( ESNUG 445 Item 4 ) -------------------------------------------- [05/24/05]
Subject: ( DAC 04 #24 ) A Boatload of Detailed FishTail User Benchmarks
> Here are the data from two designs that we have run FishTail Focus on:
>
> Design #1
> Size: 2M gates Clocks: 14
> false paths: 9840 false path runtime: 3h 38m
> multi-cycle paths: 3896 multi-cycle path runtime: 21h 58m
>
> Design #2
> Size: 1.2M gates Clocks: 30
> false paths: 2661 false path runtime: 2h 54m
> multi-cycle paths: 1554 multi-cycle path runtime: 65h 13m
>
> False paths and multi-cycle paths are the number found by Focus. The
> runtimes are the wall time for Focus to run on a 64 bit Linux machine.
>
> - David Vinke of LSI Logic
From: [ Mighty Mouse ]
Hi John,
We used Focus to generate timing exceptions from RTL for the critical
endpoints on a 200 K instance, 4 clock design. Focus found 6,266 false
paths in our design in 3 hours, 57 minutes. The exceptions were verified
using Solidify and then read into Design Compiler. The netlist and SDC
generated by Design Compiler were then fed into PhysOpt. QoR data was
compared for the same flow with and without Focus exceptions.
no Focus with Focus
WNS -0.82 ns -0.03 ns
# Violations 682 19
Instances 193,147 192,123
Route length 11,841,259 10,634,302
Please handle me as anonymous. Hope this helps.
- [ Mighty Mouse ]
---- ---- ---- ---- ---- ---- ----
From: Vikram Somaiya <somaiya464=user company=oki spot gone>
Hi, John,
We did an eval of Fishtail Focus. In it, Focus was used to generate timing
exceptions from RTL. These exceptions were verified using a property
checking tool. The exceptions were read into Design Compiler. QoR (WNS,
total number of violations and instance count) was compared after logic
synthesis with and without Focus exceptions.
Design A: 10 K instances, 2 clocks
Exception Generation:
5 false paths generated in 2 hours
114 multi-cycle paths generated in 6 hours 26 minutes
Synthesis Impact:
Without Focus With Focus
WNS -0.57 ns -0.26 ns
# of Violations 688 272
Instances 10,796 10,613
Design B: 20 K instances, 2 clocks
Exception Generation:
39 false paths generated in 3 minutes
29 multi-cycle paths generated in 7 hours 22 minutes
Exception Verification:
False paths verified: 39/39
Multi-cycle paths verified: 29/29
Synthesis Impact:
Without Focus With Focus
WNS -2.75 ns +0.02 ns
# of Violations 729 0
Instances 19,771 17,265
Design C: 50 K instances, 1 clock
Exception Generation:
1,059 false paths generated in 2 hours 21 minutes
93 multi-cycle paths generated in 2 hours 48 minutes
Exception Verification:
False paths verified: 1059/1059
Multi-cycle paths verified: 93/93
Synthesis Impact:
Without Focus With Focus
WNS -0.22 ns 0 ns
# of Violations 64 0
Instances 49,966 50,532
Design D: 120 K instances, 4 clocks
Exception Generation:
0 false paths generated in 5 minutes
527 multi-cycle paths generated in 12 hours
Exception Verification:
Multi-cycle paths (MCPs) verified: 95/527
(the remaining 432 timed out)
Synthesis Impact (taking only the 95 verified MCPs):
Without Focus With Focus
WNS -0.91 ns -0.78 ns
# of Violations 469 447
Instances 118,142 118,247
All run time data for these 4 benchmarks are from a Linux platform.
- Vikram Somaiya
Oki Semiconductor Sunnyvale, CA
---- ---- ---- ---- ---- ---- ----
From: Danny Traynor <dtray=user company=jennic spot gone>
Hi John,
Enclosed is the 15 page eval we did of the Fishtail Focus tool when we first
used it last year. Your readers might be interested in it. The eval has
all of our benchmark data plus the scripts we used. Cheers.
- Danny Traynor
Jennic Ltd. Sheffield, UK
Editor's Note: This eval is #58 in the DeepChip.com Downloads. - John
Index
Next->Item
|
|
