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Conference turris::c_plus_plus

Title:C++
Notice:Read 1.* and use keywords (e.g. SHOW KEY/FULL KIT_CXX_VAX_VMS)
Moderator:DECCXX::AMARTIN
Created:Fri Nov 06 1987
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3604
Total number of notes:18242

3564.0. "Named Pipes and SMP" by NNTPD::"rogerg@mail.dec.com" (Genne Roger) Thu May 08 1997 19:42

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3564.1Named Pipes and SMP again!NNTPD::"rogerg@mail.dec.com"Genne RogerThu May 08 1997 20:0715
Have a Internet content provider with C++ app written for NT4.0 named pipes. 
The application running on Alpha 4100, runs 17% slower on 2 cpus than on a
single cpu.  The ASAP group confirmed this and also showed that as we add
CPUs, our throughput measured in resolutions/sec is further degraded.  The
same thing happens on an Intel machine.  Our field engineers have confirmed we
are on the latest firmware releases and HAL so we are down to determining if
the application is written wrong for SMP or there is a bug in NT (hmm?)
Anyone willing to take a shot at this?  We need someone who knows how to write
C++ for SMP to help or tell us where we are wrong.  Ten 4100s are riding on
this versus our friends at Sun.  
Cross-posted in Windows-NT and NT-Developers.
Thanks for any help/suggestions,
Genne Roger
510-233-3386
[Posted by WWW Notes gateway]
3564.2HYDRA::CHINFri May 09 1997 21:494

     Also cross-posted at C_PLUS_PLUS #3564, NT-DEVELOPER #3238, 
     Windows-NT #5991.
3564.3DECC::OUELLETTEmudseason into blackfly seasonFri May 09 1997 22:515
This is entirely an NT problem.
You won't get an answer here, but may in DECWET::NTAXP or
the two other conferences to which you cross posted.

R.