Article View: comp.bugs.sys5
Article #988Re: 'ps' is too slow
From: Mark H. Colburn
Date: Fri, 10 Mar 1989 19:21
Date: Fri, 10 Mar 1989 19:21
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In article <1119@auspex.UUCP> guy@auspex.UUCP (Guy Harris) writes: +>In DG/UX, as of 4.00, there is a system call "dg_process_info", which +>returns just about everything you'd want from a 'ps'. You can specify +>a uid, pid, tty, pgrp or 'all' (the -u, -p, -t, -g and -e options) to +>to limit the processes returned. You just sit in a loop for as long as +>the call returns 1. + +S5R4 will probably do something similar with "/proc". Basically, the +loop will probably look something like: The SunOS 4.0 release has a fast version of PS. The first time I ran it I was waiting for it to start as all the information scrolled off the screen... Whether this will be in later versions of S5r4 or not, I don't know, but, as usuall, Guy's prediction is probably accurate. I believe that Sun does the fast ps by cacheing all of the process status information in the kernel, rather than having to read /etc/utmp, etc. Mark H. Colburn MN65-2300 colburn@SRC.Honeywell.COM Systems Administration and Support Honeywell Systems & Research Center
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!hal!nic.MR.NET!srcsip!io!colburn From: colburn@io.SRC.Honeywell.COM (Mark H. Colburn) Newsgroups: comp.bugs.sys5 Subject: Re: 'ps' is too slow Message-ID: <18469@srcsip.UUCP> Date: 10 Mar 89 19:21:17 GMT References: <1898@holos0.UUCP> <3569@sugar.uu.net> <11991@swan.ulowell.edu> <1119@auspex.UUCP> Sender: news@src.honeywell.COM Reply-To: colburn@io.UUCP (Mark H. Colburn) Distribution: usa Organization: Honeywell Systems & Research Center, Camden, MN Lines: 21