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block: Add average I/O queue depth to BlockDeviceTimedStats

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This patch adds two new fields to BlockDeviceTimedStats that track the
average number of pending read and write requests for a block device.

The values are calculated for the period of time defined for that
interval.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: fd31fef53e2714f2f30d59ed58ca2f67ec9ab926.1446044837.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 17:33:06 +02:00 • committed by Kevin Wolf
parent 979e9b03fc
commit 96e4dedaff
7 changed files with 60 additions and 6 deletions
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include/qemu/timed-average.h
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@ -59,5 +59,6 @@ void timed_average_account(TimedAverage *ta, uint64_t value);
uint64_t timed_average_min(TimedAverage *ta);
uint64_t timed_average_avg(TimedAverage *ta);
uint64_t timed_average_max(TimedAverage *ta);
uint64_t timed_average_sum(TimedAverage *ta, uint64_t *elapsed);
#endif