DosQueryPerformance interface

Name A rexx interface to DosQueryPerformance
Version public release 1.0.0 (build 1) - May 25th,2001
Author Takayuki 'January June' Suwa
(see EMail Addresses)
Distrib. Freeware
Type REXX DLL
Price -
Note w/ source
Source Internet
Name: perfdll*.*
(see Internet - Web Pages)

Description from the author:

"This software is a dynalink library that queries performance activity ratios (busy, idle and interrupt one) of overall system and each CPUs on 32bit OS/2 process. This function is derived from DosPerfSysCall() API, but it is slightly complicated to issue this API directly:

Not all of 32bit OS/2 have DosPerfSysCall().
Not all of 80386-compatible CPUs have RDTSC instruction.
It is necessary to determine # of CPUs to calculate overall system acativity, in SMP environments.
More calculations are required to obtain activity ratios, because queried results are raw snapshot of 64bit-wide RDTSC counters.

This DLL internally does such complex handlings of all above, thus you can simply call one: DosQueryPerformance() :)

It can be used any 32bit development suites that can issue OS/2 APIs such as emx/gcc, VisualAge C/C++ or Watcom C/C++, and REXX external function interface is also supplied.

Free to use, under the GNU LGPL. "

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