memory management talk + patches for femalloc+xtbench
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From: Eric Wong <e@80x24.org>
To: mm@80x24.org
Cc: Eric Wong <e@80x24.org>
Subject: [PATCH] xthr: put queue head and tail on separate cache lines
Date: Wed, 30 Jul 2014 22:25:26 +0000	[thread overview]
Message-ID: <1406759126-14843-1-git-send-email-e@80x24.org> (raw)

This should reduce cache line contention.
---
 xthr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xthr.c b/xthr.c
index 6159e82..604a448 100644
--- a/xthr.c
+++ b/xthr.c
@@ -21,10 +21,10 @@
 #include <err.h>
 #include <stdio.h>
 
+static struct cds_wfcq_head head;
 static size_t iter = 1024;
 static size_t mbytes = sizeof(struct cds_wfcq_node);
-static struct cds_wfcq_head head;
-static struct cds_wfcq_tail tail;
+static struct cds_wfcq_tail tail __attribute__((aligned(CAA_CACHE_LINE_SIZE)));
 
 static void *do_free(void *arg)
 {
-- 
EW


                 reply	other threads:[~2014-07-30 22:25 UTC|newest]

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