[Thread] Add thread local variable ThreadContext #7234
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be/src/runtime/thread_context.h
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| // So, kudu Class-scoped static thread local implementation was introduced. Solve the above problem by | ||
| // Thread-scopedthread local + Class-scoped thread local. | ||
| // | ||
| // This may look very track, but it's the best way I can find. |
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| // This may look very track, but it's the best way I can find. | |
| // This may look very trick, but it's the best way I can find. |
be/src/runtime/thread_context.h
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| public: | ||
| explicit AttachTaskThread(const ThreadContext::TaskType& type, const std::string& task_id, | ||
| const TUniqueId& fragment_instance_id) { | ||
| DCHECK(task_id != "" && fragment_instance_id != TUniqueId()); |
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If this is not a query task , the fragment_instance_id maybe empty.
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. |
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If this file is copied from other project, better add a comment.
Same as other file in this PR.
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done, in threadlocal.h
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…he#7234) The thread context saves some info about a working thread. 1. thread_id: Current thread id, Auto generated. 2. type: The type is a enum value indicating which type of task current thread is running. For example: QUERY, LOAD, COMPACTION, ... 3. task id: A unique id to identify this task. maybe query id, load job id, etc. Using gcc11 compiles thread_local variable on lower versions of GLIBC will report an error, see apache#7911 This is very difficult to solve, so kudu Class-scoped static thread local implementation was introduced. Solve the above problem by Thread-scopedthread local + Class-scoped thread local. See the comments for ThreadContextPtr for details.
morningman
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The thread context saves some info about a working thread.
1. thread_id: Current thread id, Auto generated.
2. type: The type is a enum value indicating which type of task current thread is running.
For example: QUERY, LOAD, COMPACTION, ...
3. task id: A unique id to identify this task. maybe query id, load job id, etc.
Using gcc11 compiles thread_local variable on lower versions of GLIBC will report an error, see #7911
This is very difficult to solve, so kudu Class-scoped static thread local implementation was introduced.
Solve the above problem by Thread-scopedthread local + Class-scoped thread local.
See the comments for ThreadContextPtr for details.
morningman
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zhengte
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…he#7234) The thread context saves some info about a working thread. 1. thread_id: Current thread id, Auto generated. 2. type: The type is a enum value indicating which type of task current thread is running. For example: QUERY, LOAD, COMPACTION, ... 3. task id: A unique id to identify this task. maybe query id, load job id, etc. Using gcc11 compiles thread_local variable on lower versions of GLIBC will report an error, see apache#7911 This is very difficult to solve, so kudu Class-scoped static thread local implementation was introduced. Solve the above problem by Thread-scopedthread local + Class-scoped thread local. See the comments for ThreadContextPtr for details.
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Proposed changes
The thread context saves some info about a working thread.
For example: QUERY, LOAD, COMPACTION, ...
Using gcc11 compiles thread_local variable on lower versions of GLIBC will report an error, see #7911
This is very difficult to solve, so kudu Class-scoped static thread local implementation was introduced. Solve the above problem by Thread-scopedthread local + Class-scoped thread local. See the comments for ThreadContextPtr for details.
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