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authorSimon Zhang <yuwei1.zhang@intel.com>2020-09-15 23:40:28 +0800
committerSimon Zhang <yuwei1.zhang@intel.com>2020-09-16 02:18:01 +0000
commit23c3d349e52e57600aaaf3ef32e4264fffb2d0db (patch)
tree12406d14b5d8fc24bcfbba42c514171d983e6abd /src
parent2237cc8ce1e0eb7222a34bb30bdeb2f3f1df9a81 (diff)
tcp: make max gso packet size configurable
Type: improvement Signed-off-by: Simon Zhang <yuwei1.zhang@intel.com> Change-Id: I14de90f07d825c5c99023996a88173ee855e9a6f
Diffstat (limited to 'src')
-rw-r--r--src/vnet/tcp/tcp.c3
-rw-r--r--src/vnet/tcp/tcp.h3
-rw-r--r--src/vnet/tcp/tcp_cli.c4
3 files changed, 8 insertions, 2 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index 1563be4eb86..a4599c2fd98 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -877,7 +877,7 @@ tcp_session_cal_goal_size (tcp_connection_t * tc)
{
u16 goal_size = tc->snd_mss;
- goal_size = TCP_MAX_GSO_SZ - tc->snd_mss % TCP_MAX_GSO_SZ;
+ goal_size = tcp_cfg.max_gso_size - tc->snd_mss % tcp_cfg.max_gso_size;
goal_size = clib_min (goal_size, tc->snd_wnd / 2);
return goal_size > tc->snd_mss ? goal_size : tc->snd_mss;
@@ -1430,6 +1430,7 @@ tcp_configuration_init (void)
tcp_cfg.csum_offload = 1;
tcp_cfg.cc_algo = TCP_CC_CUBIC;
tcp_cfg.rwnd_min_update_ack = 1;
+ tcp_cfg.max_gso_size = TCP_MAX_GSO_SZ;
/* Time constants defined as timer tick (100ms) multiples */
tcp_cfg.delack_time = 1; /* 0.1s */
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index bc6e353b60e..29d30dc0691 100644
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -193,6 +193,9 @@ typedef struct tcp_configuration_
/** Number of preallocated half-open connections */
u32 preallocated_half_open_connections;
+ /** Maxium allowed GSO packet size */
+ u32 max_gso_size;
+
/** Vectors of src addresses. Optional unless one needs > 63K active-opens */
ip4_address_t *ip4_src_addrs;
ip6_address_t *ip6_src_addrs;
diff --git a/src/vnet/tcp/tcp_cli.c b/src/vnet/tcp/tcp_cli.c
index edd4d2d1bc1..94ee21f91bc 100644
--- a/src/vnet/tcp/tcp_cli.c
+++ b/src/vnet/tcp/tcp_cli.c
@@ -1050,7 +1050,7 @@ unformat_tcp_cc_algo_cfg (unformat_input_t * input, va_list * va)
static clib_error_t *
tcp_config_fn (vlib_main_t * vm, unformat_input_t * input)
{
- u32 cwnd_multiplier, tmp_time, mtu;
+ u32 cwnd_multiplier, tmp_time, mtu, max_gso_size;
uword memory_size;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
@@ -1100,6 +1100,8 @@ tcp_config_fn (vlib_main_t * vm, unformat_input_t * input)
tcp_cfg.allow_tso = 1;
else if (unformat (input, "no-csum-offload"))
tcp_cfg.csum_offload = 0;
+ else if (unformat (input, "max-gso-size %u", &max_gso_size))
+ tcp_cfg.max_gso_size = clib_min (max_gso_size, TCP_MAX_GSO_SZ);
else if (unformat (input, "cc-algo %U", unformat_tcp_cc_algo,
&tcp_cfg.cc_algo))
;