[Boost-bugs] [Boost C++ Libraries] #10496: 100% cpu usage when reading serial port on MacOSX

Subject: [Boost-bugs] [Boost C++ Libraries] #10496: 100% cpu usage when reading serial port on MacOSX
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-09-11 21:32:48

#10496: 100% cpu usage when reading serial port on MacOSX
-------------------------------------------+----------------------------
 Reporter:  Christopher Moore <crmoore@…>  |      Owner:  chris_kohlhoff
     Type:  Bugs                           |     Status:  new
Milestone:  To Be Determined               |  Component:  asio
  Version:  Boost 1.56.0                   |   Severity:  Problem
 Keywords:                                 |
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 Simple test program is attached.  All it does is setup a serial port and
 start waiting for data.  It prints the first data it receives, and quits.
 It is using 100% cpu (according to activity monitor).

 I've tried with the following serial ports: silab usb adapter, prolific
 usb adapter, and pty with master attached to socat.

 The profiler puts most of the time in ```kevent``` called from
 ```boost::asio::detail::kqueue_reactor::run(bool,
 boost::asio::detail::op_queue<boost::asio::detail::task_io_service_operation>&)```

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/10496>
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