common/mempool: Modify shard selection function

Modify shard selection function, so no longer all threads use the same shard 0.

Signed-off-by: Adam Kupczyk <akupczyk@redhat.com>
(cherry picked from commit fccbdc0905e3868666fbb10803bac6b73f687cb1)

diff --git a/src/include/mempool.h b/src/include/mempool.h
index a18f6a502daad3f65156beae5b922fae02c980d2..c03aa175cfa07ef4c1acb5206cd8152322d6221d 100644 (file)
--- a/src/include/mempool.h
+++ b/src/include/mempool.h
@@ -259,7 +259,7 @@ public:
     // Dirt cheap, see:
     //   https://fossies.org/dox/glibc-2.32/pthread__self_8c_source.html
     size_t me = (size_t)pthread_self();
-    size_t i = (me >> 3) & ((1 << num_shard_bits) - 1);
+    size_t i = (me >> 12) & ((1 << num_shard_bits) - 1);
     return i;
   }