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, 5 insertions, 8 deletions

diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 669a601b35..9f5747205d 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -616,13 +616,10 @@ extern char *erts_sys_ddll_error(int code);
  * System interfaces for startup.
  */
 
-
-#ifdef ERTS_SMP
 void erts_sys_schedule_interrupt(int set);
+#ifdef ERTS_SMP
 void erts_sys_schedule_interrupt_timed(int set, long msec);
 void erts_sys_main_thread(void);
-#else
-#define erts_sys_schedule_interrupt(Set)
 #endif
 
 extern void erts_sys_prepare_crash_dump(void);
@@ -697,10 +694,10 @@ int erts_write_env(char *key, char *value);
 int sys_alloc_opt(int, int);
 
 typedef struct {
-  Sint trim_threshold;
-  Sint top_pad;
-  Sint mmap_threshold;
-  Sint mmap_max;
+  int trim_threshold;
+  int top_pad;
+  int mmap_threshold;
+  int mmap_max;
 } SysAllocStat;
 
 void sys_alloc_stat(SysAllocStat *);