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Minimize false sharing of MPMC queue variables

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Robin Gareus 2021-06-07 23:38:53 +02:00
parent 5cec55da2e
commit bed992d55f
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1 changed files with 4 additions and 6 deletions
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10
libs/pbd/pbd/mpmc_queue.h
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@ -199,16 +199,14 @@ private:
T _data; T _data;
}; };
typedef char cacheline_pad_t[64]; char _pad0[64];
cacheline_pad_t _pad0;
cell_t* _buffer; cell_t* _buffer;
size_t _buffer_mask; size_t _buffer_mask;
cacheline_pad_t _pad1; char _pad1[64 - sizeof (cell_t*) - sizeof (size_t)];
MPMC_QUEUE_TYPE _enqueue_pos; MPMC_QUEUE_TYPE _enqueue_pos;
cacheline_pad_t _pad2; char _pad2[64 - sizeof (size_t)];
MPMC_QUEUE_TYPE _dequeue_pos; MPMC_QUEUE_TYPE _dequeue_pos;
cacheline_pad_t _pad3; char _pad3[64 - sizeof (size_t)];
}; };
} // namespace PBD } // namespace PBD