( 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