soloktanjung
Full Member level 6
Hi,
Here is my problem during place and route stage regarding placement density:
Before placement = 60%
Optdesign -prects = 67%
optdesign -prects -incr = 75%
optdesign -postcts = 79%
optdesign -postcts -incr = 81%
optdesign -postcts -hold = 95%
Timing analysis after optdesign -postcts -hold:
I cannot continue with nanoroute because of 95% density. Here is my constraints:
Synthesis constraint: 2.2 ns clock period (-0.57 ns slack)
place and route constraint: 2.5 ns clock period
I'm working on block level implementation now, die area is 700 um x 500 um.
Is there any problem with my constraint or with the floorplan? Any advice please?
Here is my problem during place and route stage regarding placement density:
Before placement = 60%
Optdesign -prects = 67%
optdesign -prects -incr = 75%
optdesign -postcts = 79%
optdesign -postcts -incr = 81%
optdesign -postcts -hold = 95%
Timing analysis after optdesign -postcts -hold:
Code:
------------------------------------------------------------
optDesign Final Summary
------------------------------------------------------------
+--------------------+---------+---------+---------+---------+---------+---------+
| Setup mode | all | reg2reg | in2reg | reg2out | in2out | clkgate |
+--------------------+---------+---------+---------+---------+---------+---------+
| WNS (ns):| -1.055 | -0.797 | -1.055 | -0.721 | 4.389 | N/A |
| TNS (ns): | -1521.3 |-232.758| -1397.5 | -30.677 | 0.000 | N/A |
| Violating Paths:| 3215 | 1251 | 2332 | 131 | 0 | N/A |
| All Paths: | 4559 | 3152 | 2473 | 288 | 16 | N/A |
+--------------------+---------+---------+---------+---------+---------+---------+
+--------------------+---------+---------+---------+---------+---------+---------+
| Hold mode | all | reg2reg | in2reg | reg2out | in2out | clkgate |
+--------------------+---------+---------+---------+---------+---------+---------+
| WNS (ns):| -0.761 | -0.246 | 1.088 | -0.761 | 0.847 | N/A |
| TNS (ns): | -85.824 | -13.244 | 0.000 | -72.580| 0.000 | N/A |
| Violating Paths:| 474 | 210 | 0 | 264 | 0 | N/A |
| All Paths: | 4558 | 3151 | 2472 | 288 | 16 | N/A |
+--------------------+---------+---------+---------+---------+---------+---------+
I cannot continue with nanoroute because of 95% density. Here is my constraints:
Synthesis constraint: 2.2 ns clock period (-0.57 ns slack)
place and route constraint: 2.5 ns clock period
I'm working on block level implementation now, die area is 700 um x 500 um.
Is there any problem with my constraint or with the floorplan? Any advice please?