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block: New option to define the intervals for collecting I/O statistics

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The BlockAcctStats structure contains a list of BlockAcctTimedStats.
Each one of these collects statistics about the minimum, maximum and
average latencies of all I/O operations in a certain interval of time.

This patch adds a new "stats-intervals" option that allows defining
these intervals.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: 41cbcd334a61c6157f0f495cdfd21eff6c156f2a.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 17:33:07 +02:00 • committed by Kevin Wolf
parent 96e4dedaff
commit 2be5506fc8
2 changed files with 41 additions and 0 deletions
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4
qapi/block-core.json
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@ -1531,6 +1531,9 @@
# @stats-account-failed: #optional whether to include failed
# operations when computing latency and last
# access statistics (default: true) (Since 2.5)
# @stats-intervals: #optional colon-separated list of intervals for
# collecting I/O statistics, in seconds (default: none)
# (Since 2.5)
# @detect-zeroes: #optional detect and optimize zero writes (Since 2.1)
# (default: off)
#
@ -1548,6 +1551,7 @@
'*read-only': 'bool',
'*stats-account-invalid': 'bool',
'*stats-account-failed': 'bool',
'*stats-intervals': 'str',
'*detect-zeroes': 'BlockdevDetectZeroesOptions' } }
##