Win95 performance counter interface?

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2 total messages Started by Brandon Van Every Sat, 14 Nov 1998 00:00

#23450

Author: Brandon Van Every
Date: Sat, 14 Nov 1998 00:00

25 lines
1991 bytes

Does Win95 have an API interface to SET UP the Pentium II performance
counters?  i.e. a built-in method to indirectly execute the Ring 0 WRMSR
instruction?

I know you can do it on NT, I want to do it on Win95.

If Win95 has no such interface, is there a kernel driver to do it floating
around the net somewhere?

I've R a lot of TFMs including Intel docs, MSDN CDs, DejaNews on comp.arch,
comp.lang.asm.x86, comp.sys.intel, and intel.*, AltaVista on the subject in
general.  I am not getting anywhere....

BTW an interesting tool for monitoring the performance counters under Win95,
not exactly what I'm looking for:
http://developer.intel.com/drg/pentiumII/appnotes/pct_1_1.htm


--
Cheers,                    3d graphics optimization jock
Brandon Van Every          Seattle, WA
-----------------------------------------------------------------------
If we are all Gods         and we have thrown our toys the mortals away
and we are Immortal        What shall we do
and we cannot die          to entertain ourselves?

Re: Win95 performance counter interface?

#23449

Author: black_phantom
Date: Sun, 15 Nov 1998 00:00

24 lines
2057 bytes

> Does Win95 have an API interface to SET UP the Pentium II performance
> counters?  i.e. a built-in method to indirectly execute the Ring 0 WRMSR
> instruction?
>
> I know you can do it on NT, I want to do it on Win95.
>
> If Win95 has no such interface, is there a kernel driver to do it floating
> around the net somewhere?
>
> I've R a lot of TFMs including Intel docs, MSDN CDs, DejaNews on comp.arch,
> comp.lang.asm.x86, comp.sys.intel, and intel.*, AltaVista on the subject in
> general.  I am not getting anywhere....

Two choices:

Write your own VxD that will do the job (the conventional way)

Win95 allows you to rise from application to ring 0 and you can do so. If you
don't need antything but execute a couple of instructions this will be more
suitable way.

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