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List:       hpux-devtools
Subject:    RE: HPUX-DEVTOOLS: Delay in Picking the Signals
From:       "SAILER Lee" <Lee.SAILER () swift ! com>
Date:       2007-06-21 19:37:05
Message-ID: C1C1B861CC37BE4AB1DA50DCABF8241A012E11D3 () CU-EXCHANGE-01 ! swift ! corp
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>-----Original Message-----
>From: owner-hpux-devtools@cxx.cup.hp.com 
>> 
>We have 25 programs running in background in our application. 
> 
>The application is facing delays in one of the programs 
>picking the signals,
>the programs communicate using Signals. 
> 
>We are on HP-UX Itanium 11.23 server.
> 
>The same programs used to run ( we recompiled to suit the new 
>Architecture)
>on HP-UX PA RISC 1.1 server with out any delays, the new 
>systems are much
>faster and bigger.
> 
>Can anybody has any inputs on where to look at these delays?
> 

Just thinking out loud...HP-UX 11.11 only checks for signals when it
returns from a system call, which is often, of course.  Check if 11.23
is the same.  Maybe your procs used to execute nore or different system
calls, and so received signals more often.

How long is the delay?  Is that proc multi-threaded?  How many cpus?

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