qemu-e2k/block/accounting.c

/*
 * QEMU System Emulator block accounting
 *
 * Copyright (c) 2011 Christoph Hellwig
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "block/accounting.h"
#include "block/block_int.h"

void
bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, int64_t bytes,
        enum BlockAcctType type)
{
    assert(type < BLOCK_MAX_IOTYPE);

    cookie->bytes = bytes;
    cookie->start_time_ns = get_clock();
    cookie->type = type;
}

void
bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie)
{
    assert(cookie->type < BLOCK_MAX_IOTYPE);

    bs->stats.nr_bytes[cookie->type] += cookie->bytes;
    bs->stats.nr_ops[cookie->type]++;
    bs->stats.total_time_ns[cookie->type] += get_clock() -
                                             cookie->start_time_ns;
}


void bdrv_acct_highest_sector(BlockDriverState *bs, int64_t sector_num,
                              unsigned int nb_sectors)
{
    if (bs->stats.wr_highest_sector < sector_num + nb_sectors - 1) {
        bs->stats.wr_highest_sector = sector_num + nb_sectors - 1;
    }
}