tcp_cubic.c File Reference

#include <linux/mm.h>
#include <linux/module.h>
#include <linux/math64.h>
#include <net/tcp.h>

Go to the source code of this file.

Data Structures
struct	bictcp

Macros
#define	BICTCP_BETA_SCALE
#define	BICTCP_HZ   10 /* BIC HZ 2^10 = 1024 */
#define	HYSTART_ACK_TRAIN   0x1
#define	HYSTART_DELAY   0x2
#define	HYSTART_MIN_SAMPLES   8
#define	HYSTART_DELAY_MIN   (4U<<3)
#define	HYSTART_DELAY_MAX   (16U<<3)
#define	HYSTART_DELAY_THRESH(x)   clamp(x, HYSTART_DELAY_MIN, HYSTART_DELAY_MAX)
#define	ACK_RATIO_SHIFT   4
#define	ACK_RATIO_LIMIT   (32u << ACK_RATIO_SHIFT)

Functions
	module_param (fast_convergence, int, 0644)
	MODULE_PARM_DESC (fast_convergence,"turn on/off fast convergence")
	module_param (beta, int, 0644)
	MODULE_PARM_DESC (beta,"beta for multiplicative increase")
	module_param (initial_ssthresh, int, 0644)
	MODULE_PARM_DESC (initial_ssthresh,"initial value of slow start threshold")
	module_param (bic_scale, int, 0444)
	MODULE_PARM_DESC (bic_scale,"scale (scaled by 1024) value for bic function (bic_scale/1024)")
	module_param (tcp_friendliness, int, 0644)
	MODULE_PARM_DESC (tcp_friendliness,"turn on/off tcp friendliness")
	module_param (hystart, int, 0644)
	MODULE_PARM_DESC (hystart,"turn on/off hybrid slow start algorithm")
	module_param (hystart_detect, int, 0644)
	MODULE_PARM_DESC (hystart_detect,"hyrbrid slow start detection mechanisms"" 1: packet-train 2: delay 3: both packet-train and delay")
	module_param (hystart_low_window, int, 0644)
	MODULE_PARM_DESC (hystart_low_window,"lower bound cwnd for hybrid slow start")
	module_param (hystart_ack_delta, int, 0644)
	MODULE_PARM_DESC (hystart_ack_delta,"spacing between ack's indicating train (msecs)")
	module_init (cubictcp_register)
	module_exit (cubictcp_unregister)
	MODULE_AUTHOR ("Sangtae Ha, Stephen Hemminger")
	MODULE_LICENSE ("GPL")
	MODULE_DESCRIPTION ("CUBIC TCP")
	MODULE_VERSION ("2.3")

Macro Definition Documentation

#define ACK_RATIO_LIMIT   (32u << ACK_RATIO_SHIFT)

Definition at line 94 of file tcp_cubic.c.

#define ACK_RATIO_SHIFT   4

Definition at line 93 of file tcp_cubic.c.

#define BICTCP_BETA_SCALE

Value:

1024    /* Scale factor beta calculation
                     * max_cwnd = snd_cwnd * beta
                     */

Definition at line 31 of file tcp_cubic.c.

#define BICTCP_HZ   10 /* BIC HZ 2^10 = 1024 */

Definition at line 32 of file tcp_cubic.c.

#define HYSTART_ACK_TRAIN   0x1

Definition at line 35 of file tcp_cubic.c.

#define HYSTART_DELAY   0x2

Definition at line 36 of file tcp_cubic.c.

#define HYSTART_DELAY_MAX   (16U<<3)

Definition at line 41 of file tcp_cubic.c.

#define HYSTART_DELAY_MIN   (4U<<3)

Definition at line 40 of file tcp_cubic.c.

#define HYSTART_DELAY_THRESH

(

x

)

clamp(x, HYSTART_DELAY_MIN, HYSTART_DELAY_MAX)

Definition at line 42 of file tcp_cubic.c.

#define HYSTART_MIN_SAMPLES   8

Definition at line 39 of file tcp_cubic.c.

Function Documentation

MODULE_AUTHOR	(	"Sangtae	Ha,
		Stephen Hemminger"
	)

MODULE_DESCRIPTION

(

"CUBIC TCP"

)

module_exit

(

cubictcp_unregister

)

module_init

(

cubictcp_register

)

MODULE_LICENSE

(

"GPL"

)

module_param	(	fast_convergence	,
		int	,
		0644
	)

module_param	(	beta	,
		int	,
		0644
	)

module_param	(	initial_ssthresh	,
		int	,
		0644
	)

module_param	(	bic_scale	,
		int	,
		0444
	)

module_param	(	tcp_friendliness	,
		int	,
		0644
	)

module_param	(	hystart	,
		int	,
		0644
	)

module_param	(	hystart_detect	,
		int	,
		0644
	)

module_param	(	hystart_low_window	,
		int	,
		0644
	)

module_param	(	hystart_ack_delta	,
		int	,
		0644
	)

MODULE_PARM_DESC	(	fast_convergence	,
		"turn on/off fast convergence"
	)

MODULE_PARM_DESC	(	beta	,
		"beta for multiplicative increase"
	)

MODULE_PARM_DESC	(	initial_ssthresh	,
		"initial value of slow start threshold"
	)

MODULE_PARM_DESC	(	bic_scale	,
		"scale (scaled by 1024) value for bic function (bic_scale/1024)"
	)

MODULE_PARM_DESC	(	tcp_friendliness	,
		"turn on/off tcp friendliness"
	)

MODULE_PARM_DESC	(	hystart	,
		"turn on/off hybrid slow start algorithm"
	)

MODULE_PARM_DESC	(	hystart_detect	,
		"hyrbrid slow start detection mechanisms"" 1: packet-train 2: delay 3: both packet-train and delay"
	)

MODULE_PARM_DESC	(	hystart_low_window	,
		"lower bound cwnd for hybrid slow start"
	)

MODULE_PARM_DESC	(	hystart_ack_delta	,
		"spacing between ack's indicating train (msecs)"
	)

MODULE_VERSION

(

"2.3"

)