EventBase across multiple threads

[va...@pinterest.com]

Hi,

While trying to do async I/O in cpp2 using fbthrift, we ran into a strange error with EventBase. It seems that when we do an async call from a thrift client, it must be done in the same thread as the thread for the EventBase attached to the socket underlying the thrift client. Is this expected - I saw some recent documentation suggesting that indeed there are a lot of checks to make sure that we are running in the same thread as the EventBase' thread for doing operations on the EventBase. Is this by design, does evb_->runInEventBaseThread() not add additional thread switches and hence cause higher latencies etc. ?

Thanks

Varun

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