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block: Allow configuring whether to account failed and invalid ops

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This patch adds two options, "stats-account-invalid" and
"stats-account-failed", that can be used to decide whether invalid and
failed I/O operations must be used when collecting statistics for
latency and last access time.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: ebc7e5966511a342cad428a392c5f5ad56b15213.1446044837.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Alberto Garcia 2015-10-28 17:33:04 +02:00 • committed by Kevin Wolf
parent 7ee12dafe9
commit 362e9299b3
6 changed files with 79 additions and 11 deletions
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17
qapi/block-core.json
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@ -470,6 +470,12 @@
# @invalid_flush_operations: The number of invalid flush operations
# performed by the device (Since 2.5)
#
# @account_invalid: Whether invalid operations are included in the
# last access statistics (Since 2.5)
#
# @account_failed: Whether failed operations are included in the
# latency and last access statistics (Since 2.5)
#
# Since: 0.14.0
##
{ 'struct': 'BlockDeviceStats',
@ -480,7 +486,8 @@
'rd_merged': 'int', 'wr_merged': 'int', '*idle_time_ns': 'int',
'failed_rd_operations': 'int', 'failed_wr_operations': 'int',
'failed_flush_operations': 'int', 'invalid_rd_operations': 'int',
'invalid_wr_operations': 'int', 'invalid_flush_operations': 'int' } }
'invalid_wr_operations': 'int', 'invalid_flush_operations': 'int',
'account_invalid': 'bool', 'account_failed': 'bool' } }
##
# @BlockStats:
@ -1461,6 +1468,12 @@
# (default: enospc)
# @read-only: #optional whether the block device should be read-only
# (default: false)
# @stats-account-invalid: #optional whether to include invalid
# operations when computing last access statistics
# (default: true) (Since 2.5)
# @stats-account-failed: #optional whether to include failed
# operations when computing latency and last
# access statistics (default: true) (Since 2.5)
# @detect-zeroes: #optional detect and optimize zero writes (Since 2.1)
# (default: off)
#
@ -1476,6 +1489,8 @@
'*rerror': 'BlockdevOnError',
'*werror': 'BlockdevOnError',
'*read-only': 'bool',
'*stats-account-invalid': 'bool',
'*stats-account-failed': 'bool',
'*detect-zeroes': 'BlockdevDetectZeroesOptions' } }
##