/*
* Copyright (c) 2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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*/
#ifndef _MISCFS_SPECFS_IO_COMPRESSION_STATS_H_
#define _MISCFS_SPECFS_IO_COMPRESSION_STATS_H_
#include <sys/buf_internal.h>
#include <sys/vnode.h>
void io_compression_stats_init(void);
void io_compression_stats(buf_t bp);
#define IO_COMPRESSION_STATS_DEFAULT_BLOCK_SIZE (4 * 1024)
#define IO_COMPRESSION_STATS_MIN_BLOCK_SIZE (4 * 1024)
#define IO_COMPRESSION_STATS_MAX_BLOCK_SIZE (1024 * 1024 * 1024)
#if IO_COMPRESSION_STATS_DEBUG
#define io_compression_stats_dbg(fmt, ...) \
printf("%s: " fmt "\n", __func__, ## __VA_ARGS__)
#else
#define io_compression_stats_dbg(fmt, ...)
#endif
/* iocs_store_buffer: Buffer that captures the stats of vnode being reclaimed */
struct iocs_store_buffer {
void* buffer;
uint32_t current_position;
uint32_t marked_point;
};
#define IOCS_STORE_BUFFER_NUM_SLOTS 10000
#define IOCS_STORE_BUFFER_SIZE (IOCS_STORE_BUFFER_NUM_SLOTS * (sizeof(struct iocs_store_buffer_entry)))
/* Notify user when the buffer is 80% full */
#define IOCS_STORE_BUFFER_NOTIFY_AT ((IOCS_STORE_BUFFER_SIZE * 8) / 10)
/* Wait for the buffer to be 10% more full before notifying again */
#define IOCS_STORE_BUFFER_NOTIFICATION_INTERVAL (IOCS_STORE_BUFFER_SIZE / 10)
#endif