mirror/eigen
2
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2024-12-21 07:19:46 +08:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source
This commit is contained in:
Benoit Steiner 2016-06-02 21:17:41 -07:00
parent 5b77481d58
commit c3c8ad8046
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
unsupported/Eigen/CXX11/src/ThreadPool/EventCount.h
View File

@ -169,7 +169,8 @@ class EventCount {
class Waiter {
friend class EventCount;
std::atomic<Waiter*> next;
// Align to 128 byte boundary to prevent false sharing with other Waiter objects in the same vector.
EIGEN_ALIGN_TO_BOUNDARY(128) std::atomic<Waiter*> next;
std::mutex mu;
std::condition_variable cv;
uint64_t epoch;
@ -179,8 +180,6 @@ class EventCount {
kWaiting,
kSignaled,
};
// Prevent false sharing with other Waiter objects in the same vector.
char pad_[128];
};
private: