The current message queue implementation is very inefficient if you are using
many active ports with few messages. This happens when you use 'call' a lot
on ports which is currently done in dart:io.
This patch does not remove messages from the queue when closing a port. Instead
it drops messages for closed ports when it processes them. This dramatically
speeds up dart:io benchmarks that enqueue tons of writes on a file output
stream.
R=iposva@google.com
BUG=http://dartbug.com/6911
Review URL: https://codereview.chromium.org//11440035
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@16388 260f80e4-7a28-3924-810f-c04153c831b5
external length available. We now pass a length with all messages in
the vm and verify that there is no mismatch with the length from the
Snapshot.
Fixed a bug in the use of ApiMessageReader. We were always manually
adding Snapshot::kHeaderSize to the data, but neglecting to subtract
kHeaderSize from the message length.
Added FullSnapshotWriter and MessageWriter classes.
Review URL: https://chromiumcodereview.appspot.com//10829444
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@11413 260f80e4-7a28-3924-810f-c04153c831b5
each isolate or native port had a dedicated thread.
Refactored the MessageHandler api...
- Added a Run function to allow a MessageHandler to run on a
ThreadPool. These functions take a start and end callback to allow for
isolate initialization and shutdown.
- Made the queue private to the MessageHandler and moved all message
processing code inside the MessageHandler (got rid of all of the
different flavors of RunLoop). This helps remove some code
duplication and hides the details of how messages are handled.
- Moved all locking and notification out of MessageQueue and moved it
up to MessageHandler. Moved OOB support out of MessageQueue and up
to MessageHandler. These changes make the MessageQueue much
simpler.
- Refactored native port and isolate MessageHandlers to share more code.
- Improved --trace_isolates output.
- Added tests for MessageHandler.
Refactored lib/isolate code...
- Use the new MessageHandler::Run api.
- Got rid of the LongJump stuff in RunIsolate. No longer needed.
- Use the new StartIsolateScope/SwitchIsolateScope to make the code
less verbose and less error-prone.
- Store top-level isolate errors in the sticky_error.
Added StartIsolateScope/SwitchIsolateScope classes.
Review URL: https://chromiumcodereview.appspot.com//9924015
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@6762 260f80e4-7a28-3924-810f-c04153c831b5
Dart_NewNativePort creates a port associated with a C handler
function. When messages come in on this port, they are forwarded to
the C function for processing.
To support this, refactored PortMap so that it operates on a new
MessageHandler type instead of directly on Isolates.
For now, native ports have a dedicated single thread. Eventually we
will back native ports (and possibly Isolates as well) by a shared
thread pool.
Review URL: https://chromiumcodereview.appspot.com//9169063
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@3804 260f80e4-7a28-3924-810f-c04153c831b5
johnmccutchan@google.com