1 /* 2 * Copyright (c) 2020 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifndef _MISCFS_SPECFS_IO_COMPRESSION_STATS_H_ 30 #define _MISCFS_SPECFS_IO_COMPRESSION_STATS_H_ 31 32 #include <sys/buf_internal.h> 33 #include <sys/vnode.h> 34 35 void io_compression_stats_init(void); 36 void io_compression_stats(buf_t bp); 37 38 #define IO_COMPRESSION_STATS_DEFAULT_BLOCK_SIZE (4 * 1024) 39 #define IO_COMPRESSION_STATS_MIN_BLOCK_SIZE (4 * 1024) 40 #define IO_COMPRESSION_STATS_MAX_BLOCK_SIZE (1024 * 1024 * 1024) 41 42 #if IO_COMPRESSION_STATS_DEBUG 43 #define io_compression_stats_dbg(fmt, ...) \ 44 printf("%s: " fmt "\n", __func__, ## __VA_ARGS__) 45 #else 46 #define io_compression_stats_dbg(fmt, ...) 47 #endif 48 49 /* iocs_store_buffer: Buffer that captures the stats of vnode being reclaimed */ 50 struct iocs_store_buffer { 51 void* buffer; 52 uint32_t current_position; 53 uint32_t marked_point; 54 }; 55 56 #define IOCS_STORE_BUFFER_NUM_SLOTS 10000 57 #define IOCS_STORE_BUFFER_SIZE (IOCS_STORE_BUFFER_NUM_SLOTS * (sizeof(struct iocs_store_buffer_entry))) 58 59 /* Notify user when the buffer is 80% full */ 60 #define IOCS_STORE_BUFFER_NOTIFY_AT ((IOCS_STORE_BUFFER_SIZE * 8) / 10) 61 62 /* Wait for the buffer to be 10% more full before notifying again */ 63 #define IOCS_STORE_BUFFER_NOTIFICATION_INTERVAL (IOCS_STORE_BUFFER_SIZE / 10) 64 65 #endif 66