Re: Minutes from 5/19 CKRM/PAGG discussion

From: Peter Williams (peterw_at_aurema.com)
Date: 05/25/04

  • Next message: Andrea Arcangeli: "Re: [PATCH] ppc64: Fix possible race with set_pte on a present PTE" 
    Date:	Tue, 25 May 2004 14:26:54 +1000
To: Hubertus Franke <frankeh@watson.ibm.com>

    Peter Williams wrote:
    > Hubertus Franke wrote:
    >
    >>
    >> One important input the PAGG team could give is some real
    >> examples where actually multiple associations to different groups
    >> is required and help us appreciate that position and let us
    >> see how this would/could be done in CKRM.
    >
    >
    > One example would be the implementation of CPU sets (or pools) a la
    > Solaris where there are named CPU pools to which processors and
    > processes are assigned. Processors can be moved between CPU pools and
    > when this happens it is necessary to visit all the processes that are
    > assigned to the pools involved (one losing and one gaining the
    > processor) and change their CPU affinity masks to reflect the new
    > assignment of processors. PAGG would be ideal for implementing this.
    >
    > At the same time, a resource management client could be controlling
    > resources allocated to processes based on some other criteria such as
    > the real user or the application being run without regard to which CPU
    > pool they are running in.

    Additionally, it seems to me that even within the field of resource
    management it is not necessarily the case that the same grouping is
    required for different resource types e.g. the grouping for control of
    CPU resources might be different to the grouping for control of network
    bandwidth allocation or disk space or disk I/O bandwidth, etc.

    Peter 

    -- 
Dr Peter Williams, Chief Scientist                peterw@aurema.com
Aurema Pty Limited                                Tel:+61 2 9698 2322
PO Box 305, Strawberry Hills NSW 2012, Australia  Fax:+61 2 9699 9174
79 Myrtle Street, Chippendale NSW 2008, Australia http://www.aurema.com
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