File 3523-erts-Decrease-super-alignment-on-64-bit.patch of Package erlang

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File 3523-erts-Decrease-super-alignment-on-64-bit.patch of Package erlang (Revision 88a02c2ce6d63718530f078daeb49b67)

Currently displaying revision 88a02c2ce6d63718530f078daeb49b67 , Show latest

From 96860fdcdb48bb0eb53e79758be072a2eb265a2e Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Mon, 19 Apr 2021 18:20:44 +0200
Subject: [PATCH 3/3] erts: Decrease super alignment on 64-bit

From 256kb to 16kb.
---
 erts/emulator/beam/erl_alloc_util.h | 2 +-
 erts/emulator/sys/common/erl_mmap.h | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/erts/emulator/beam/erl_alloc_util.h b/erts/emulator/beam/erl_alloc_util.h
index 359457913c..45e5bfc211 100644
--- a/erts/emulator/beam/erl_alloc_util.h
+++ b/erts/emulator/beam/erl_alloc_util.h
@@ -298,7 +298,7 @@ void erts_alcu_sched_spec_data_init(struct ErtsSchedulerData_ *esdp);
 #  ifdef MSEG_ALIGN_BITS
 #    define ERTS_SUPER_ALIGN_BITS MSEG_ALIGN_BITS
 #  else
-#    define ERTS_SUPER_ALIGN_BITS 18
+#    define ERTS_SUPER_ALIGN_BITS ERTS_MMAP_SUPERALIGNED_BITS
 #  endif
 #  ifdef ARCH_64 
 #    define MBC_ABLK_OFFSET_BITS   24
diff --git a/erts/emulator/sys/common/erl_mmap.h b/erts/emulator/sys/common/erl_mmap.h
index d45bea7b6f..a34763a754 100644
--- a/erts/emulator/sys/common/erl_mmap.h
+++ b/erts/emulator/sys/common/erl_mmap.h
@@ -24,8 +24,12 @@
 #include "sys.h"
 #include "erl_printf.h"
 
-#define ERTS_MMAP_SUPERALIGNED_BITS (18)
+#if defined(ARCH_64)
+#  define ERTS_MMAP_SUPERALIGNED_BITS (14)
+#else
+#  define ERTS_MMAP_SUPERALIGNED_BITS (18)
 /* Affects hard limits for sbct and lmbcs documented in erts_alloc.xml */
+#endif
 
 #ifndef HAVE_MMAP
 #  define HAVE_MMAP 0
-- 
2.26.2

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File 3523-erts-Decrease-super-alignment-on-64-bit.patch of Package erlang (Revision 88a02c2ce6d63718530f078daeb49b67)

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