Is there any explanation for a massive slowdown on nt when using a 1gb
pmc memory card? Does nt do any mapping on its own for such a card, even
if there is no driver loading for it? I also see that the card takes
some resources, such as an interrupt, and I don’t understand why.
Any light on this would be appreciated
Nachum Kanovsky
Driver Development Team
xxxxx@mangodsp.com
02 5328706
011 972 2 532 8706
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>Is there any explanation for a massive slowdown on nt when using a 1gb pmc
memory card?
Compared to what? A quick Internet search shows a PMC memory card to be a
memory card on an I/O bus, which will be much slower than memory directly
attached to a normal processor support chipset.
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Without using the memory card, nt just slows down unbearably. It takes
around 10 minutes to boot up with the card inside.
I was wondering if nt automatically does some allocations or mapping for
memory devices that are placed inside, which could possibly explain
this.
The card is in there for a host/dsp application, but the slowdown occurs
with neither the host program or dsp program running.
Thanx
nachum
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Jan Bottorff
Sent: Monday, December 24, 2001 1:57 PM
To: NT Developers Interest List
Subject: [ntdev] Re: Slowdown using a PMC 1GB memory card
Is there any explanation for a massive slowdown on nt when using a 1gb
pmc
memory card?
Compared to what? A quick Internet search shows a PMC memory card to be
a
memory card on an I/O bus, which will be much slower than memory
directly
attached to a normal processor support chipset.
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Where in the boot process do you see the delay?
Is it spread out, or is it during ntldr, etc?
How much other memory is on the system? What address does the memory get?
Perhaps NT thinks this is regular system memory?
-DH
----- Original Message -----
From: “Nachum Kanovsky”
To: “NT Developers Interest List”
Sent: Monday, December 24, 2001 1:22 PM
Subject: [ntdev] Re: Slowdown using a PMC 1GB memory card
> Without using the memory card, nt just slows down unbearably. It takes
> around 10 minutes to boot up with the card inside.
> I was wondering if nt automatically does some allocations or mapping for
> memory devices that are placed inside, which could possibly explain
> this.
> The card is in there for a host/dsp application, but the slowdown occurs
> with neither the host program or dsp program running.
> Thanx
> nachum
>
> -----Original Message-----
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com] On Behalf Of Jan Bottorff
> Sent: Monday, December 24, 2001 1:57 PM
> To: NT Developers Interest List
> Subject: [ntdev] Re: Slowdown using a PMC 1GB memory card
>
>
>
> >Is there any explanation for a massive slowdown on nt when using a 1gb
> >pmc
> >memory card?
>
> Compared to what? A quick Internet search shows a PMC memory card to be
> a
> memory card on an I/O bus, which will be much slower than memory
> directly
> attached to a normal processor support chipset.
>
> - Jan
>
>
> —
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