Optimize memory allocation

A number of memory allocation optimizations have been implemented. Most
optimizations reduce contention caused by synchronization between
threads during allocation and deallocation of memory. Most notably:
* Synchronization of memory management in scheduler specific allocator
  instances has been rewritten to use lock-free synchronization.
* Synchronization of memory management in scheduler specific
  pre-allocators has been rewritten to use lock-free synchronization.
* The 'mseg_alloc' memory segment allocator now use scheduler specific
  instances instead of one instance. Apart from reducing contention
  this also ensures that memory allocators always create memory
  segments on the local NUMA node on a NUMA system.

1 files changed, 8 insertions, 1 deletions

diff --git a/erts/emulator/sys/common/erl_check_io.h b/erts/emulator/sys/common/erl_check_io.h
index 9b45a63913..7cc1658062 100644
--- a/erts/emulator/sys/common/erl_check_io.h
+++ b/erts/emulator/sys/common/erl_check_io.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  * 
- * Copyright Ericsson AB 2006-2009. All Rights Reserved.
+ * Copyright Ericsson AB 2006-2011. All Rights Reserved.
  * 
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -40,6 +40,10 @@ Eterm erts_check_io_info_kp(void *);
 Eterm erts_check_io_info_nkp(void *);
 int erts_check_io_max_files_kp(void);
 int erts_check_io_max_files_nkp(void);
+#ifdef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT
+void erts_check_io_async_sig_interrupt_kp(void);
+void erts_check_io_async_sig_interrupt_nkp(void);
+#endif
 void erts_check_io_interrupt_kp(int);
 void erts_check_io_interrupt_nkp(int);
 void erts_check_io_interrupt_timed_kp(int, long);
@@ -56,6 +60,9 @@ int erts_check_io_debug_nkp(void);
 Uint erts_check_io_size(void);
 Eterm erts_check_io_info(void *);
 int erts_check_io_max_files(void);
+#ifdef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT
+void erts_check_io_async_sig_interrupt(void);
+#endif
 void erts_check_io_interrupt(int);
 void erts_check_io_interrupt_timed(int, long);
 void erts_check_io(int);