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Reduce final GPU host downloads

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This commit is contained in:
CGH0S7
2026-04-12 18:46:42 +08:00
parent c8977d8356
commit db2d6978b2
1 changed files with 7 additions and 9 deletions
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16
AMSS_NCKU_source/bssn_cuda_step.C
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@@ -889,15 +889,13 @@ void bssn_class::Step_MainPath_GPU(int lev, int YN)
if (!ERROR && keep_stage_sync_on_device) if (!ERROR && keep_stage_sync_on_device)
{ {
MyList<var> *final_host_lists[] = {StateList, OldStateList, SynchList_cor, SynchList_pre}; // After the swaps above, only StateList points at arrays updated during this step.
const int final_host_list_count = sizeof(final_host_lists) / sizeof(final_host_lists[0]); // OldStateList/SynchList_cor remain valid on host because their backing arrays were
for (int list_i = 0; list_i < final_host_list_count && !ERROR; ++list_i) // read-only during the RK step, and SynchList_pre is reused only as scratch later.
{ const double t0 = profile_enabled ? MPI_Wtime() : 0.0;
const double t0 = profile_enabled ? MPI_Wtime() : 0.0; stage_download_patch_list(StateList, true);
stage_download_patch_list(final_host_lists[list_i], true); if (profile_enabled)
if (profile_enabled) stage_profile_add(lev, STAGE_PROFILE_DOWNLOAD, MPI_Wtime() - t0);
stage_profile_add(lev, STAGE_PROFILE_DOWNLOAD, MPI_Wtime() - t0);
}
} }
if (profile_enabled) if (profile_enabled)