aggsum.h

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    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 } ____cacheline_aligned;
   35 
   36 /*
   37  * Fan out over FANOUT cpus.
   38  */
   39 typedef 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 
   48 void aggsum_init(aggsum_t *, uint64_t);
   49 void aggsum_fini(aggsum_t *);
   50 int64_t aggsum_lower_bound(aggsum_t *);
   51 uint64_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 */

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/include/sys/aggsum.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/aggsum.h