[SYCL] Specify a modifiable graph as having device specific nodes #83
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EwanC
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Feb 28, 2023
Bensuo
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Mar 6, 2023
reble
reviewed
Mar 10, 2023
Modifies the API and behaviour of a command_graph to enable a single modifiable command_graph to contain commands targeting different devices. See #7 for discussion.
The `syclDevice` parameter to `add()` is now described as being the device used to process `cgf`.
EwanC
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reble
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Mar 20, 2023
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It might make sense to break this patch down into two. One that has all changes to existing functions, without support for multiple devices per graph. And a second patch that removes this restriction. |
EwanC
commented
Mar 22, 2023
Done that now, although I have one discussion point about where to throw the error if a user does try to use multiple devices - #83 (comment) PR with second patch is at #107 |
reble
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Mar 22, 2023
reble
reviewed
Mar 22, 2023
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LGTM. You might want to rename the PR to avoid confusion. |
Co-authored-by: Pablo Reble <pablo.reble@intel.com>
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EwanC
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Mar 30, 2023
Based on feedback from the Working Group it is clearer to represent the current single device characteristic of a graph by passing a device to the graph constructor that all nodes will target. Then remove the `device` parameter from the explicit API, as it can be added as an overload in a future revision due to experimental nature of the extension A diff of these changes against the commit prior to when the [original multi-device PR](#83) went in can be seen [here](28acfa8...reble:llvm:ewan/single_device)
EwanC
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Based on feedback from the Working Group it is clearer to represent the current single device characteristic of a graph by passing a device to the graph constructor that all nodes will target. Then remove the `device` parameter from the explicit API, as it can be added as an overload in a future revision due to experimental nature of the extension A diff of these changes against the commit prior to when the [original multi-device PR](#83) went in can be seen [here](28acfa8...reble:llvm:ewan/single_device)
mfrancepillois
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Oct 2, 2023
…… (#67069) We noticed some performance issue while in lldb-vscode for grabing the name of the SBValue. Profiling shows SBValue::GetName() can cause synthetic children provider of shared/unique_ptr to deference underlying object and complete it type. This patch lazily moves the dereference from synthetic child provider's Update() method to GetChildAtIndex() so that SBValue::GetName() won't trigger the slow code path. Here is the culprit slow code path: ``` ... frame #59: 0x00007ff4102e0660 liblldb.so.15`SymbolFileDWARF::CompleteType(this=<unavailable>, compiler_type=0x00007ffdd9829450) at SymbolFileDWARF.cpp:1567:25 [opt] ... frame #67: 0x00007ff40fdf9bd4 liblldb.so.15`lldb_private::ValueObject::Dereference(this=0x0000022bb5dfe980, error=0x00007ffdd9829970) at ValueObject.cpp:2672:41 [opt] frame #68: 0x00007ff41011bb0a liblldb.so.15`(anonymous namespace)::LibStdcppSharedPtrSyntheticFrontEnd::Update(this=0x000002298fb94380) at LibStdcpp.cpp:403:40 [opt] frame #69: 0x00007ff41011af9a liblldb.so.15`lldb_private::formatters::LibStdcppSharedPtrSyntheticFrontEndCreator(lldb_private::CXXSyntheticChildren*, std::shared_ptr<lldb_private::ValueObject>) [inlined] (anonymous namespace)::LibStdcppSharedPtrSyntheticFrontEnd::LibStdcppSharedPtrSyntheticFrontEnd(this=0x000002298fb94380, valobj_sp=<unavailable>) at LibStdcpp.cpp:371:5 [opt] ... frame #78: 0x00007ff40fdf6e42 liblldb.so.15`lldb_private::ValueObject::CalculateSyntheticValue(this=0x000002296c66a500) at ValueObject.cpp:1836:27 [opt] frame #79: 0x00007ff40fdf1939 liblldb.so.15`lldb_private::ValueObject::GetSyntheticValue(this=<unavailable>) at ValueObject.cpp:1867:3 [opt] frame #80: 0x00007ff40fc89008 liblldb.so.15`ValueImpl::GetSP(this=0x0000022c71b90de0, stop_locker=0x00007ffdd9829d00, lock=0x00007ffdd9829d08, error=0x00007ffdd9829d18) at SBValue.cpp:141:46 [opt] frame #81: 0x00007ff40fc7d82a liblldb.so.15`lldb::SBValue::GetSP(ValueLocker&) const [inlined] ValueLocker::GetLockedSP(this=0x00007ffdd9829d00, in_value=<unavailable>) at SBValue.cpp:208:21 [opt] frame #82: 0x00007ff40fc7d817 liblldb.so.15`lldb::SBValue::GetSP(this=0x00007ffdd9829d90, locker=0x00007ffdd9829d00) const at SBValue.cpp:1047:17 [opt] frame #83: 0x00007ff40fc7da6f liblldb.so.15`lldb::SBValue::GetName(this=0x00007ffdd9829d90) at SBValue.cpp:294:32 [opt] ... ``` Differential Revision: https://reviews.llvm.org/D159542
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Modifies the API and behaviour of a command_graph to enable a single modifiable command_graph to contain commands targeting different devices.
See #7 for motivation.
Marked Draft for now as this requires discussion.