Differential D33035 Diff 102444 sys/netinet/cc/cc.c

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sys/netinet/cc/cc.c

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/*		/*
* Have a sane default if no CC_DEFAULT is specified in the kernel config file.		* Have a sane default if no CC_DEFAULT is specified in the kernel config file.
*/		*/
#ifndef CC_DEFAULT		#ifndef CC_DEFAULT
#define CC_DEFAULT "newreno"		#define CC_DEFAULT "newreno"
#endif		#endif

		uint32_t hystart_minrtt_thresh = 4000;
		uint32_t hystart_maxrtt_thresh = 16000;
		uint32_t hystart_n_rttsamples = 8;
		uint32_t hystart_css_growth_div = 4;
		uint32_t hystart_css_rounds = 5;
		uint32_t hystart_bblogs = 0;

MALLOC_DEFINE(M_CC_MEM, "CC Mem", "Congestion Control State memory");		MALLOC_DEFINE(M_CC_MEM, "CC Mem", "Congestion Control State memory");

/*		/*
* List of available cc algorithms on the current system. First element		* List of available cc algorithms on the current system. First element
* is used as the system default CC algorithm.		* is used as the system default CC algorithm.
*/		*/
struct cc_head cc_list = STAILQ_HEAD_INITIALIZER(cc_list);		struct cc_head cc_list = STAILQ_HEAD_INITIALIZER(cc_list);

▲ Show 20 Lines • Show All 481 Lines • ▼ Show 20 Lines	SYSCTL_PROC(_net_inet_tcp_cc, OID_AUTO, algorithm,
CTLFLAG_VNET \| CTLTYPE_STRING \| CTLFLAG_RW \| CTLFLAG_MPSAFE,		CTLFLAG_VNET \| CTLTYPE_STRING \| CTLFLAG_RW \| CTLFLAG_MPSAFE,
NULL, 0, cc_default_algo, "A",		NULL, 0, cc_default_algo, "A",
"Default congestion control algorithm");		"Default congestion control algorithm");

SYSCTL_PROC(_net_inet_tcp_cc, OID_AUTO, available,		SYSCTL_PROC(_net_inet_tcp_cc, OID_AUTO, available,
CTLTYPE_STRING \| CTLFLAG_RD \| CTLFLAG_MPSAFE,		CTLTYPE_STRING \| CTLFLAG_RD \| CTLFLAG_MPSAFE,
NULL, 0, cc_list_available, "A",		NULL, 0, cc_list_available, "A",
"List available congestion control algorithms");		"List available congestion control algorithms");

		SYSCTL_NODE(_net_inet_tcp_cc, OID_AUTO, hystartplusplus,
		CTLFLAG_RW \| CTLFLAG_MPSAFE, NULL,
		"New Reno related HyStart++ settings");

		SYSCTL_UINT(_net_inet_tcp_cc_hystartplusplus, OID_AUTO, minrtt_thresh,
		CTLFLAG_RW,
		&hystart_minrtt_thresh, 4000,
		"HyStarts++ minimum RTT thresh used in clamp (in microseconds)");

		SYSCTL_UINT(_net_inet_tcp_cc_hystartplusplus, OID_AUTO, maxrtt_thresh,
		CTLFLAG_RW,
		&hystart_maxrtt_thresh, 16000,
		"HyStarts++ maximum RTT thresh used in clamp (in microseconds)");

		SYSCTL_UINT(_net_inet_tcp_cc_hystartplusplus, OID_AUTO, n_rttsamples,
		CTLFLAG_RW,
		&hystart_n_rttsamples, 8,
		"The number of RTT samples that must be seen to consider HyStart++");

		SYSCTL_UINT(_net_inet_tcp_cc_hystartplusplus, OID_AUTO, css_growth_div,
		CTLFLAG_RW,
		&hystart_css_growth_div, 4,
		"The divisor to the growth when in Hystart++ CSS");

		SYSCTL_UINT(_net_inet_tcp_cc_hystartplusplus, OID_AUTO, css_rounds,
		CTLFLAG_RW,
		&hystart_css_rounds, 5,
		"The number of rounds HyStart++ lasts in CSS before falling to CA");

		SYSCTL_UINT(_net_inet_tcp_cc_hystartplusplus, OID_AUTO, bblogs,
		CTLFLAG_RW,
		&hystart_bblogs, 0,
		"Do we enable HyStart++ Black Box logs to be generated if BB logging is on");

VNET_DEFINE(int, cc_do_abe) = 0;		VNET_DEFINE(int, cc_do_abe) = 0;
SYSCTL_INT(_net_inet_tcp_cc, OID_AUTO, abe, CTLFLAG_VNET \| CTLFLAG_RW,		SYSCTL_INT(_net_inet_tcp_cc, OID_AUTO, abe, CTLFLAG_VNET \| CTLFLAG_RW,
&VNET_NAME(cc_do_abe), 0,		&VNET_NAME(cc_do_abe), 0,
"Enable draft-ietf-tcpm-alternativebackoff-ecn (TCP Alternative Backoff with ECN)");		"Enable draft-ietf-tcpm-alternativebackoff-ecn (TCP Alternative Backoff with ECN)");

VNET_DEFINE(int, cc_abe_frlossreduce) = 0;		VNET_DEFINE(int, cc_abe_frlossreduce) = 0;
SYSCTL_INT(_net_inet_tcp_cc, OID_AUTO, abe_frlossreduce, CTLFLAG_VNET \| CTLFLAG_RW,		SYSCTL_INT(_net_inet_tcp_cc, OID_AUTO, abe_frlossreduce, CTLFLAG_VNET \| CTLFLAG_RW,
&VNET_NAME(cc_abe_frlossreduce), 0,		&VNET_NAME(cc_abe_frlossreduce), 0,
"Apply standard beta instead of ABE-beta during ECN-signalled congestion "		"Apply standard beta instead of ABE-beta during ECN-signalled congestion "
"recovery episodes if loss also needs to be repaired");		"recovery episodes if loss also needs to be repaired");