@@ -4508,6 +4508,8 @@ static int multiwrite_merge(BlockDriverState *bs, BlockRequest *reqs,
}
}
+ block_acct_merge_done(&bs->stats, BLOCK_ACCT_WRITE, num_reqs - outidx - 1);
+
return outidx + 1;
}
@@ -52,3 +52,10 @@ void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
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;
+}
@@ -316,6 +316,8 @@ static BlockStats *bdrv_query_stats(const BlockDriverState *bs)
s->stats->wr_bytes = bs->stats.nr_bytes[BLOCK_ACCT_WRITE];
s->stats->rd_operations = bs->stats.nr_ops[BLOCK_ACCT_READ];
s->stats->wr_operations = bs->stats.nr_ops[BLOCK_ACCT_WRITE];
+ s->stats->rd_merged = bs->stats.merged[BLOCK_ACCT_READ];
+ s->stats->wr_merged = bs->stats.merged[BLOCK_ACCT_WRITE];
s->stats->wr_highest_offset =
bs->stats.wr_highest_sector * BDRV_SECTOR_SIZE;
s->stats->flush_operations = bs->stats.nr_ops[BLOCK_ACCT_FLUSH];
@@ -419,6 +419,8 @@ void hmp_info_blockstats(Monitor *mon, const QDict *qdict)
" wr_total_time_ns=%" PRId64
" rd_total_time_ns=%" PRId64
" flush_total_time_ns=%" PRId64
+ " rd_merged=%" PRId64
+ " wr_merged=%" PRId64
"\n",
stats->value->stats->rd_bytes,
stats->value->stats->wr_bytes,
@@ -427,7 +429,9 @@ void hmp_info_blockstats(Monitor *mon, const QDict *qdict)
stats->value->stats->flush_operations,
stats->value->stats->wr_total_time_ns,
stats->value->stats->rd_total_time_ns,
- stats->value->stats->flush_total_time_ns);
+ stats->value->stats->flush_total_time_ns,
+ stats->value->stats->rd_merged,
+ stats->value->stats->wr_merged);
}
qapi_free_BlockStatsList(stats_list);
@@ -39,6 +39,7 @@ typedef struct BlockAcctStats {
uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
uint64_t nr_ops[BLOCK_MAX_IOTYPE];
uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
+ uint64_t merged[BLOCK_MAX_IOTYPE];
uint64_t wr_highest_sector;
} BlockAcctStats;
@@ -53,5 +54,7 @@ void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie);
void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
unsigned int nb_sectors);
+void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
+ int num_requests);
#endif
@@ -389,13 +389,21 @@
# growable sparse files (like qcow2) that are used on top
# of a physical device.
#
+# @rd_merged: Number of read requests that have been merged into another request
+# (Since 2.3).
+#
+# @wr_merged: Number of write requests that have been merged into another request
+# (Since 2.3).
+#
+#
# Since: 0.14.0
##
{ 'type': 'BlockDeviceStats',
'data': {'rd_bytes': 'int', 'wr_bytes': 'int', 'rd_operations': 'int',
'wr_operations': 'int', 'flush_operations': 'int',
'flush_total_time_ns': 'int', 'wr_total_time_ns': 'int',
- 'rd_total_time_ns': 'int', 'wr_highest_offset': 'int' } }
+ 'rd_total_time_ns': 'int', 'wr_highest_offset': 'int',
+ 'rd_merged': 'int', 'wr_merged': 'int' } }
##
# @BlockStats:
Signed-off-by: Peter Lieven <pl@kamp.de> --- block.c | 2 ++ block/accounting.c | 7 +++++++ block/qapi.c | 2 ++ hmp.c | 6 +++++- include/block/accounting.h | 3 +++ qapi/block-core.json | 10 +++++++++- 6 files changed, 28 insertions(+), 2 deletions(-)