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Prevent race condition in accelerator copies management #575

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merged 2 commits into from
Oct 19, 2023
Merged

Prevent race condition in accelerator copies management #575

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ac4799d
Fix the device statistics.
bosilca Oct 2, 2023
f69460c
Prevent race condition in accelerator copies management
bosilca Sep 30, 2023
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6 changes: 2 additions & 4 deletions parsec/data.c
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Original file line number Diff line number Diff line change
Expand Up @@ -329,11 +329,11 @@ int parsec_data_start_transfer_ownership_to_copy(parsec_data_t* data,

copy = data->device_copies[device];
assert( NULL != copy );

PARSEC_DEBUG_VERBOSE(10, parsec_debug_output,
"DEV[%d]: start transfer ownership of data %p to copy %p in mode %d",
device, data, copy, access_mode);

switch( copy->coherency_state ) {
case PARSEC_DATA_COHERENCY_INVALID:
transfer_required = 1;
Expand Down Expand Up @@ -415,8 +415,6 @@ int parsec_data_start_transfer_ownership_to_copy(parsec_data_t* data,
}
}

assert( (!transfer_required) || (data->device_copies[valid_copy]->version >= copy->version) );

if( PARSEC_FLOW_ACCESS_READ & access_mode ) {
copy->readers++;
}
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