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Performance issue from Unixware 2.1 to Unixware 7

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Operating Systems SCO Performance issue from Unixware 2.1 to Unixware 7
# 1  
Old 10-16-2005
Data Performance issue from Unixware 2.1 to Unixware 7
Hello,

I am having performance problem when , i ported a c code from Unixware 2.1 to Unixware 7.0.0.

My program establishes a synchornous connection with the client in a windows OS and then sends and receives messsages using the recv and send calls.

What i hyave noticed is that after a response is send , the program spents a long time in receving the message. In Unixware 2.1 this code was working fine with the front end , but after porting the same code to Unixware 7.0.0 , there is a time gap in the recv function , which eventually slows down the process.

The issue is appearing when the message size is around 2200 bytes.
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LEARN ABOUT NETBSD

pmc

PMC(1)							    BSD General Commands Manual 						    PMC(1)

NAME

     pmc -- performance-monitoring counter interface for command execution

SYNOPSIS

     pmc -h
     pmc -C
     pmc -c event command [options ...]

DESCRIPTION

     pmc is a means of using a processor's performance-monitoring counter (PMC) facility to measure various aspects of a program's execution.  It
     is meant to be used in a fashion similar to time(1).

     The arguments are as follows:

     -h      Display a list of performance counter events available on the system.

     -C      Cancel any performance counters that are currently running.

     -c event
	     Count the event specified by event while running the command.

DIAGNOSTICS

     PMC support is not compiled into the kernel  Performance-monitoring counter support has not been compiled into the kernel.  It may be
     included using the PERFCTRS option.  See options(4) for details.

     PMC counters are not supported by CPU  Performance-monitoring counters are not available for the CPU.

SEE ALSO

     time(1), options(4)

HISTORY

     The pmc command first appeared in NetBSD 1.6.

AUTHORS

     The pmc command was written by Frank van der Linden <fvdl@wasabisystems.com>.  The kernel support for reading performance counters on the
     i386 architecture was written by
     Jason R. Thorpe <thorpej@zembu.com>.

BUGS

     The pmc command currently only supports performance-monitoring counters on the i386 architecture.

BSD
								 October 24, 2000							       BSD