From 1e4537de49cd433e1b32974f0869076fe51271fb Mon Sep 17 00:00:00 2001
From: Florian Schmaus <flow@cs.fau.de>
Date: Thu, 27 Apr 2017 17:09:10 +0200
Subject: [PATCH] Align Context to cache line
---
emper/Context.hpp | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/emper/Context.hpp b/emper/Context.hpp
index 210b1ec3..99485fe6 100644
--- a/emper/Context.hpp
+++ b/emper/Context.hpp
@@ -18,14 +18,14 @@ extern "C" [[noreturn]] void switch_and_load_context(void** toTos);
extern "C" void save_and_switch_context(void** toTos, void** fromTos);
extern "C" [[noreturn]] void switch_context(void** toTos);
-class Context : Logger<LogSubsystem::C> {
+class ALIGN_TO_CACHE_LINE Context : Logger<LogSubsystem::C> {
private:
static const unsigned int CONTEXT_SIZE = 0xffff; // 1024 * 1024 * 4;
static thread_local Context* currentContext;
- char context[CONTEXT_SIZE];
void* const tos;
+
// unsigned valgrindStackId;
void* savedStackpointer;
@@ -35,6 +35,10 @@ private:
func_t preMainHook;
+ // Allign the stack to a cache line, so that it isn't shared with
+ // the other members of this class.
+ ALIGN_TO_CACHE_LINE char context[CONTEXT_SIZE];
+
friend std::ostream& operator<<(std::ostream&, const Context&);
/**
--
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