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authorAllan Stephens <allan.stephens@windriver.com>2007-06-10 17:25:24 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-10 22:06:12 -0700
commit05646c91109bfd129361d57dc5d98464ab6f6578 (patch)
tree647639854d1ffb86820d2304419cbcb1bec21451 /include/net/tipc/tipc_port.h
parent[TIPC]: Use standard socket "not implemented" routines (diff)
downloadlinux-dev-05646c91109bfd129361d57dc5d98464ab6f6578.tar.xz
linux-dev-05646c91109bfd129361d57dc5d98464ab6f6578.zip
[TIPC]: Optimize stream send routine to avoid fragmentation
This patch enhances TIPC's stream socket send routine so that it avoids transmitting data in chunks that require fragmentation and reassembly, thereby improving performance at both the sending and receiving ends of the connection. The "maximum packet size" hint that records MTU info allows the socket to decide how big a chunk it should send; in the event that the hint has become stale, fragmentation may still occur, but the data will be passed correctly and the hint will be updated in time for the following send. Note: The 66060 byte pseudo-MTU used for intra-node connections requires the send routine to perform an additional check to ensure it does not exceed TIPC"s limit of 66000 bytes of user data per chunk. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Jon Paul Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tipc/tipc_port.h')
-rw-r--r--include/net/tipc/tipc_port.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/net/tipc/tipc_port.h b/include/net/tipc/tipc_port.h
index 333bba6dc522..cfc4ba46de8f 100644
--- a/include/net/tipc/tipc_port.h
+++ b/include/net/tipc/tipc_port.h
@@ -1,8 +1,8 @@
/*
* include/net/tipc/tipc_port.h: Include file for privileged access to TIPC ports
*
- * Copyright (c) 1994-2006, Ericsson AB
- * Copyright (c) 2005, Wind River Systems
+ * Copyright (c) 1994-2007, Ericsson AB
+ * Copyright (c) 2005-2007, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -55,6 +55,7 @@
* @conn_unacked: number of unacknowledged messages received from peer port
* @published: non-zero if port has one or more associated names
* @congested: non-zero if cannot send because of link or port congestion
+ * @max_pkt: maximum packet size "hint" used when building messages sent by port
* @ref: unique reference to port in TIPC object registry
* @phdr: preformatted message header used when sending messages
*/
@@ -68,6 +69,7 @@ struct tipc_port {
u32 conn_unacked;
int published;
u32 congested;
+ u32 max_pkt;
u32 ref;
struct tipc_msg phdr;
};