Rasmus Munk Larsen
6560692c67
Improve EventCount used by the non-blocking threadpool.
...
The current algorithm requires threads to commit/cancel waiting in order
they called Prewait. Spinning caused by that serialization can consume
lots of CPU time on some workloads. Restructure the algorithm to not
require that serialization and remove spin waits from Commit/CancelWait.
Note: this reduces max number of threads from 2^16 to 2^14 to leave
more space for ABA counter (which is now 22 bits).
Implementation details are explained in comments.
2019-02-22 13:56:26 -08:00
Rasmus Munk Larsen
93f9988a7e
A few small fixes to a) prevent throwing in ctors and dtors of the threading code, and b) supporting matrix exponential on platforms with 113 bits of mantissa for long doubles.
2018-11-09 14:15:32 -08:00
Gael Guennebaud
c696dbcaa6
Fiw shadowing of last and all
2018-09-21 23:02:33 +02:00
Christoph Hertzberg
007f165c69
bug #1598 : Let MaxSizeVector respect alignment of objects and add a unit test
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Also revert 8b3d9ed081
2018-09-14 20:21:56 +02:00
Rasmus Munk Larsen
8b3d9ed081
Use padding instead of alignment attribute, which MaxSizeVector does not respect. This leads to undefined behavior and hard-to-trace bugs.
2018-09-05 11:20:06 -07:00
Rasmus Munk Larsen
15d4f515e2
Use plain_assert in destructors to avoid throwing in CXX11 tests where main.h owerwrites eigen_assert with a throwing version.
2018-08-14 12:17:46 -07:00
Gael Guennebaud
b3fd93207b
Fix typos found using codespell
2018-06-07 14:43:02 +02:00
Benoit Steiner
13df3441ae
Use MaxSizeVector instead of std::vector: xcode sometimes assumes that std::vector allocates aligned memory and therefore issues aligned instruction to initialize it. This can result in random crashes when compiling with AVX instructions enabled.
2016-09-02 19:25:47 -07:00
Benoit Steiner
c3c8ad8046
Align the first element of the Waiter struct instead of padding it. This reduces its memory footprint a bit while achieving the goal of preventing false sharing
2016-06-02 21:17:41 -07:00
Benoit Steiner
c7c2054bb5
Started to implement a portable way to yield.
2016-04-19 17:59:58 -07:00
Benoit Steiner
78a51abc12
Added a more scalable non blocking thread pool
2016-04-14 15:23:10 -07:00
