From:	SMTP%"RELAY-INFO-VAX@CRVAX.SRI.COM" 14-JAN-1994 19:09:36.10
To:	EVERHART
CC:	
Subj:	Undocumented utility

From: gleason@mwk.com
X-Newsgroups: comp.os.vms
Subject: Undocumented utility
Message-ID: <1994Jan13.101017.1796@mwk.com>
Date: 13 Jan 94 10:10:17 CST
Organization: M. W. Kellogg, Houston TX
Lines: 28
To: Info-VAX@CRVAX.SRI.COM
X-Gateway-Source-Info: USENET


  I was reading the .com files for the rogue's gallery of components
that make up DECnet Phase V (cursed be its name), trying to come up
to speed on it, and I found an undocumented utility that may be of
some occasional use. 

  The utility is sys$system:les$findptmax.exe. It will return the size
of the biggest contiguous block of free SPTEs on your system, multiplied
by two, in its exit status. I presume the value is multipled by two
to shift it out of the low bit, so it can still indicate success
or failure...anyway, if you...

$ run sys$system:les$findptmax
$ temp = $status
$ if (.not. $status) then exit
$ write sys$output temp/2

  You can find out what your free SPTE situation is. Since lots of things
that formerly loaded in non-paged pool are using SPTEs to map things
in instead, this can occasionally be a useful thing to know...

  Use at your own risk, there may be a good reason it's not documented,
etcetera, and so forth.

Lee K. Gleason N5ZMR     : "Say mister, what's it mean when a guy crashes out?"
Control-G Consultants    : "It means he's free"
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