ceph/0022-common-mempool-Modify-shard-selection-function.patch
liqiang 61405743cb fix performance issue of pick_a_shard
Signed-off-by: liqiang <liqiang64@huawei.com>
2021-12-29 11:33:17 +08:00

29 lines
909 B
Diff

From fccbdc0905e3868666fbb10803bac6b73f687cb1 Mon Sep 17 00:00:00 2001
From: Adam Kupczyk <akupczyk@redhat.com>
Date: Mon, 25 Jan 2021 11:45:06 +0100
Subject: [PATCH] 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>
---
src/include/mempool.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/include/mempool.h b/src/include/mempool.h
index a18f6a502da..c03aa175cfa 100644
--- 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;
}
--
2.23.0.windows.1