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-rw-r--r--qemu/block/accounting.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/qemu/block/accounting.c b/qemu/block/accounting.c
new file mode 100644
index 000000000..01d594ffd
--- /dev/null
+++ b/qemu/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;
+}