[UR] Fix usm pools creation failure at context initialization #20054
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…19921) Context creation was failing when sub-sub-devices were exposed, because the Level Zero adapter attempted to add multiple USM pools with identical descriptors. This occurred since, for the L0 backend, sub-sub-devices and their parent sub-devices share the same Level Zero device handle and should use the same USM pool. This PR resolves the issue by ensuring only devices with unique Level Zero handles are collected for USM pool creation, preventing duplicate pools. Additionally, this PR fixes an issue with an uninitialized `ur_device_partition_property_t` variable passed to UR. Previously, this could result in an unexpected value for `value.affinity_domain` when the property type was `UR_DEVICE_PARTITION_BY_CSLICE` resulting on error from adapter.
AlexeySachkov
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AlexeySachkov
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AlexeySachkov
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pbalcer
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Sep 11, 2025
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This is a cherry-pick of #19921
Context creation was failing when sub-sub-devices were exposed, because the Level Zero adapter attempted to add multiple USM pools with identical descriptors. This occurred since, for the L0 backend, sub-sub-devices and their parent sub-devices share the same Level Zero device handle and should use the same USM pool.
This PR resolves the issue by ensuring only devices with unique Level Zero
handles are collected for USM pool creation, preventing duplicate pools.
Additionally, this PR fixes an issue with an uninitialized
ur_device_partition_property_tvariable passed to UR. Previously, this could result in an unexpected value forvalue.affinity_domainwhen the property type wasUR_DEVICE_PARTITION_BY_CSLICEresulting on error fromadapter.