1/* 2 * CDDL HEADER START 3 * 4 * This file and its contents are supplied under the terms of the 5 * Common Development and Distribution License ("CDDL"), version 1.0. 6 * You may only use this file in accordance with the terms of version 7 * 1.0 of the CDDL. 8 * 9 * A full copy of the text of the CDDL should have accompanied this 10 * source. A copy of the CDDL is also available via the Internet at 11 * http://www.illumos.org/license/CDDL. 12 * 13 * CDDL HEADER END 14 */ 15/* 16 * Copyright (c) 2017 by Delphix. All rights reserved. 17 */ 18 19#ifndef _SYS_AGGSUM_H 20#define _SYS_AGGSUM_H 21 22#include <sys/zfs_context.h> 23 24#ifdef __cplusplus 25extern "C" { 26#endif 27 28typedef struct aggsum_bucket aggsum_bucket_t; 29 30struct aggsum_bucket { 31 kmutex_t asc_lock; 32 int64_t asc_delta; 33 uint64_t asc_borrowed; 34} ____cacheline_aligned; 35 36/* 37 * Fan out over FANOUT cpus. 38 */ 39typedef struct aggsum { 40 kmutex_t as_lock; 41 int64_t as_lower_bound; 42 uint64_t as_upper_bound; 43 aggsum_bucket_t *as_buckets ____cacheline_aligned; 44 uint_t as_numbuckets; 45 uint_t as_bucketshift; 46} aggsum_t; 47 48void aggsum_init(aggsum_t *, uint64_t); 49void aggsum_fini(aggsum_t *); 50int64_t aggsum_lower_bound(aggsum_t *); 51uint64_t aggsum_upper_bound(aggsum_t *); 52int aggsum_compare(aggsum_t *, uint64_t); 53uint64_t aggsum_value(aggsum_t *); 54void aggsum_add(aggsum_t *, int64_t); 55 56#ifdef __cplusplus 57} 58#endif 59 60#endif /* _SYS_AGGSUM_H */ 61