From 93f8f982fedfc9ee9cf5fc8983c3b25efe828967 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Thu, 15 Oct 2015 17:08:31 +0200 Subject: monitor: Simplify event throttling The event throttling state machine is hard to understand. I'm not sure it's entirely correct. Rewrite it in a more straightforward manner: State 1: No event sent recently (less than evconf->rate ns ago) Invariant: evstate->timer is not pending, evstate->qdict is null On event: send event, arm timer, goto state 2 State 2: Event sent recently, no additional event being delayed Invariant: evstate->timer is pending, evstate->qdict is null On event: store it in evstate->qdict, goto state 3 On timer: goto state 1 State 3: Event sent recently, additional event being delayed Invariant: evstate->timer is pending, evstate->qdict is non-null On event: store it in evstate->qdict, goto state 3 On timer: send evstate->qdict, clear evstate->qdict, arm timer, goto state 2 Signed-off-by: Markus Armbruster Message-Id: <1444921716-9511-3-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake --- trace-events | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'trace-events') diff --git a/trace-events b/trace-events index bdfe79f359..72136b9846 100644 --- a/trace-events +++ b/trace-events @@ -1031,9 +1031,9 @@ esp_pci_sbac_write(uint32_t reg, uint32_t val) "sbac: 0x%8.8x -> 0x%8.8x" # monitor.c handle_qmp_command(void *mon, const char *cmd_name) "mon %p cmd_name \"%s\"" monitor_protocol_emitter(void *mon) "mon %p" -monitor_protocol_event_handler(uint32_t event, void *data, uint64_t last, uint64_t now) "event=%d data=%p last=%" PRId64 " now=%" PRId64 +monitor_protocol_event_handler(uint32_t event, void *qdict) "event=%d data=%p" monitor_protocol_event_emit(uint32_t event, void *data) "event=%d data=%p" -monitor_protocol_event_queue(uint32_t event, void *data, uint64_t rate, uint64_t last, uint64_t now) "event=%d data=%p rate=%" PRId64 " last=%" PRId64 " now=%" PRId64 +monitor_protocol_event_queue(uint32_t event, void *qdict, uint64_t rate) "event=%d data=%p rate=%" PRId64 monitor_protocol_event_throttle(uint32_t event, uint64_t rate) "event=%d rate=%" PRId64 # hw/net/opencores_eth.c -- cgit v1.2.3-55-g7522