svn commit: r354708 - head/sys/netinet/cc

[Kubilay Kocak]

On 15/11/2019 3:28 am, Michael Tuexen wrote:
> Author: tuexen
> Date: Thu Nov 14 16:28:02 2019
> New Revision: 354708
> URL: https://svnweb.freebsd.org/changeset/base/354708
> 
> Log:
>    For idle TCP sessions using the CUBIC congestio control, reset ssthresh
>    to the higher of the previous ssthresh or 3/4 of the prior cwnd.
>    
>    Submitted by:		Richard Scheffenegger
>    Reviewed by:		Cheng Cui
>    Differential Revision:	https://reviews.freebsd.org/D18982
> 
> Modified:
>    head/sys/netinet/cc/cc_cubic.c

Are stable/12,11 affected by this too?

> Modified: head/sys/netinet/cc/cc_cubic.c
> ==============================================================================
> --- head/sys/netinet/cc/cc_cubic.c	Thu Nov 14 15:10:01 2019	(r354707)
> +++ head/sys/netinet/cc/cc_cubic.c	Thu Nov 14 16:28:02 2019	(r354708)
> @@ -78,6 +78,7 @@ static int	cubic_mod_init(void);
>   static void	cubic_post_recovery(struct cc_var *ccv);
>   static void	cubic_record_rtt(struct cc_var *ccv);
>   static void	cubic_ssthresh_update(struct cc_var *ccv);
> +static void	cubic_after_idle(struct cc_var *ccv);
>   
>   struct cubic {
>   	/* Cubic K in fixed point form with CUBIC_SHIFT worth of precision. */
> @@ -112,6 +113,7 @@ struct cc_algo cubic_cc_algo = {
>   	.conn_init = cubic_conn_init,
>   	.mod_init = cubic_mod_init,
>   	.post_recovery = cubic_post_recovery,
> +	.after_idle = cubic_after_idle,
>   };
>   
>   static void
> @@ -192,7 +194,24 @@ cubic_ack_received(struct cc_var *ccv, uint16_t type)
>   	}
>   }
>   
> +/*
> + * This is a Cubic specific implementation of after_idle.
> + *   - Reset cwnd by calling New Reno implementation of after_idle.
> + *   - Reset t_last_cong.
> + */
>   static void
> +cubic_after_idle(struct cc_var *ccv)
> +{
> +	struct cubic *cubic_data;
> +
> +	cubic_data = ccv->cc_data;
> +
> +	newreno_cc_algo.after_idle(ccv);
> +	cubic_data->t_last_cong = ticks;
> +}
> +
> +
> +static void
>   cubic_cb_destroy(struct cc_var *ccv)
>   {
>   	free(ccv->cc_data, M_CUBIC);
> @@ -287,9 +306,6 @@ cubic_conn_init(struct cc_var *ccv)
>   static int
>   cubic_mod_init(void)
>   {
> -
> -	cubic_cc_algo.after_idle = newreno_cc_algo.after_idle;
> -
>   	return (0);
>   }
>   
> _______________________________________________
> svn-src-head at freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/svn-src-head
> To unsubscribe, send any mail to "svn-src-head-unsubscribe at freebsd.org"
>