diff options
Diffstat (limited to 'uts/common/sys/cpupart.h')
| -rw-r--r-- | uts/common/sys/cpupart.h | 27 |
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 *); |