diff options
| author | Alberto Garcia <berto@igalia.com> | 2015-10-28 17:33:05 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-11-12 16:22:45 +0100 |
| commit | 979e9b03fc8c85d3b78a14410c64cbb16d348095 (patch) | |
| tree | acadf4f7a6bf98a4ce5363ea40a5658542949640 /qapi | |
| parent | 362e9299b34b3101aaa20f20363441c9f055fa5e (diff) | |
block: Compute minimum, maximum and average I/O latencies
This patch keeps track of the minimum, maximum and average latencies
of I/O operations during a certain interval of time.
The values are exposed in the BlockDeviceTimedStats structure.
An option to define the intervals to collect these statistics will be
added in a separate patch.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: c7382dc89622c64f918d09f32815827772628f8e.1446044837.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/block-core.json | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index 0d517ab8e5..80470da574 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -414,6 +414,52 @@ ## { 'command': 'query-block', 'returns': ['BlockInfo'] } + +## +# @BlockDeviceTimedStats: +# +# Statistics of a block device during a given interval of time. +# +# @interval_length: Interval used for calculating the statistics, +# in seconds. +# +# @min_rd_latency_ns: Minimum latency of read operations in the +# defined interval, in nanoseconds. +# +# @min_wr_latency_ns: Minimum latency of write operations in the +# defined interval, in nanoseconds. +# +# @min_flush_latency_ns: Minimum latency of flush operations in the +# defined interval, in nanoseconds. +# +# @max_rd_latency_ns: Maximum latency of read operations in the +# defined interval, in nanoseconds. +# +# @max_wr_latency_ns: Maximum latency of write operations in the +# defined interval, in nanoseconds. +# +# @max_flush_latency_ns: Maximum latency of flush operations in the +# defined interval, in nanoseconds. +# +# @avg_rd_latency_ns: Average latency of read operations in the +# defined interval, in nanoseconds. +# +# @avg_wr_latency_ns: Average latency of write operations in the +# defined interval, in nanoseconds. +# +# @avg_flush_latency_ns: Average latency of flush operations in the +# defined interval, in nanoseconds. +# +# Since: 2.5 +## + +{ 'struct': 'BlockDeviceTimedStats', + 'data': { 'interval_length': 'int', 'min_rd_latency_ns': 'int', + 'max_rd_latency_ns': 'int', 'avg_rd_latency_ns': 'int', + 'min_wr_latency_ns': 'int', 'max_wr_latency_ns': 'int', + 'avg_wr_latency_ns': 'int', 'min_flush_latency_ns': 'int', + 'max_flush_latency_ns': 'int', 'avg_flush_latency_ns': 'int' } } + ## # @BlockDeviceStats: # @@ -476,6 +522,9 @@ # @account_failed: Whether failed operations are included in the # latency and last access statistics (Since 2.5) # +# @timed_stats: Statistics specific to the set of previously defined +# intervals of time (Since 2.5) +# # Since: 0.14.0 ## { 'struct': 'BlockDeviceStats', @@ -487,7 +536,8 @@ 'failed_rd_operations': 'int', 'failed_wr_operations': 'int', 'failed_flush_operations': 'int', 'invalid_rd_operations': 'int', 'invalid_wr_operations': 'int', 'invalid_flush_operations': 'int', - 'account_invalid': 'bool', 'account_failed': 'bool' } } + 'account_invalid': 'bool', 'account_failed': 'bool', + 'timed_stats': ['BlockDeviceTimedStats'] } } ## # @BlockStats: |