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#1946 - Adding clarification in docs about the HashedWheelTimer semantics

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Viktor Klang 2012-04-23 14:30:28 +02:00
parent 4204b31759
commit 8df2314bb3
3 changed files with 15 additions and 1 deletions
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2
akka-actor/src/main/resources/reference.conf
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@ -295,7 +295,7 @@ akka {
# Used to set the behavior of the scheduler. # Used to set the behavior of the scheduler.
# Changing the default values may change the system behavior drastically so make sure # Changing the default values may change the system behavior drastically so make sure
# you know what you're doing! # you know what you're doing! See the Scheduler section of the Akka documentation for more details.
scheduler { scheduler {
# The HashedWheelTimer (HWT) implementation from Netty is used as the default scheduler # The HashedWheelTimer (HWT) implementation from Netty is used as the default scheduler
# in the system. # in the system.

7
akka-docs/java/scheduler.rst
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@ -15,6 +15,13 @@ You can schedule sending of messages to actors and execution of tasks (functions
You will get a ``Cancellable`` back that you can call :meth:`cancel` on to cancel the execution of the You will get a ``Cancellable`` back that you can call :meth:`cancel` on to cancel the execution of the
scheduled operation. scheduled operation.
.. warning::
The default implementation of ``Scheduler`` used by Akka is based on the Netty ``HashedWheelTimer``.
It does not execute tasks at the exact time, but on every tick, it will run everything that is overdue.
The accuracy of the default Scheduler can be modified by the "ticks-per-wheel" and "tick-duration" configuration
properties. For more information, see: `HashedWheelTimers <http://www.cse.wustl.edu/~cdgill/courses/cs6874/TimingWheels.ppt>`_.
Some examples Some examples
------------- -------------

7
akka-docs/scala/scheduler.rst
View file

@ -15,6 +15,13 @@ You can schedule sending of messages to actors and execution of tasks (functions
You will get a ``Cancellable`` back that you can call :meth:`cancel` on to cancel the execution of the You will get a ``Cancellable`` back that you can call :meth:`cancel` on to cancel the execution of the
scheduled operation. scheduled operation.
.. warning::
The default implementation of ``Scheduler`` used by Akka is based on the Netty ``HashedWheelTimer``.
It does not execute tasks at the exact time, but on every tick, it will run everything that is overdue.
The accuracy of the default Scheduler can be modified by the "ticks-per-wheel" and "tick-duration" configuration
properties. For more information, see: `HashedWheelTimers <http://www.cse.wustl.edu/~cdgill/courses/cs6874/TimingWheels.ppt>`_.
Some examples Some examples
------------- -------------