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Open ports in special route summary

Greatrebel

Hi All,

I got a summary after special routing below. It shows there are some ports open for stripe and core. But when I use verifyConnectivity to check, there are no violations. Is that a serious issue for PnR. How can I locate these open ports. Thanks in advanced

  Number of IO ports routed: 4
  Number of Block ports routed: 6
  Number of Stripe ports routed: 80  open: 2
  Number of Core ports routed: 185  open: 399
  Number of Power Bump ports routed: 0
  Number of Followpin connections: 292
  4 ports open due to poor power planning

Parents

  •  Hi Kari

     After I enter setDelayCalMode -engine signalStorm and run verifyACLimit, I got the aclimit report something like below for clocks 

     NET clk_net (2)   Eff Freq: 50.000000
       PIN IOIN_clk.C
          Trise: 0.062375   Tfall:  0.034250   Vdd:    2.750000
              Irms      Limit          Width/CutArea       Cap     Layer      (x y)
           0.100246 $   1.597708           0.140000     0.024240        M3    (427.560 415.520)
           0.223936 $   1.575294           0.140000     0.054150        M4    (410.620 267.715)

     NET sclk_net (133)   Eff Freq: 25.000000
       PIN IOIN_sclk.C
          Trise: 0.259625   Tfall:  0.138375   Vdd:    2.750000
              Irms      Limit          Width/CutArea       Cap     Layer      (x y)
           0.007094 $   1.575294           0.140000     0.004901        M4    (446.180 419.720)
           0.006571 $   1.597708           0.140000     0.004541        M3    (447.440 418.320)
           0.002415 $   1.597708           0.140000     0.001669        M3    (448.980 418.320)
           0.003684 $   1.575294           0.140000     0.002545        M4    (448.700 414.540)
           0.010678 $   1.575294           0.140000     0.007378        M4    (441.700 422.100)
           0.010305 $   1.597708           0.140000     0.007120        M3    (443.940 421.120)
           0.013516 $   1.597708           0.140000     0.009339        M3    (440.300 423.080)
           0.013914 $   1.575294           0.140000     0.009614        M4    (438.900 421.960)
           0.003236 $   1.575294           0.140000     0.002236        M4    (424.340 408.100)

     I had a quick lookthrough the report, did not find any Irms over  the limit. Does it mean everything is fine and I can ignore the AC limit violation reported by reportClocktree.

     

    Thanks a lot

Reply

  •  Hi Kari

     After I enter setDelayCalMode -engine signalStorm and run verifyACLimit, I got the aclimit report something like below for clocks 

     NET clk_net (2)   Eff Freq: 50.000000
       PIN IOIN_clk.C
          Trise: 0.062375   Tfall:  0.034250   Vdd:    2.750000
              Irms      Limit          Width/CutArea       Cap     Layer      (x y)
           0.100246 $   1.597708           0.140000     0.024240        M3    (427.560 415.520)
           0.223936 $   1.575294           0.140000     0.054150        M4    (410.620 267.715)

     NET sclk_net (133)   Eff Freq: 25.000000
       PIN IOIN_sclk.C
          Trise: 0.259625   Tfall:  0.138375   Vdd:    2.750000
              Irms      Limit          Width/CutArea       Cap     Layer      (x y)
           0.007094 $   1.575294           0.140000     0.004901        M4    (446.180 419.720)
           0.006571 $   1.597708           0.140000     0.004541        M3    (447.440 418.320)
           0.002415 $   1.597708           0.140000     0.001669        M3    (448.980 418.320)
           0.003684 $   1.575294           0.140000     0.002545        M4    (448.700 414.540)
           0.010678 $   1.575294           0.140000     0.007378        M4    (441.700 422.100)
           0.010305 $   1.597708           0.140000     0.007120        M3    (443.940 421.120)
           0.013516 $   1.597708           0.140000     0.009339        M3    (440.300 423.080)
           0.013914 $   1.575294           0.140000     0.009614        M4    (438.900 421.960)
           0.003236 $   1.575294           0.140000     0.002236        M4    (424.340 408.100)

     I had a quick lookthrough the report, did not find any Irms over  the limit. Does it mean everything is fine and I can ignore the AC limit violation reported by reportClocktree.

     

    Thanks a lot

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