Long simulation time for analytical models

Farbin Fayza

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Apr 21, 2022, 2:01:37 PM4/21/22

to OpenRAM User

Hi,

I'm trying to run some simulations with analytical models. But they are taking very long time and sometimes they do not end.

For this configuration, it took 10 hours. Is it normal to have so long runtime for analytical models?

word_size = 128
num_words = 32
tech_name = "freepdk45"
process_corners = ["SS"]
supply_voltages = [ 1.0 ]

For this one, the simulation was stuck at some point.

word_size = 64
num_words = 64
tech_name = "freepdk45"
process_corners = ["SS"]
supply_voltages = [ 1.0 ]

The ending lines of the log file were these:

.....

**** Enclosing pins: 0.2 seconds
*** Finding pins and blockages: 35.8 seconds
[router/write_debug_gds]: Writing annotated router gds file to debug_route.gds

Could you help me solve this issue?

Best,

Farbin.

Matthew Guthaus

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Apr 21, 2022, 2:04:25 PM4/21/22

to openram-u...@ucsc.edu, farb....@gmail.com

Hi Farbin,

That is abnormally long especially with analytical models. It's not that big of a memory...

What commit of OpenRAM are you using?

Matt

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Matthew Guthaus

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Apr 21, 2022, 2:45:33 PM4/21/22

to Farbin Fayza, openram-u...@ucsc.edu

Try using the dev branch which is a bit ahead of that and see if this is fixed.

Matt

On Thu, Apr 21, 2022 at 1:11 PM Farbin Fayza <farb....@gmail.com> wrote:

Hi Matt,
Thanks for your quick reply. I'm using commit f66aac3264598eeae31225c62b6a4af52412d407.

Best,
Farbin.

Farbin Fayza

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Apr 21, 2022, 2:50:47 PM4/21/22

to Matthew Guthaus, openram-u...@ucsc.edu

Hi Matt,

Thanks for your quick reply. I'm using commit f66aac3264598eeae31225c62b6a4af52412d407.

Best,

Farbin.

On Thu, Apr 21, 2022 at 2:04 PM Matthew Guthaus <m...@ucsc.edu> wrote:

Farbin Fayza

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Apr 21, 2022, 2:50:53 PM4/21/22

to Matthew Guthaus, openram-u...@ucsc.edu

Thank you Matt. I'll try and let you know.

Farbin.

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