SUMMARY: SMP Question

From: Daniel David Benson <bensond_at_ssds.ucdavis.edu>
Date: Wed, 27 May 1998 09:52:47 -0600

Thanks for all the replies.

The following suggestions were made:

1) Use psrinfo - This just tells me that the CPUs are up and running. Not
   usage reports on each processor.

2) Use /usr/bin/X11/demos/cpuinfo - This provided some assurance that both
   CPUs are being used.

3) Use Monitor: gatekeeper.dec.com:/pub/DEC/monitor.alpha.tar.Z - I didn't
   try this but I'm assuming that it is similar to cpuinfo.

4) Use Performance Manager from Associated Products CD - I haven't tried
   this yet...but it sounds cool.

5) Use vmubc ftp://ftp.digital.com/pub/Digital/ - Haven't tried it but it
   sounds good.

6) Use collect ftp://ftp.digital.com/pub/Digital/collect/ - Haven't tried it
   but it sounds good.

7) Use kdbx:

        kdbx -k /vmunix
        (kdbx)cpustat -update 4

   This worked out great and completely convinced both CPUs were active.
   Thought it didn't tell me what PID was running on which CPU. Nor does
   it give any information on threads (Though, I haven't found a utility
   that does).

8) Run the sample code that comes with PSE - I'm going to try this.


Thanks to:

"John P . Speno" <speno_at_isc.upenn.edu>
Joseph C King <jking_at_chablis.cos.com>
Gary George <GGeorge_at_edc.gov.ab.ca>
alan_at_nabeth.cxo.dec.com
"Fliguer, Miguel" <M_Fliguer_at_miniphone.com.ar>
jmh_at_zk3.dec.com (Jan Mark Holzer, UEG)
Rodrigo Poblete <rpoblete_at_gmd.com.pe>
David Warren <warren_at_atmos.washington.edu>
"Degerness, Mandell ITSD:EX" <Mandell.Degerness_at_gems2.gov.bc.ca>

ORIGINAL MAIL:

>
> I have an Alpha Server 4000 with 2 400mhz CPUs in it. How can I run
> some tests to guarantee that both are being used? Both CPUs are
> definitely
> recognized at bootup but I had a user who compiled some pthread code
> and informed me that performance was slower than compared to a single
> linear
> program. Instead of muddying around with his code I would like to
> be able to guarantee that they are running and working.
>
-- 
----------------------------------------------------------------------
Daniel David Benson                                bensond_at_ucdavis.edu
System Administrator            http://wwwcsif.cs.ucdavis.edu/~bensond
Social Science Data Service      pgp - finger bensond_at_aion.ucdavis.edu
University of California, Davis                             Linux User
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Received on Wed May 27 1998 - 18:52:59 NZST

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