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| author |   Jonathan Neuschäfer <j.neuschaefer@gmx.net> | 2018-07-01 05:28:37 +0200 |
|---|---|---|
| committer | Jonathan Neuschäfer <j.neuschaefer@gmx.net> | 2018-07-01 05:33:38 +0200 |
| commit | ff499c39a2568ae9437258fd2e1e61f5ce138190 (patch) | |
| tree | cdcd47ab43cbab73dea49d9c8c7312bd57d1906d /src/mpmc_ptr_ring.h | |
| parent | mpmc_ptr_ring: use atomic_t instead of atomic_long_t (diff) | |
| download | wireguard-monolithic-historical-ff499c39a2568ae9437258fd2e1e61f5ce138190.tar.xz wireguard-monolithic-historical-ff499c39a2568ae9437258fd2e1e61f5ce138190.zip | |
mpmc_ptr_ring: place producer_head and producer_tail in the same cacheline
They are updated together, so it doesn't make much sense to keep them
separate in the cache.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Diffstat (limited to 'src/mpmc_ptr_ring.h')
| -rw-r--r-- | src/mpmc_ptr_ring.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/mpmc_ptr_ring.h b/src/mpmc_ptr_ring.h index 4533e03..8c9c28c 100644 --- a/src/mpmc_ptr_ring.h +++ b/src/mpmc_ptr_ring.h @@ -39,14 +39,12 @@ struct mpmc_ptr_ring { void **queue; size_t size; - /* consumer_head: updated in dequeue; read in enqueue */ + /* consumer_head: updated in _consume; read in _produce */ atomic_t consumer_head ____cacheline_aligned_in_smp; - /* producer_head: read and updated in enqueue */ + /* producer_{head,tail}: updated in _produce */ atomic_t producer_head ____cacheline_aligned_in_smp; - - /* producer_tail: updated in enqueue, read in dequeue */ - atomic_t producer_tail ____cacheline_aligned_in_smp; + atomic_t producer_tail; }; static inline bool mpmc_ptr_ring_empty(struct mpmc_ptr_ring *r) |