( ESNUG 434 Item 2 ) -------------------------------------------- [11/18/04]
Subject: ( ESNUG 433 #5 ) Yet Another DC 2004.6 Nighthawk User Benchmark
> We were also able to fit our design on our 32-bit Linux boxes and got
> even faster turnaround time.
>
> DC 2003.06 DC 2004.06 beta Nighthawk
> ------------ -------------------------
> Runtime 61 hrs 20 hrs
> Area (cells) 1.1 M 1.1 M
> WNS -0.5 ns -0.15 ns
> TNS 1318 ns -229 ns
>
> Of course nothing is for free. We did have to make one change to our
> scripts; removed any explicit use of uniquify commands.
>
> - Sam Bishai
> Cisco Systems Kanata, ON, Canada
From: Linming Jin <ljin=user domain=brocade spot calm>
Hi, John,
Here is our benchmark data of DC 2003.12-SP1 vs. DC 2004.06 Nighthawk:
Nighthawk Improvement
DC 2003.12-SP1 DC 2004.06 of Nighthawk
-------------- ---------- --------------
Total Number of Nets 39072 33545 14.1%
Leaf Cell Count 33515 28122 16.1%
Reference Cell Count 251 267 6.4%
Combinational Area 252759 242610 4.0%
Noncombinational Area 2000381 1998169 0.1%
Cell Area 2253140 2240779 0.5%
Runtime 6798 9056 -33.2% (worse)
Timing Path Group 'CLK1'
Levels of Logic 35 30 14.3%
Critical Path Length 2.551 2.33 8.7%
Critical Path Slack -0.423 -0.21 50.4%
Total Negative Slack -172.392 -57.5 66.6%
No. of Violating Paths 1026 479 53.3%
Timing Path Group 'CLK2'
Levels of Logic 16 15 6.3%
Critical Path Length 1.023 1.04 -1.7% (worse)
Critical Path Slack -0.417 -0.43 -3.1% (worse)
Total Negative Slack -17.947 -11.94 33.5%
No. of Violating Paths 132 80 39.4%
Timing Path Group 'CLK3'
Levels of Logic 17 14 17.6%
Critical Path Length 2.754 2.7 2.0%
Critical Path Slack -0.625 -0.59 5.6%
Total Negative Slack -134.336 -148.73 -10.7% (worse)
No. of Violating Paths 362 344 5.0%
Timing Path Group 'CLK4'
Levels of Logic 22 10 54.5%
Critical Path Length 2.132 2.12 0.6%
Critical Path Slack -0.099 -0.02 79.8%
Total Negative Slack -7.756 -0.52 93.3%
No. of Violating Paths 126 26 79.4%
The runtime of 2004.06 Nighthawk was actually longer in our test, but it
has improved in most other areas.
- Linming Jin
Brocade Communications San Jose, CA
|
|
