Date: Sat, 16 Nov 2019 11:57:12 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r354773 - head/sys/netinet/cc Message-ID: <201911161157.xAGBvCRm006096@repo.freebsd.org>
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Author: tuexen Date: Sat Nov 16 11:57:12 2019 New Revision: 354773 URL: https://svnweb.freebsd.org/changeset/base/354773 Log: Improve TCP CUBIC specific after idle reaction. The adjustments are inspired by the Linux stack, which has had a functionally equivalent implementation for more than a decade now. Submitted by: Richard Scheffenegger Reviewed by: Cheng Cui Differential Revision: https://reviews.freebsd.org/D18982 Modified: head/sys/netinet/cc/cc_cubic.c Modified: head/sys/netinet/cc/cc_cubic.c ============================================================================== --- head/sys/netinet/cc/cc_cubic.c Sat Nov 16 11:37:26 2019 (r354772) +++ head/sys/netinet/cc/cc_cubic.c Sat Nov 16 11:57:12 2019 (r354773) @@ -190,6 +190,8 @@ cubic_ack_received(struct cc_var *ccv, uint16_t type) if (cubic_data->num_cong_events == 0 && cubic_data->max_cwnd < CCV(ccv, snd_cwnd)) cubic_data->max_cwnd = CCV(ccv, snd_cwnd); + cubic_data->K = cubic_k(cubic_data->max_cwnd / + CCV(ccv, t_maxseg)); } } } @@ -205,6 +207,9 @@ cubic_after_idle(struct cc_var *ccv) struct cubic *cubic_data; cubic_data = ccv->cc_data; + + cubic_data->max_cwnd = ulmax(cubic_data->max_cwnd, CCV(ccv, snd_cwnd)); + cubic_data->K = cubic_k(cubic_data->max_cwnd / CCV(ccv, t_maxseg)); newreno_cc_algo.after_idle(ccv); cubic_data->t_last_cong = ticks;
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