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Simulators >> Circuit Simulators >> SPECTRE : saving and recovering checkpoints ?
https://designers-guide.org/forum/YaBB.pl?num=1200578469

Message started by olifant on Jan 17^th, 2008, 6:01am

Title: SPECTRE : saving and recovering checkpoints ?
Post by olifant on Jan 17^th, 2008, 6:01am

Although the SPECTRE simulator manual states that it is possible save checkpoints (using the +checkpoint command line option), in order to recover them later on (using the +recover command line option), this does not seem to work. The checkpoint gets saved alright (input.scs.tran.ckpt), but when I try to restore it, the simulator locks up. The output log shows the following (see below) and then freezes. I'm trying to use the checkpoints since I am running simulations which need a long time to converge: I tried to speed this up by using initial conditions ("readic=spectre.fc" in the netlist, where spectre.fc is the file containing the initial conditions at the end of the previous simulation), but this does not give very accurate results, even if I tie up the tolerances. Any suggestions ? Thanks in advance for the help.

***********************************************
Transient Analysis `tran': time = (0 s -> 1 ms)
***********************************************
Recovering from checkpoint file input.scs.tran.ckpt
Restarting at time 378.059 us.