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[UR][L0] Disable Immediate Command Lists by default on MTL/ARL Linux #20167

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Merged
merged 1 commit into from
Sep 25, 2025
Merged

[UR][L0] Disable Immediate Command Lists by default on MTL/ARL Linux #20167

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7 changes: 7 additions & 0 deletions unified-runtime/source/adapters/level_zero/device.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1790,12 +1790,19 @@ ur_device_handle_t_::useImmediateCommandLists() {
bool isDG2OrNewer = this->isIntelDG2OrNewer();
bool isDG2SupportedDriver =
this->Platform->isDriverVersionNewerOrSimilar(1, 5, 30820);
bool isIntelMTLDevice = this->isIntelMTL();
bool isIntelARLDevice = this->isIntelARL();
// Disable immediate command lists for DG2 devices on Windows due to driver
// limitations.
bool isLinux = true;
#ifdef _WIN32
isLinux = false;
#endif
// Disable immediate command lists for Intel MTL/ARL devices on Linux by
// default due to driver limitations.
if ((isIntelMTLDevice || isIntelARLDevice) && isLinux) {
return NotUsed;
}
if ((isDG2SupportedDriver && isDG2OrNewer && isLinux) || isPVC() ||
isNewerThanIntelDG2()) {
return PerQueue;
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12 changes: 12 additions & 0 deletions unified-runtime/source/adapters/level_zero/device.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,18 @@ struct ur_device_handle_t_ : ur_object {
// Checks if this GPU is an Intel Flex GPU or Intel Arc Alchemist
bool isDG2() { return (ZeDeviceProperties->deviceId & 0xff00) == 0x5600; }

bool isIntelMTL() {
return (ZeDeviceProperties->vendorId == 0x8086 &&
ZeDeviceIpVersionExt->ipVersion >= 0x03118000 &&
ZeDeviceIpVersionExt->ipVersion <= 0x0311c004);
}

bool isIntelARL() {
return (ZeDeviceProperties->vendorId == 0x8086 &&
ZeDeviceIpVersionExt->ipVersion >= 0x03128000 &&
ZeDeviceIpVersionExt->ipVersion <= 0x03128004);
}

bool isIntelDG2OrNewer() {
return (ZeDeviceProperties->vendorId == 0x8086 &&
ZeDeviceIpVersionExt->ipVersion >= 0x030dc000);
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