[fix](cooldown)No need to rdlock inside get_cooldown_tablets, there's enough rdlock inside tablet internal function calls. #39211
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…rdlock inside tablet internal function calls.
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Thank you for your contribution to Apache Doris. Since 2024-03-18, the Document has been moved to doris-website. |
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clang-tidy review says "All clean, LGTM! 👍" |
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run buildall |
TPC-H: Total hot run time: 39925 ms |
TPC-DS: Total hot run time: 201114 ms |
ClickBench: Total hot run time: 30.84 s |
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run beut |
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run buildall |
TPC-H: Total hot run time: 39706 ms |
TPC-DS: Total hot run time: 201213 ms |
ClickBench: Total hot run time: 31.34 s |
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run cloud_p1 |
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run external |
gavinchou
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Aug 30, 2024
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PR approved by anyone and no changes requested. |
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Proposed changes
There's a recurse rdlock inside get_cooldown；when using libcxx，libcxx‘s shared_mutex dosen't support recursive lock, so causes hangs below:
#0 0x00007f788b101a35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1 0x00005636b8ff996f in std::__1::condition_variable::wait(std::__1::unique_lockstd::__1::mutex&) ()
#2 0x00005636b8ffad8b in std::__1::__shared_mutex_base::lock_shared() ()
#3 0x00005636addc524c in doris::Tablet::_has_data_to_cooldown() ()
#4 0x00005636addc353b in doris::Tablet::pick_cooldown_rowset() ()
#5 0x00005636addc56b9 in doris::Tablet::need_cooldown(long*, unsigned long*) ()
#6 0x00005636adde52f7 in doris::TabletManager::get_cooldown_tablets(std::__1::vector<std::__1::shared_ptrdoris::Tablet, std::__1::allocator<std::__1::shared_ptrdoris::Tablet > >, std::__1::vector<std::__1::shared_ptrdoris::Rowset, std::__1::allocator<std::__1::shared_ptrdoris::Rowset > >, std::__1::function<bool (std::__1::shared_ptrdoris::Tablet const&)>) ()
#7 0x00005636adb0ed81 in doris::StorageEngine::_cooldown_tasks_producer_callback() ()
#8 0x00005636ae17a253 in doris::Thread::supervise_thread(void*) ()
#9 0x00007f788b0fdea5 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f788b916b0d in clone () from /lib64/libc.so.6
review the code, there's no need a rdlock inside TabletManager::get_cooldown_tablets