Hi Ali, The problem is reproducible. I think a x86 FS boot will make the error.
In my current setup the checkpoint is made at time tick 1915819058000. The curTick() yields 1915819058000, but _when is only 1875000000000, causing the bad value. Just saving the _when value might work, but I think it will just cause an event scheduled in the past error. But I will need to test. / Anders On Sat, Jan 21, 2012 at 4:43 PM, Ali Saidi <sa...@umich.edu> wrote: > Hi Anders, > > No clue. It looks like Nilay last edited that code 3 months ago. So maybe > he can shed some light on it. Is the problem reproducible in the > checkpoints? > > tickEvent is scheduled when the device is created and isn't ever > de-scheduled, so it should always have a positive value. > > _when is positive in the checkpoint, correct? > > because it's rescheduled for curTIck() + _when which would then always be > positive. We certainly shouldn't be saving a negative tick value in the > checkpoint file and I'm a little confused as to why we bother subtracting > curTick in the serialize() method and adding it back in the unserialize(). > Just leaving it alone should be good enough. > > Thanks, > Ali > > > On Jan 19, 2012, at 4:51 AM, Anders Handler wrote: > > > Hi, > > > > When I create a checkpoint I get a negative value stored in > rtcClockTickOffset, which will make Gem5 crash when restoring the > checkpoint, complaining that an event cannot be scheduled in the past. > > > > The failure is that the "RTCEvent event" holds an old tick value (_when) > which I think it should not. The code is in: > > src/dev/mc146818.hh > > src/dev/mc146818.cc > > > > The workaround I am using is manually removing the "-" from the > rtcClockTickOffset variable in the checkpoint file (m5.cpt). > > > > I run x86. > > > > Anyone has a clue how to fix? > > > > Best regards > > Anders > > _______________________________________________ > > gem5-users mailing list > > gem5-users@gem5.org > > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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