choosing to ignore. I'm afraid I can't comunicate with
    you effectively if you are going to ignore the facts.

    My sincerest apologies, 

    -- 
Jonathan Mini <mini@freebsd.org>
http://www.freebsd.org/
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