🚀 go-pugleaf

In article <1992Apr8.175050.22842@ceadg>, michael@ceadg writes:
|> Can anyone give me a good explanation of what PMGR does?  We are having
|> a problem at one of our customer's where PMGR is using 2-3 times as much
|> cpu as we expect (I used CPUTIME from DG's Performance Monitor).  The 
|> machine with the problem is an MV/1000 with 2 printers on the system
|> board and a LAC16-II (RS422) with 7 RS422 terminals and the modem/printer
|> ports on the LAC connected to input devices.  The RS232 inputs on the LAC
|> are not part of the problem, because the condition still exists when the
|> ports are empty.  There are no unterminated lines either.

I'm no VS internals expert, but I have been a AOS/AOSVS/AOSVSII user since 
1979.  In the old days, PMGR used to be involved in passing characters to 
and receiving characters from all character-oriented devices (i.e. anyhting
that's not block-oriented).  Beginning with AOS/VS II rev 2.10, terminal 
services has moved to the kernel and is no longer part of PMGR.  

If I was having the problem you describe, I would use the DG Performance
Monitor to see how many characters PMGR was handling.  I'd probably also use
the LINE_MONITOR program to see if there was an excessive number of characters
coming in on a particular line.  You might also want to look at your parallel 
printer port and the DUART ports on the system board.  

|> I was hoping that information on what PMGR does would help us determine
|> why it is so busy on this system.  Any other suggestions about this 
|> situation would be appreciated, also.
|> 
|> Thanks,
|> mike

-- 

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