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-rw-r--r--uts/common/sys/cpupart.h27
1 files changed, 11 insertions, 16 deletions
diff --git a/uts/common/sys/cpupart.h b/uts/common/sys/cpupart.h
index b9e0da4e1993..b44dda5e8418 100644
--- a/uts/common/sys/cpupart.h
+++ b/uts/common/sys/cpupart.h
@@ -19,15 +19,12 @@
* CDDL HEADER END
*/
/*
- * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _SYS_CPUPART_H
#define _SYS_CPUPART_H
-#pragma ident "%Z%%M% %I% %E% SMI"
-
#include <sys/types.h>
#include <sys/processor.h>
#include <sys/cpuvar.h>
@@ -58,16 +55,6 @@ typedef int cpupartid_t;
#define CP_ALL 0 /* return all cpu partitions */
#define CP_NONEMPTY 1 /* return only non-empty ones */
-#if defined(_MACHDEP)
-struct mach_cpupart {
- cpuset_t mc_haltset;
-};
-
-extern struct mach_cpupart cp_default_mach;
-#else
-struct mach_cpupart;
-#endif
-
typedef struct cpupart {
disp_t cp_kp_queue; /* partition-wide kpreempt queue */
cpupartid_t cp_id; /* partition ID */
@@ -103,8 +90,7 @@ typedef struct cpupart {
lgrp_gen_t cp_gen; /* generation number */
lgrp_id_t cp_lgrp_hint; /* last home lgroup chosen */
bitset_t cp_cmt_pgs; /* CMT PGs represented */
-
- struct mach_cpupart *cp_mach; /* mach-specific */
+ bitset_t cp_haltset; /* halted CPUs */
} cpupart_t;
typedef struct cpupart_kstat {
@@ -138,6 +124,15 @@ extern cpupart_t *cp_list_head;
extern uint_t cp_numparts;
extern uint_t cp_numparts_nonempty;
+/*
+ * Each partition contains a bitset that indicates which CPUs are halted and
+ * which ones are running. Given the growing number of CPUs in current and
+ * future platforms, it's important to fanout each CPU within its partition's
+ * haltset to prevent contention due to false sharing. The fanout factor
+ * is platform specific, and declared accordingly.
+ */
+extern uint_t cp_haltset_fanout;
+
extern void cpupart_initialize_default();
extern cpupart_t *cpupart_find(psetid_t);
extern int cpupart_create(psetid_t *);