From c8e5deca76f2995fe899783c46f666388101e2b3 Mon Sep 17 00:00:00 2001 From: Michael Davidsaver Date: Fri, 29 Mar 2019 15:29:22 -0700 Subject: [PATCH] dbEvent tweak Queue size --- modules/database/src/ioc/db/dbEvent.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/modules/database/src/ioc/db/dbEvent.c b/modules/database/src/ioc/db/dbEvent.c index 9304f99b2..77b12de8d 100644 --- a/modules/database/src/ioc/db/dbEvent.c +++ b/modules/database/src/ioc/db/dbEvent.c @@ -49,7 +49,13 @@ #include "link.h" #include "special.h" -#define EVENTSPERQUE 32 +/* Queue size based on Ethernet MTU of 1500 bytes. + * Assume <=66 bytes of ethernet+IP+TCP overhead + * and 40 byte CA messages (DBF_TIME_DOUBLE). + * + * (1500-66)/40 -> 35 + */ +#define EVENTSPERQUE 36 #define EVENTENTRIES 4 /* the number of que entries for each event */ #define EVENTQUESIZE (EVENTENTRIES * EVENTSPERQUE) #define EVENTQEMPTY ((struct evSubscrip *)NULL)