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SOCKET set TCP_NODELAY on iscsi->fd

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This will set TCP_NODELAY on the socket connection
to the target. This is the first step to improve latency.
For systems supporting TCP_CORK we plan to add a cork
around certain PDUs e.g. DATA-Out, but this needs further
testing.

Signed-off-by: Peter Lieven <pl@kamp.de>
This commit is contained in:
Peter Lieven
2012-12-07 14:50:58 +01:00
parent f215fc30c5
commit 752c0ad396
1 changed files with 6 additions and 0 deletions
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lib/socket.c
+6
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@@ -283,6 +283,12 @@ iscsi_connect_async(struct iscsi_context *iscsi, const char *portal,
} }
#endif #endif
if (set_tcp_sockopt(iscsi->fd, TCP_NODELAY, 1) != 0) {
ISCSI_LOG(iscsi,1,"failed to set TCP_NODELAY sockopt: %s",strerror(errno));
} else {
ISCSI_LOG(iscsi,3,"TCP_NODELAY set to 1");
}
if (connect(iscsi->fd, ai->ai_addr, socksize) != 0 if (connect(iscsi->fd, ai->ai_addr, socksize) != 0
&& errno != EINPROGRESS) { && errno != EINPROGRESS) {
iscsi_set_error(iscsi, "Connect failed with errno : " iscsi_set_error(iscsi, "Connect failed with errno : "