Set TCP_NODELAY to avoid big latency between sending data-in and sending
command response on reads, and to make sure the response goes out
promptly for completed writes.
Signed-off-by: Pete Wyckoff <[EMAIL PROTECTED]>
---
usr/iscsi/iscsi_tcp.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/usr/iscsi/iscsi_tcp.c b/usr/iscsi/iscsi_tcp.c
index c4d08a1..09ed0e5 100644
--- a/usr/iscsi/iscsi_tcp.c
+++ b/usr/iscsi/iscsi_tcp.c
@@ -78,6 +78,15 @@ static int set_keepalive(int fd)
return 0;
}
+static int set_nodelay(int fd)
+{
+ int ret, opt;
+
+ opt = 1;
+ ret = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
+ return ret;
+}
+
static void accept_connection(int afd, int events, void *data)
{
struct sockaddr_storage from;
@@ -99,6 +108,10 @@ static void accept_connection(int afd, int events, void
*data)
if (ret)
goto out;
+ ret = set_nodelay(fd);
+ if (ret)
+ goto out;
+
tcp_conn = zalloc(sizeof(*tcp_conn));
if (!tcp_conn)
goto out;
--
1.5.3.8
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