Re: On optimising the scheduler for large run queues

From: Jan-Simon Pendry (jsp@ms.com)
Date: Sat Jan 29 2000 - 08:32:30 EST

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    Jamie Lokier wrote:
    > [lots of good stuff]

    i think this is one of those philosophical areas where a decision
    one way or another needs to be made.

    other commercial unix systems (hp, sun, ibm, sequent) tend to split
    into two camps as follows:

    1. those that optimise for performance, but degrade badly under intense
       load.

    2. those that optimise for intense load, but don't have top-notch
       performance under low-load.

    now, my bias is towards #2, because i am more interested in server
    systems, and from a sizing, tuning and sysadmin perspective they
    are easier to plan and manage. however, this is probably not the
    right thing for a desktop operating system.

    so, which way is linux going? you tell me - there doesn't seem to
    be a "right" answer here. this may well mean there needs to be two
    schedulers, one with ultra-low overhead for desktops, and another,
    with better scalability, for servers.

    jan-simon.

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