mirror of
https://github.com/wjakob/tbb.git
synced 2026-08-30 09:00:40 +08:00
Hans Johnson
e32d75f876
The new release TBB is now under a new more
open license.
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
The list of most significant changes made over time in
Intel(R) Threading Building Blocks (Intel(R) TBB).
Intel TBB 2017
TBB_INTERFACE_VERSION == 9100
Changes (w.r.t. Intel TBB 4.4 Update 5):
- static_partitioner class is now a fully supported feature.
- async_node class is now a fully supported feature.
- Improved dynamic memory allocation replacement on Windows* OS to skip
DLLs for which replacement cannot be done, instead of aborting.
- Intel TBB no longer performs dynamic memory allocation replacement
for Microsoft* Visual Studio* 2008.
- For 64-bit platforms, quadrupled the worst-case limit on the amount
of memory the Intel TBB allocator can handle.
- Added TBB_USE_GLIBCXX_VERSION macro to specify the version of GNU
libstdc++ when it cannot be properly recognized, e.g. when used
with Clang on Linux* OS. Inspired by a contribution from David A.
- Added graph/stereo example to demostrate tbb::flow::async_msg.
- Removed a few cases of excessive user data copying in the flow graph.
- Reworked split_node to eliminate unnecessary overheads.
- Added support for C++11 move semantics to the argument of
tbb::parallel_do_feeder::add() method.
- Added C++11 move constructor and assignment operator to
tbb::combinable template class.
- Added tbb::this_task_arena::max_concurrency() function and
max_concurrency() method of class task_arena returning the maximal
number of threads that can work inside an arena.
- Deprecated tbb::task_arena::current_thread_index() static method;
use tbb::this_task_arena::current_thread_index() function instead.
- All examples for commercial version of library moved online:
https://software.intel.com/en-us/product-code-samples. Examples are
available as a standalone package or as a part of Intel(R) Parallel
Studio XE or Intel(R) System Studio Online Samples packages.
Changes affecting backward compatibility:
- Renamed following methods and types in async_node class:
Old New
async_gateway_type => gateway_type
async_gateway() => gateway()
async_try_put() => try_put()
async_reserve() => reserve_wait()
async_commit() => release_wait()
- Internal layout of some flow graph nodes has changed; recompilation
is recommended for all binaries that use the flow graph.
Preview Features:
- Added template class streaming_node to the flow graph API. It allows
a flow graph to offload computations to other devices through
streaming or offloading APIs.
- Template class opencl_node reimplemented as a specialization of
streaming_node that works with OpenCL*.
- Added tbb::this_task_arena::isolate() function to isolate execution
of a group of tasks or an algorithm from other tasks submitted
to the scheduler.
Bugs fixed:
- Added a workaround for GCC bug #62258 in std::rethrow_exception()
to prevent possible problems in case of exception propagation.
- Fixed parallel_scan to provide correct result if the initial value
of an accumulator is not the operation identity value.
- Fixed a memory corruption in the memory allocator when it meets
internal limits.
- Fixed the memory allocator on 64-bit platforms to align memory
to 16 bytes by default for all allocations bigger than 8 bytes.
- As a workaround for crashes in the Intel TBB library compiled with
GCC 6, added -flifetime-dse=1 to compilation options on Linux* OS.
- Fixed a race in the flow graph implementation.
Open-source contributions integrated:
- Enabling use of C++11 'override' keyword by Raf Schietekat.
------------------------------------------------------------------------
186 lines
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186 lines
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Public Member Functions</h2></td></tr>
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<tr class="memitem:a40209b347e3c82bb5bfda05941304309"><td class="memItemLeft" align="right" valign="top">void __TBB_EXPORTED_METHOD </td><td class="memItemRight" valign="bottom"><a class="el" href="a00147.html#a40209b347e3c82bb5bfda05941304309">observe</a> (bool state=true)</td></tr>
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<tr class="memdesc:a40209b347e3c82bb5bfda05941304309"><td class="mdescLeft"> </td><td class="mdescRight">Enable or disable observation. <a href="#a40209b347e3c82bb5bfda05941304309">More...</a><br/></td></tr>
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<tr class="separator:a40209b347e3c82bb5bfda05941304309"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a31abaf256f7172f010cfb2259c7787bb"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a31abaf256f7172f010cfb2259c7787bb"></a>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00147.html#a31abaf256f7172f010cfb2259c7787bb">is_observing</a> () const </td></tr>
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<tr class="memdesc:a31abaf256f7172f010cfb2259c7787bb"><td class="mdescLeft"> </td><td class="mdescRight">Returns true if observation is enabled, false otherwise. <br/></td></tr>
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<tr class="separator:a31abaf256f7172f010cfb2259c7787bb"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a25bffb05efaaab36bc58590969e29745"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a25bffb05efaaab36bc58590969e29745"></a>
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 </td><td class="memItemRight" valign="bottom"><a class="el" href="a00147.html#a25bffb05efaaab36bc58590969e29745">task_scheduler_observer_v3</a> ()</td></tr>
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<tr class="memdesc:a25bffb05efaaab36bc58590969e29745"><td class="mdescLeft"> </td><td class="mdescRight">Construct observer with observation disabled. <br/></td></tr>
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<tr class="separator:a25bffb05efaaab36bc58590969e29745"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:af4282a27725fbe86052bb785bdd9c5d3"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00147.html#af4282a27725fbe86052bb785bdd9c5d3">on_scheduler_entry</a> (bool)</td></tr>
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<tr class="memdesc:af4282a27725fbe86052bb785bdd9c5d3"><td class="mdescLeft"> </td><td class="mdescRight">Entry notification. <a href="#af4282a27725fbe86052bb785bdd9c5d3">More...</a><br/></td></tr>
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<tr class="memitem:a657e90f833568e217b807d0122fa7668"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00147.html#a657e90f833568e217b807d0122fa7668">on_scheduler_exit</a> (bool)</td></tr>
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<tr class="memdesc:a657e90f833568e217b807d0122fa7668"><td class="mdescLeft"> </td><td class="mdescRight">Exit notification. <a href="#a657e90f833568e217b807d0122fa7668">More...</a><br/></td></tr>
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<tr class="memitem:a151e475ebba39172fcc13f43bed426cc"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a151e475ebba39172fcc13f43bed426cc"></a>
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virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="a00147.html#a151e475ebba39172fcc13f43bed426cc">~task_scheduler_observer_v3</a> ()</td></tr>
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<tr class="memdesc:a151e475ebba39172fcc13f43bed426cc"><td class="mdescLeft"> </td><td class="mdescRight">Destructor automatically switches observation off if it is enabled. <br/></td></tr>
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Friends</h2></td></tr>
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class </td><td class="memItemRight" valign="bottom"><b>observer_proxy</b></td></tr>
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class </td><td class="memItemRight" valign="bottom"><b>observer_list</b></td></tr>
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class </td><td class="memItemRight" valign="bottom"><b>interface6::task_scheduler_observer</b></td></tr>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void __TBB_EXPORTED_METHOD tbb::internal::task_scheduler_observer_v3::observe </td>
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<td>(</td>
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<td class="paramtype">bool </td>
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<td class="paramname"><em>state</em> = <code>true</code>)</td><td></td>
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<p>Enable or disable observation. </p>
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<p>For local observers the method can be used only when the current thread has the task scheduler initialized or is attached to an arena.</p>
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<p>Repeated calls with the same state are no-ops. </p>
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<p>Referenced by <a class="el" href="a00146.html#ad5b33790cea52c61e1fb004a8ed26365">tbb::interface6::task_scheduler_observer::observe()</a>, and <a class="el" href="a00147.html#a151e475ebba39172fcc13f43bed426cc">~task_scheduler_observer_v3()</a>.</p>
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<td class="memname">virtual void tbb::internal::task_scheduler_observer_v3::on_scheduler_entry </td>
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<td>(</td>
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<p>Entry notification. </p>
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<p>Invoked from inside observe(true) call and whenever a worker enters the arena this observer is associated with. If a thread is already in the arena when the observer is activated, the entry notification is called before it executes the first stolen task.</p>
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<p>Obsolete semantics. For global observers it is called by a thread before the first steal since observation became enabled. </p>
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<td class="memname">virtual void tbb::internal::task_scheduler_observer_v3::on_scheduler_exit </td>
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<td>(</td>
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<p>Exit notification. </p>
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<p>Invoked from inside observe(false) call and whenever a worker leaves the arena this observer is associated with.</p>
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<p>Obsolete semantics. For global observers it is called by a thread before the first steal since observation became enabled. </p>
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<hr/>The documentation for this class was generated from the following file:<ul>
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<li>task_scheduler_observer.h</li>
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</ul>
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Copyright © 2005-2016 Intel Corporation. All Rights Reserved.
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Intel, Pentium, Intel Xeon, Itanium, Intel XScale and VTune are
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* Other names and brands may be claimed as the property of others.
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