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Message-Id: <1268351407-7394-5-git-send-email-andy.grover@oracle.com> Date: Thu, 11 Mar 2010 15:49:58 -0800 From: Andy Grover <andy.grover@...cle.com> To: netdev@...r.kernel.org Cc: rds-devel@....oracle.com Subject: [PATCH 04/13] RDS/TCP: Wait to wake thread when write space available Instead of waking the send thread whenever any send space is available, wait until it is at least half empty. This is modeled on how sock_def_write_space() does it, and may help to minimize context switches. Signed-off-by: Andy Grover <andy.grover@...cle.com> --- net/rds/tcp_send.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/net/rds/tcp_send.c b/net/rds/tcp_send.c index 34fdcc0..a28b895 100644 --- a/net/rds/tcp_send.c +++ b/net/rds/tcp_send.c @@ -240,7 +240,9 @@ void rds_tcp_write_space(struct sock *sk) tc->t_last_seen_una = rds_tcp_snd_una(tc); rds_send_drop_acked(conn, rds_tcp_snd_una(tc), rds_tcp_is_acked); - queue_delayed_work(rds_wq, &conn->c_send_w, 0); + if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) + queue_delayed_work(rds_wq, &conn->c_send_w, 0); + out: read_unlock(&sk->sk_callback_lock); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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