Date: Fri, 19 Jul 2002 15:52:03 -0700 From: Luigi Rizzo <rizzo@icir.org> To: Julian Elischer <julian@elischer.org> Cc: current@freebsd.org Subject: Relations between KSE, KSEG and NCPU Message-ID: <20020719155202.D37800@iguana.icir.org>
next in thread | raw e-mail | index | archive | help
Hi, I am trying to figure out what are the relations between KSE's, KSEG and NCPU -- from the description in kern_switch.c and in sys/proc.h I am not totally clear if: 1) a KSEG can have more KSE than NCPU; 2) a KSEG can have multiple KSE's running on different CPUS; Also I do not follow this comment in sys/proc.h: * Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to * be an indivisible unit from a time-sharing perspective, though each KSEG may * contain multiple KSEs. Does it mean that once the scheduler picks a KSEG it will try to place as many KSE's as it can on the available CPUs, rather than sharing the latter between KSEG's with ready threads ? thanks luigi ----------------------------------+----------------------------------------- Luigi RIZZO, luigi@iet.unipi.it . ICSI (on leave from Univ. di Pisa) http://www.iet.unipi.it/~luigi/ . 1947 Center St, Berkeley CA 94704 Phone: (510) 666 2927 ----------------------------------+----------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020719155202.D37800>