1 /* 2 * QEMU System Emulator block accounting 3 * 4 * Copyright (c) 2011 Christoph Hellwig 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "block/accounting.h" 26 #include "block/block_int.h" 27 28 void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie, 29 int64_t bytes, enum BlockAcctType type) 30 { 31 assert(type < BLOCK_MAX_IOTYPE); 32 33 cookie->bytes = bytes; 34 cookie->start_time_ns = get_clock(); 35 cookie->type = type; 36 } 37 38 void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie) 39 { 40 assert(cookie->type < BLOCK_MAX_IOTYPE); 41 42 stats->nr_bytes[cookie->type] += cookie->bytes; 43 stats->nr_ops[cookie->type]++; 44 stats->total_time_ns[cookie->type] += get_clock() - cookie->start_time_ns; 45 } 46 47 48 void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num, 49 unsigned int nb_sectors) 50 { 51 if (stats->wr_highest_sector < sector_num + nb_sectors - 1) { 52 stats->wr_highest_sector = sector_num + nb_sectors - 1; 53 } 54 } 55