* [net-next PATCH v3 1/3] net: TCP thin-stream detection
@ 2010-02-11 12:07 Andreas Petlund
0 siblings, 0 replies; only message in thread
From: Andreas Petlund @ 2010-02-11 12:07 UTC (permalink / raw)
To: netdev@vger.kernel.org
Cc: Ilpo Järvinen, Eric Dumazet, Arnd Hannemann, LKML,
shemminger, David Miller, william.allen.simpson, damian
No changes here from v2.
Signed-off-by: Andreas Petlund <apetlund@simula.no>
---
include/net/tcp.h | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 87d164b..e5e2056 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1386,6 +1386,13 @@ static inline void tcp_highest_sack_combine(struct sock *sk,
tcp_sk(sk)->highest_sack = new;
}
+/* Determines whether this is a thin stream (which may suffer from
+ * increased latency). Used to trigger latency-reducing mechanisms.*/
+static inline unsigned int tcp_stream_is_thin(struct tcp_sock *tp)
+{
+ return tp->packets_out < 4 && !tcp_in_initial_slowstart(tp);
+}
+
/* /proc */
enum tcp_seq_states {
TCP_SEQ_STATE_LISTENING,
--
1.6.3.3
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2010-02-11 12:07 [net-next PATCH v3 1/3] net: TCP thin-stream detection Andreas Petlund
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