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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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Affects Version/s: 3.0.1
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Component/s: Concurrency, Internal Client
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Fully Compatible
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ALL
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None
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3
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None
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None
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None
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None
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None
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None
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None
Test is:
- 7 shard each with 3 member replicaset
- traffic is 100% read (query to return single doc)
- profiling with 3.0.1 mongos
Here is output from linux perf for mongos
- 19.95% mongos [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore
- _raw_spin_unlock_irqrestore
+ 70.21% __wake_up_sync_key
- 23.63% try_to_wake_up
wake_up_state
wake_futex
futex_wake
do_futex
sys_futex
system_call_fastpath
- __lll_unlock_wake
- 35.44% mongo::DBClientReplicaSet::getServerAddress() const
mongo::DBClientCursor::_finishConsInit()
mongo::DBClientCursor::DBClientCursor(mongo::DBClientBase*, std::string const&, mongo::BSONObj, int, int, mongo::BSONObj const*, int, int)
mongo::ParallelSortClusteredCursor::startInit()
mongo::ParallelSortClusteredCursor::fullInit()
mongo::Strategy::queryOp(mongo::Request&)
mongo::Request::process(int)
mongo::ShardedMessageHandler::process(mongo::Message&, mongo::AbstractMessagingPort*, mongo::LastError*)
mongo::PortMessageServer::handleIncomingMsg(void*)
start_thread