Can Parameter tool be convinced to use spectre sweep command

[Svenn Are Bjerkem]

Hi,
if I use spectre on the command line, I can use the sweep command to
sweep a parameter. If I want to do the same in ADE, I have to use the
parametric tool for everything but a simple one dimensional dc sweep. My
experience with the parametric tool is that it starts a new simulation
for each iteration, replacing the value of a variable each time. As I am
working in a matrix, each launch has a bit of overhead as the job has
to be farmed off to the grid. By using the sweep command I can finish a
job in 0.1 sec that otherwise take 1 minute, where most of the time is
wasted by finding a suitable computer in the grid.

--
Svenn

 

[Andrew Beckett]

Hi Svenn,

In IC5033 (I think that's when it changed), you can now do parametric in
paramset mode (I've forgotten what the name of the setting in the parametric
tool is) - this allows you to sweep over a set of rows of parameter values
(i.e. sweep all parameters at once, rather than independently).

When this is done, it uses a sweep of a paramset.

In normal situations, it doesn't use sweep. I wish it did, for the same
reasons as you. Of course, if you're doing a normal simulation, with
spectre.envOpts controlMode set to interactive, it _will_ use the
same simulation session, and is quite quick.

I remember there being a PCR for this - but I think it got marked fixed
when paramset was supported. Personally I think the parametric tool is
overdue a rewrite - I think there's a strong chance that will happen as part
of some current overhaul work that's happening at the moment.

So the simple answer is, no, you can't get it to use a sweep. One option would
be to have an include file with the analyses in, but that rather defeats the
point of there being a UI...

Regards,

Andrew.


On Fri, 10 Dec 2004 08:46:27 +0100, Svenn Are Bjerkem <svenn.are@bjerkem.de>
wrote:

Hi,
if I use spectre on the command line, I can use the sweep command to
sweep a parameter. If I want to do the same in ADE, I have to use the
parametric tool for everything but a simple one dimensional dc sweep. My
experience with the parametric tool is that it starts a new simulation
for each iteration, replacing the value of a variable each time. As I am
working in a matrix, each launch has a bit of overhead as the job has
to be farmed off to the grid. By using the sweep command I can finish a
job in 0.1 sec that otherwise take 1 minute, where most of the time is
wasted by finding a suitable computer in the grid.