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authorMarkus Armbruster <armbru@redhat.com>2015-10-15 17:08:36 +0200
committerMarkus Armbruster <armbru@redhat.com>2015-10-30 09:05:38 +0100
commit7f1e7b23d57408c86d350b3544673fdcd6be55c0 (patch)
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parent7de0be6573afc9dcfb6aa0ded167ad6a8730f727 (diff)
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docs: Document QMP event rate limiting
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1444921716-9511-8-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'docs')
-rw-r--r--docs/qmp-events.txt12
-rw-r--r--docs/qmp-spec.txt5
2 files changed, 17 insertions, 0 deletions
diff --git a/docs/qmp-events.txt b/docs/qmp-events.txt
index d92cc48..d2f1ce4 100644
--- a/docs/qmp-events.txt
+++ b/docs/qmp-events.txt
@@ -28,6 +28,8 @@ Example:
"data": { "actual": 944766976 },
"timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
+Note: this event is rate-limited.
+
BLOCK_IMAGE_CORRUPTED
---------------------
@@ -296,6 +298,8 @@ Example:
"data": { "reference": "usr1", "sector-num": 345435, "sectors-count": 5 },
"timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
+Note: this event is rate-limited.
+
QUORUM_REPORT_BAD
-----------------
@@ -318,6 +322,8 @@ Example:
"data": { "node-name": "1.raw", "sector-num": 345435, "sectors-count": 5 },
"timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
+Note: this event is rate-limited.
+
RESET
-----
@@ -358,6 +364,8 @@ Example:
"data": { "offset": 78 },
"timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
+Note: this event is rate-limited.
+
SHUTDOWN
--------
@@ -632,6 +640,8 @@ Example:
"data": { "id": "channel0", "open": true },
"timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
+Note: this event is rate-limited separately for each "id".
+
WAKEUP
------
@@ -662,3 +672,5 @@ Example:
Note: If action is "reset", "shutdown", or "pause" the WATCHDOG event is
followed respectively by the RESET, SHUTDOWN, or STOP events.
+
+Note: this event is rate-limited.
diff --git a/docs/qmp-spec.txt b/docs/qmp-spec.txt
index 4c28cd9..4fb10a5 100644
--- a/docs/qmp-spec.txt
+++ b/docs/qmp-spec.txt
@@ -175,6 +175,11 @@ The format of asynchronous events is:
For a listing of supported asynchronous events, please, refer to the
qmp-events.txt file.
+Some events are rate-limited to at most one per second. If additional
+"similar" events arrive within one second, all but the last one are
+dropped, and the last one is delayed. "Similar" normally means same
+event type. See qmp-events.txt for details.
+
2.5 QGA Synchronization
-----------------------