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author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
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committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
tree | 65ca85f13617aee1dce474596800950f266a456c /block/accounting.c | |
download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip |
Diffstat (limited to 'block/accounting.c')
-rw-r--r-- | block/accounting.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/block/accounting.c b/block/accounting.c new file mode 100644 index 00000000..01d594ff --- /dev/null +++ b/block/accounting.c @@ -0,0 +1,63 @@ +/* + * 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" +#include "qemu/timer.h" + +void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie, + int64_t bytes, enum BlockAcctType type) +{ + assert(type < BLOCK_MAX_IOTYPE); + + cookie->bytes = bytes; + cookie->start_time_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); + cookie->type = type; +} + +void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie) +{ + assert(cookie->type < BLOCK_MAX_IOTYPE); + + stats->nr_bytes[cookie->type] += cookie->bytes; + stats->nr_ops[cookie->type]++; + stats->total_time_ns[cookie->type] += + qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - cookie->start_time_ns; +} + + +void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num, + unsigned int nb_sectors) +{ + if (stats->wr_highest_sector < sector_num + nb_sectors - 1) { + stats->wr_highest_sector = sector_num + nb_sectors - 1; + } +} + +void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type, + int num_requests) +{ + assert(type < BLOCK_MAX_IOTYPE); + stats->merged[type] += num_requests; +} |