+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2013, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * libcfs/include/libcfs/libcfs_cpu.h
- *
- * CPU partition
- * . CPU partition is virtual processing unit
- *
- * . CPU partition can present 1-N cores, or 1-N NUMA nodes,
- * in other words, CPU partition is a processors pool.
- *
- * CPU Partition Table (CPT)
- * . a set of CPU partitions
- *
- * . There are two modes for CPT: CFS_CPU_MODE_NUMA and CFS_CPU_MODE_SMP
- *
- * . User can specify total number of CPU partitions while creating a
- * CPT, ID of CPU partition is always start from 0.
- *
- * Example: if there are 8 cores on the system, while creating a CPT
- * with cpu_npartitions=4:
- * core[0, 1] = partition[0], core[2, 3] = partition[1]
- * core[4, 5] = partition[2], core[6, 7] = partition[3]
- *
- * cpu_npartitions=1:
- * core[0, 1, ... 7] = partition[0]
- *
- * . User can also specify CPU partitions by string pattern
- *
- * Examples: cpu_partitions="0[0,1], 1[2,3]"
- * cpu_partitions="N 0[0-3], 1[4-8]"
- *
- * The first character "N" means following numbers are numa ID
- *
- * . NUMA allocators, CPU affinity threads are built over CPU partitions,
- * instead of HW CPUs or HW nodes.
- *
- * . By default, Lustre modules should refer to the global cfs_cpt_table,
- * instead of accessing HW CPUs directly, so concurrency of Lustre can be
- * configured by cpu_npartitions of the global cfs_cpt_table
- *
- * . If cpu_npartitions=1(all CPUs in one pool), lustre should work the
- * same way as 2.2 or earlier versions
- *
- * Author: liang@whamcloud.com
- */
-
-#ifndef __LIBCFS_CPU_H__
-#define __LIBCFS_CPU_H__
-
-#ifndef HAVE_LIBCFS_CPT
-
-typedef unsigned long cpumask_t;
-typedef unsigned long nodemask_t;
-
-struct cfs_cpt_table {
- /* # of CPU partitions */
- int ctb_nparts;
- /* cpu mask */
- cpumask_t ctb_mask;
- /* node mask */
- nodemask_t ctb_nodemask;
- /* version */
- __u64 ctb_version;
-};
-
-#endif /* !HAVE_LIBCFS_CPT */
-
-/* any CPU partition */
-#define CFS_CPT_ANY (-1)
-
-extern struct cfs_cpt_table *cfs_cpt_table;
-
-/**
- * destroy a CPU partition table
- */
-void cfs_cpt_table_free(struct cfs_cpt_table *cptab);
-/**
- * create a cfs_cpt_table with \a ncpt number of partitions
- */
-struct cfs_cpt_table *cfs_cpt_table_alloc(unsigned int ncpt);
-/**
- * print string information of cpt-table
- */
-int cfs_cpt_table_print(struct cfs_cpt_table *cptab, char *buf, int len);
-/**
- * return total number of CPU partitions in \a cptab
- */
-int
-cfs_cpt_number(struct cfs_cpt_table *cptab);
-/**
- * return number of HW cores or hypter-threadings in a CPU partition \a cpt
- */
-int cfs_cpt_weight(struct cfs_cpt_table *cptab, int cpt);
-/**
- * is there any online CPU in CPU partition \a cpt
- */
-int cfs_cpt_online(struct cfs_cpt_table *cptab, int cpt);
-/**
- * return cpumask of CPU partition \a cpt
- */
-cpumask_t *cfs_cpt_cpumask(struct cfs_cpt_table *cptab, int cpt);
-/**
- * return nodemask of CPU partition \a cpt
- */
-nodemask_t *cfs_cpt_nodemask(struct cfs_cpt_table *cptab, int cpt);
-/**
- * shadow current HW processor ID to CPU-partition ID of \a cptab
- */
-int cfs_cpt_current(struct cfs_cpt_table *cptab, int remap);
-/**
- * shadow HW processor ID \a CPU to CPU-partition ID by \a cptab
- */
-int cfs_cpt_of_cpu(struct cfs_cpt_table *cptab, int cpu);
-/**
- * bind current thread on a CPU-partition \a cpt of \a cptab
- */
-int cfs_cpt_bind(struct cfs_cpt_table *cptab, int cpt);
-/**
- * add \a cpu to CPU partion @cpt of \a cptab, return 1 for success,
- * otherwise 0 is returned
- */
-int cfs_cpt_set_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu);
-/**
- * remove \a cpu from CPU partition \a cpt of \a cptab
- */
-void cfs_cpt_unset_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu);
-/**
- * add all cpus in \a mask to CPU partition \a cpt
- * return 1 if successfully set all CPUs, otherwise return 0
- */
-int cfs_cpt_set_cpumask(struct cfs_cpt_table *cptab,
- int cpt, cpumask_t *mask);
-/**
- * remove all cpus in \a mask from CPU partition \a cpt
- */
-void cfs_cpt_unset_cpumask(struct cfs_cpt_table *cptab,
- int cpt, cpumask_t *mask);
-/**
- * add all cpus in NUMA node \a node to CPU partition \a cpt
- * return 1 if successfully set all CPUs, otherwise return 0
- */
-int cfs_cpt_set_node(struct cfs_cpt_table *cptab, int cpt, int node);
-/**
- * remove all cpus in NUMA node \a node from CPU partition \a cpt
- */
-void cfs_cpt_unset_node(struct cfs_cpt_table *cptab, int cpt, int node);
-
-/**
- * add all cpus in node mask \a mask to CPU partition \a cpt
- * return 1 if successfully set all CPUs, otherwise return 0
- */
-int cfs_cpt_set_nodemask(struct cfs_cpt_table *cptab,
- int cpt, nodemask_t *mask);
-/**
- * remove all cpus in node mask \a mask from CPU partition \a cpt
- */
-void cfs_cpt_unset_nodemask(struct cfs_cpt_table *cptab,
- int cpt, nodemask_t *mask);
-/**
- * unset all cpus for CPU partition \a cpt
- */
-void cfs_cpt_clear(struct cfs_cpt_table *cptab, int cpt);
-/**
- * convert partition id \a cpt to numa node id, if there are more than one
- * nodes in this partition, it might return a different node id each time.
- */
-int cfs_cpt_spread_node(struct cfs_cpt_table *cptab, int cpt);
-
-/**
- * iterate over all CPU partitions in \a cptab
- */
-#define cfs_cpt_for_each(i, cptab) \
- for (i = 0; i < cfs_cpt_number(cptab); i++)
-
-#ifndef __read_mostly
-# define __read_mostly
-#endif
-
-#ifndef ____cacheline_aligned
-#define ____cacheline_aligned
-#endif
-
-int cfs_cpu_init(void);
-void cfs_cpu_fini(void);
-
-#endif /* __LIBCFS_CPU_H__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff