From: Andrew Stubbs <ams@codesourcery.com>
Date: Fri, 13 Jan 2023 17:38:39 +0000 (+0000)
Subject: libgomp, amdgcn: Switch USM to 128-byte alignment
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9b47ccf32a91d8c851a3e20d1a2f47ed0aaa47e;p=thirdparty%2Fgcc.git

libgomp, amdgcn: Switch USM to 128-byte alignment

This should optimize cache-lines on the AMD GPUs somewhat.

libgomp/ChangeLog:

	* usm-allocator.c (ALIGN): Use 128-byte alignment.
---

diff --git a/libgomp/usm-allocator.c b/libgomp/usm-allocator.c
index c45109169ca3..68c1ebafec28 100644
--- a/libgomp/usm-allocator.c
+++ b/libgomp/usm-allocator.c
@@ -57,7 +57,8 @@ static int usm_lock = 0;
 static struct usm_splay_tree_s usm_allocations = { NULL };
 static struct usm_splay_tree_s usm_free_space = { NULL };
 
-#define ALIGN(VAR) (((VAR) + 7) & ~7)    /* 8-byte granularity.  */
+/* 128-byte granularity means GPU cache-line aligned.  */
+#define ALIGN(VAR) (((VAR) + 127) & ~127)
 
 /* Coalesce contiguous free space into one entry.  This considers the entries
    either side of the root node only, so it should be called each time a new