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    SubjectRe: [ckrm-tech] [patch 25/38] CKRM e18: Add fork rate control to the numtasks controller
    Gerrit Huizenga wrote:

    > +As with any other resource under the CKRM framework, numtasks also assigns
    > +all the resources to the detault class(/rcfs/taskclass). Since , the number
    > +of tasks in a system is not limited, this resource controller provides a
    > +way to set the total number of tasks available in the system through the config
    > +file. By default this value is 128k(131072). In other words, if not changed,
    > +the total number of tasks allowed in a system is 131072.
    > +
    > +The config variable that affect this is sys_total_tasks.

    Because there are people who do not want to use the numtask controller,
    no limit is a preferable default value for sys_total_tasks.

    > +Usage
    > +-----
    > +
    > +For brevity, unless otherwise specified all the following commands are
    > +executed in the default class (/rcfs/taskclass).
    > +
    > +As explained above the config file shows sys_total_tasks and forkrate
    > +info.
    > +
    > + # cd /rcfs/taskclass
    > + # cat config
    > + res=numtasks,sys_total_tasks=131072,forkrate=1000000,forkrate_interval=3600
    > +
    > +By default, the sys_total_tasks is set to 131072(128k), and forkrate is set
    > +to 1 million and forkrate_interval is set to 3600 seconds. Which means the
    > +total number of tasks in a system is limited to 131072 and the forks are
    > +limited to 1 million per hour.

    From the same point of view, the default value of forkrate should be
    no limit. (In addition, 1 million tasks per hour is not an abnormally
    high rate.)

    MAEDA Naoaki

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