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 25 extern "C" { 26 #endif 27 28 typedef struct aggsum_bucket aggsum_bucket_t; 29 30 struct aggsum_bucket { 31 kmutex_t asc_lock; 32 int64_t asc_delta; 33 uint64_t asc_borrowed; 34 uint64_t asc_pad[4]; /* pad out to cache line (64 bytes) */ 35 } __cacheline_aligned; 36 37 /* 38 * Fan out over FANOUT cpus. 39 */ 40 typedef struct aggsum { 41 kmutex_t as_lock; 42 int64_t as_lower_bound; 43 int64_t as_upper_bound; 44 uint64_t as_numbuckets; 45 aggsum_bucket_t *as_buckets __cacheline_aligned; 46 } aggsum_t; 47 48 void aggsum_init(aggsum_t *, uint64_t); 49 void aggsum_fini(aggsum_t *); 50 int64_t aggsum_lower_bound(aggsum_t *); 51 int64_t aggsum_upper_bound(aggsum_t *); 52 int aggsum_compare(aggsum_t *, uint64_t); 53 uint64_t aggsum_value(aggsum_t *); 54 void aggsum_add(aggsum_t *, int64_t); 55 56 #ifdef __cplusplus 57 } 58 #endif 59 60 #endif /* _SYS_AGGSUM_H */ 61