The entropy_in_IC flag is now set and read correctly. Restart from snapshot is possible.

Fix to #178 (closed).

This is a rather temporary fix but allows full compatibility with Gadget. We can now restart from a snapshot and also run for a while with Gadget, then with SWIFT, then with Gadget and so on.

When I try to restart using a snapshot captured from a previous MPI run, I see the following.

Velocity of sod_000.hdf5:

Velocity of sod_002.hdf5:

so there is now a strange set of bands not seen in the original.

Command was:

mpirun -np 4 ../swift_mpi -t 4 -s sodShock.yml

This is definitely not seen if you start from the usual initial conditions.

What do you mean by "captured from a previous MPI run" ? Do you mean a run prior to this change ?

This new version sets a flag in the snapshots in order for a restart to work. Restarting from snapshots that don't have this flag will not work.

What do you mean by "captured from a previous MPI run" ?

Just the run previous to this one, so both done today, with your new code.

Thanks, what about the difference in shades of blue ? Is this all on the same scale ?

Yes, these both have the same scale (with a log to enhance the detail).

Ok. Is this the serial or parallel version of the HDF5 library ?

I compiled this using swift/c5/intel/intelmpi/5.1.2, so serial.

Added 1 commit:

• e2429c8d - Missing broadcast

Would actually broadcasting the flag that has just been read help ?

Yes, that seems to have fixed that problems. Thanks.

Wonderful, thanks.

Seems to be working in all my tests, so accepting.

Status changed to merged

mentioned in commit 539df206

mentioned in issue #178 (closed)