HP3000-L Archives

November 1998, Week 2

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Subject:
Re: VTSERVER Performance Question?
From:
John Zoltak <[log in to unmask]>
Reply To:
John Zoltak <[log in to unmask]>
Date:
Mon, 9 Nov 1998 16:20:59 -0500
Content-Type:
text/plain
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text/plain (72 lines) 
Michael,

It's just a guess, but way back when, some developers found that they
could keep a processes priority up by doing some useless terminal I/O. I
don't know if this is what's going on. There could be other reasons, but
this is one possibility.

John Zoltak
North American Mfg Co

> -----Original Message-----
> From: Michael Anderson [SMTP:[log in to unmask]]
> Sent: Monday, November 09, 1998 3:51 PM
> To:   [log in to unmask]
> Subject:      [HP3000-L] VTSERVER Performance Question?
> 
> Below is 45 sec's of output from GLANCE. My question involves #S757,
> notice the VTSERVER 
> (Pin#100) is using a significant amount of CPU, why? 
> 
> Their is not any terminal IO associated with #S757. 
> #S757 is running FINPAC, which is doing a serial read of about 16,000
> records. 
> 
> If I were to using Reflections on a PC, and TELNET to the host HP3000,
> this FINPAC process 
> would be using 92% CPU. However, if I use Inbound VT the VTSERVER
> process will take-up 
> about 20% to 50% CPU. This does degrade the performance of my
> application. 
> 
> Anyone on the list have an explanation for what seems to be a waste of
> CPU cycles? 
>   
> 
> XPERT:|CPU IS MODERATE| |CM IS MODERATE| 
> S757   16 LEO,MANAGER.FINTEST   100 VTSERVER   C152 25.9%   0.0   0  
> 0.0  TERM 
> J1754  10 ENG237J,MGR.INFOSYS    58 ENG237     D255 14.6%   5.0   0  
> 0.0  CPU 
> S757   16 LEO,MANAGER.FINTEST    63 FINPAC     C162 40.4%   0.0   0  
> 0.0  I/O 
> 
> XPERT:|CM IS MODERATE| 
> J1746  10 NETMAIL,SERVER.THREE  135 SMTPSERV   E152  4.7%   0.2   0  
> 0.0  FATH 
> J1746  10 NETMAIL,SERVER.THREE  125 POP3SERV   E152  1.3%   0.0   0  
> 0.0  FATH 
> S757   16 LEO,MANAGER.FINTEST   100 VTSERVER   C152 24.7%   0.0   0  
> 0.0  TERM 
> J1754  10 ENG237J,MGR.INFOSYS    58 ENG237     D255 14.9%   4.4   0  
> 0.0  CPU 
> S757   16 LEO,MANAGER.FINTEST    63 FINPAC     C170 36.7%   0.0   0  
> 0.0  I/O 
> 
> XPERT:|CPU IS MODERATE| |CM IS MODERATE| 
> J1746  10 NETMAIL,SERVER.THREE  125 POP3SERV   E152  2.6%   0.0   0  
> 0.0  FATH 
> S757   16 LEO,MANAGER.FINTEST   100 VTSERVER   C152 23.9%   0.0   0  
> 0.0  TERM 
> J1754  10 ENG237J,MGR.INFOSYS    58 ENG237     D255 16.5%   4.8   0  
> 0.0  CPU 
> S757   16 LEO,MANAGER.FINTEST    63 FINPAC     C157 38.7%   0.1   0  
> 0.0  I/O 
> 
> Thanks in advance, 
> 
> Michael Anderson 
> TIW Corporation, 
> Sr. Systems Programmer. 
> Houston, TX, (713) 729-2110 Ext:100

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