aboutsummaryrefslogtreecommitdiffstats
path: root/net/ipv4/tcp_cubic.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@g5.osdl.org>2006-10-26 10:44:07 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-26 10:44:07 -0400
commit2a4f739dfc59edd52eaa37d63af1bd830ea42318 (patch)
tree962bb3b4bfc6de0b8d5f8cfd90b1bb6c5eadc338 /net/ipv4/tcp_cubic.c
parent0bb78c3715ec9ee528d92177bc94ffcc94bed5a8 (diff)
parent1842c4bef61f985fbec6df7150041b85d8b52b1a (diff)
Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [BRIDGE]: correct print message typo [TCP] H-TCP: fix integer overflow [TCP] cubic: scaling error
Diffstat (limited to 'net/ipv4/tcp_cubic.c')
-rw-r--r--net/ipv4/tcp_cubic.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index a60ef38d75c6..6ad184802266 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -190,7 +190,7 @@ static inline void bictcp_update(struct bictcp *ca, u32 cwnd)
190 */ 190 */
191 191
192 /* change the unit from HZ to bictcp_HZ */ 192 /* change the unit from HZ to bictcp_HZ */
193 t = ((tcp_time_stamp + ca->delay_min - ca->epoch_start) 193 t = ((tcp_time_stamp + (ca->delay_min>>3) - ca->epoch_start)
194 << BICTCP_HZ) / HZ; 194 << BICTCP_HZ) / HZ;
195 195
196 if (t < ca->bic_K) /* t - K */ 196 if (t < ca->bic_K) /* t - K */
@@ -259,7 +259,7 @@ static inline void measure_delay(struct sock *sk)
259 (s32)(tcp_time_stamp - ca->epoch_start) < HZ) 259 (s32)(tcp_time_stamp - ca->epoch_start) < HZ)
260 return; 260 return;
261 261
262 delay = tcp_time_stamp - tp->rx_opt.rcv_tsecr; 262 delay = (tcp_time_stamp - tp->rx_opt.rcv_tsecr)<<3;
263 if (delay == 0) 263 if (delay == 0)
264 delay = 1; 264 delay = 1;
265 265
@@ -366,7 +366,7 @@ static int __init cubictcp_register(void)
366 366
367 beta_scale = 8*(BICTCP_BETA_SCALE+beta)/ 3 / (BICTCP_BETA_SCALE - beta); 367 beta_scale = 8*(BICTCP_BETA_SCALE+beta)/ 3 / (BICTCP_BETA_SCALE - beta);
368 368
369 cube_rtt_scale = (bic_scale << 3) / 10; /* 1024*c/rtt */ 369 cube_rtt_scale = (bic_scale * 10); /* 1024*c/rtt */
370 370
371 /* calculate the "K" for (wmax-cwnd) = c/rtt * K^3 371 /* calculate the "K" for (wmax-cwnd) = c/rtt * K^3
372 * so K = cubic_root( (wmax-cwnd)*rtt/c ) 372 * so K = cubic_root( (wmax-cwnd)*rtt/c )