pair_report

pair_report 

Description

Outputs statistics to the Transcript area for net pairs. In addition, a fat.rpt file is created that reports net pair violations when the unpaired wire length exceeds 10*minWidth for the lowest metal layer.

In the statistics output, the following are reported:

• Summary
  • Number of opens and shorts after the composite nets are routed
  • Number of opens and shorts after the composite nets are divided into member nets
  • Number of opens and shorts for all nets
  • Unpaired percentage of total length of net pairs
  • Elapsed cpu time, in seconds
• Step Details
  • start
    • Number of Member Nets
    • Number of opens and shorts for the member nets
    • Total number of other nets
    • Number of opens and shorts for the other nets
  • create_topology, route
    • Number of opens and shorts for composite nets
    • Number of opens and shorts for other nets
    • Elapsed time, in seconds, for each step
    • Total elapsed time, in seconds
  • divide, clean
    • Number of opens and shorts for member nets
    • Number of opens and shorts for other nets
    • Total unpaired length and unpaired percentage of total length
    • Number of net pair violations and maximum acceptable unpaired length
    • Elapsed time, in seconds, for each step
    • Total elapsed time, in seconds

In fat.rpt, the following information is reported:

• Fat Net Opens
  • Net name
  • Route
  • Length
• Pairing Violations
  • Net name
  • Number of Vias in net
  • Wire Length of net
  • Total distance between pin pairs for the net
  • Best Pairing (Wire Length - PinPair Distance/2)
  • paired wire length
  • Unpaired length and unpaired percentage of total length
• Pair Statistics (reported for each net pair)
  • For each net, number of vias for each layer and total vias
  • For each net, wire length on each layer and total wire length
  • For each net pair, difference in number of vias and wire length by layer

Arguments

None

Examples

The following example shows output from pair_report for a routed net pair.

PairStats:         composite     divide (member nets)  final (all nets)
PairStats:         opens shorts  opens shorts unpair%  opens shorts unpair%  cpu
PairStats: Summary:    0      0      0      0       1    184      0       1  11.9
#= PAIR ROUTING REPORT =========================================================
#|
#|                 Member                   Other
#| Step            Nets   Opens  Shorts     Nets    Opens  Shorts
#|---------------------------------------------------------------
#| start               2      2       0        198    184       0
#|
#|                 Composite         Other Nets     Time(sec)
#| Step            Opens  Shorts     Opens  Shorts  Step   Total
#|---------------------------------------------------------------
#| create_topology     1       0       184       0   0.1      0.1
#| route               0       0       184       0  11.6     11.7
#|
#|            Member        Other         Unpaired       Violations  Time(sec)
#| Step       Opens Shorts  Opens Shorts  Length  Percent   (limit)  Step  Total
#|------------------------------------------------------------------------------
#| divide         0      0    184      0    7.04       1%  1 (3.60)   0.1   12.3
#| clean          0      0    184      0    7.04       1%  1 (3.60)   0.1   12.3

The following shows contents of the fat.rpt file created for the previous example.

# = FAT NET OPENS ================================================================================
# | Net                             | Route                           | Length |
# |---------------------------------|---------------------------------|--------|
# |---------------------------------|---------------------------------|--------|

# = PAIRING VIOLATIONS =========================================================
# | Unpaired length limit  3.60                                                |
# |                               |PinPair |     Pairing     |    Unpaired     |
# |  Net        | # Vias | Length |Distance| Best   |  | Length |Percent |
# |-------------|--------|--------|--------|--------|--------|--------|--------|
# |FLASH_1p0[2] |       5| 1156.69|   17.68| 1147.86| 1143.24|    4.62|     0.4|
# |-------------|--------|--------|--------|--------|--------|--------|--------|

# = PAIR STATISTICS ============================================================
# |----------------------------------------------------------------------------|
# | PAIR: 1
# |----------------------------------------------------------------------------|
# | Net: FLASH_1p0[2]
# |----------------------------------------------------------------------------|
# |    Metal1 | #Vias:    0 | Wire Length:    0.00
# |    Metal2 | #Vias:    0 | Wire Length:  452.88
# |    Metal3 | #Vias:    5 | Wire Length:  703.81
# |    Metal4 | #Vias:    0 | Wire Length:    0.00
# |    Metal5 | #Vias:    0 | Wire Length:    0.00
# |    Metal6 | #Vias:    0 | Wire Length:    0.00
# |    Metal7 | #Vias:    0 | Wire Length:    0.00
# |    Metal8 | #Vias:    0 | Wire Length:    0.00
# |    Metal9 | #Vias:    0 | Wire Length:    0.00
# | Total Vias:           5 | Total Wire Length: 1156.69
# |----------------------------------------------------------------------------|
# | Net: FLASH_1p0[1]
# |----------------------------------------------------------------------------|
# |    Metal1 | #Vias:    0 | Wire Length:    0.00
# |    Metal2 | #Vias:    0 | Wire Length:  452.80
# |    Metal3 | #Vias:    5 | Wire Length:  701.77
# |    Metal4 | #Vias:    0 | Wire Length:    0.00
# |    Metal5 | #Vias:    0 | Wire Length:    0.00
# |    Metal6 | #Vias:    0 | Wire Length:    0.00
# |    Metal7 | #Vias:    0 | Wire Length:    0.00
# |    Metal8 | #Vias:    0 | Wire Length:    0.00
# |    Metal9 | #Vias:    0 | Wire Length:    0.00
# | Total Vias:           5 | Total Wire Length: 1154.57
# |----------------------------------------------------------------------------
# | Differences per layer for this pair:
# |----------------------------------------------------------------------------|
# |    Metal1 | Delta Vias:    0 | Delta Wire Length:    0.00
# |    Metal2 | Delta Vias:    0 | Delta Wire Length:    0.08
# |    Metal3 | Delta Vias:    0 | Delta Wire Length:    2.04
# |    Metal4 | Delta Vias:    0 | Delta Wire Length:    0.00
# |    Metal5 | Delta Vias:    0 | Delta Wire Length:    0.00
# |    Metal6 | Delta Vias:    0 | Delta Wire Length:    0.00
# |    Metal7 | Delta Vias:    0 | Delta Wire Length:    0.00
# |    Metal8 | Delta Vias:    0 | Delta Wire Length:    0.00
# |    Metal9 | Delta Vias:    0 | Delta Wire Length:    0.00

Related Topics

Specialty Route Commands

pair_report_stats

Pair Routing Commands

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