[PCB_FORUM] Re: Ram
- From: "Mitch S. Morey" <cadpro2k@xxxxxxxxxx>
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Wed, 2 Nov 2005 09:25:21 -0800 (PST)
Interesting question to Cadence Buck. I don't expect an answer.
I was amazed you only have 1/2G installed on your machines. Nowadays I'm
using 1G RAM on all the machines I use. The engineers using schematic
capture and documentation can still have less (as always). Unless their
machines are doing simulations, etc.
One other point is to look into video cards with as much onboard memory as
possible too. The cards are fairly cheap, and can improve performance.
Good day.
Mitch
> Hello,
>
> In regards to RAM amount. This will most likely will end up being a
> software implementation issue.
> If I remember correctly, with the P3 processors and above, windows will
> allow a virtual memory allocation of
> 2 GBytes to each process if there is no memory allocation request from the
> software it self. If the software
> asks for, say, 300 MBytes, then that is all the memory that Windows will
> allocate.
>
> So the question to the Cadence personnel is, how do the Allegro tool
> request and use available memory?
> I know that the Specctra router will use all the memory that it can get.
> Our
> machines have mostly 512 MBytes
> and I have not seen Allegro 15.2 use more than 200 MBytes to date on our
> designs.
>
> You may want to watch the process tab of the task manager as you us the
> tool to see how it is using memory
> resources.
>
> Buck...
>
> -----Original Message-----
> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Garrett
> Gilbertson
> Sent: Wednesday, November 02, 2005 10:31 AM
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] Re: Ram
>
>
>
> Windows 15.2
> This brings up a question that I have been curious about.
> How much Ram do the Layout Designers suggest having?
>
> Garrett Gilbertson
>
>
>
>
> "Watts III, Nolan" <nolan.watts.iii@xxxxxxxx>
> Sent by: icu-pcb-forum-bounce@xxxxxxxxxxxxx
>
>
> 11/02/2005 08:23 AM
> Please respond to icu-pcb-forum
>
>
>
> To: icu-pcb-forum@xxxxxxxxxxxxx
> cc:
> Subject: [PCB_FORUM] Pausing on commands, anyone else?
>
>
>
> I'm seeing fairly consistent behavior out of the Allegro GUI by it pausing
> on certain commands, most repeatable is the Display/Color. The first time
> you invoke this it takes around 7 seconds for it to appear. Subsequent
> picks of it brings it up immediately, but NOT if some considerable time
> has
> passed, say 30 minutes. It is as if there is some sort of caching going
> on
> in the UI. I've seen this in both 15.2 and 15.5 and I'm running on high
> performance Precision 370 and 670 Dell's with lots of memory(>2Gb), so one
> might assume hardware isn't the limiting factor. I'm wondering if this is
> common performance for other users. If so, please reply. Otherwise, I'll
> submit a SR to Cadence.
>
> Thanks for your help,
>
>
>
>
>
>
> Nolan Watts
>
>
>
>
>
>
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