Date: Wed, 11 Mar 2015 17:35:08 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r279892 - head/sys/dev/cxgbe/tom Message-ID: <201503111735.t2BHZ8rp027064@svn.freebsd.org>
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Author: jhb Date: Wed Mar 11 17:35:07 2015 New Revision: 279892 URL: https://svnweb.freebsd.org/changeset/base/279892 Log: Resize receive socket buffers that support autosizing when receiving TCP data via direct data placement. Sponsored by: Chelsio MFC after: 1 week Modified: head/sys/dev/cxgbe/tom/t4_ddp.c Modified: head/sys/dev/cxgbe/tom/t4_ddp.c ============================================================================== --- head/sys/dev/cxgbe/tom/t4_ddp.c Wed Mar 11 16:02:24 2015 (r279891) +++ head/sys/dev/cxgbe/tom/t4_ddp.c Wed Mar 11 17:35:07 2015 (r279892) @@ -65,6 +65,13 @@ __FBSDID("$FreeBSD$"); #include "common/t4_tcb.h" #include "tom/t4_tom.h" +VNET_DECLARE(int, tcp_do_autorcvbuf); +#define V_tcp_do_autorcvbuf VNET(tcp_do_autorcvbuf) +VNET_DECLARE(int, tcp_autorcvbuf_inc); +#define V_tcp_autorcvbuf_inc VNET(tcp_autorcvbuf_inc) +VNET_DECLARE(int, tcp_autorcvbuf_max); +#define V_tcp_autorcvbuf_max VNET(tcp_autorcvbuf_max) + #define PPOD_SZ(n) ((n) * sizeof(struct pagepod)) #define PPOD_SIZE (PPOD_SZ(1)) @@ -411,6 +418,21 @@ handle_ddp_data(struct toepcb *toep, __b else discourage_ddp(toep); + /* receive buffer autosize */ + if (sb->sb_flags & SB_AUTOSIZE && + V_tcp_do_autorcvbuf && + sb->sb_hiwat < V_tcp_autorcvbuf_max && + len > (sbspace(sb) / 8 * 7)) { + unsigned int hiwat = sb->sb_hiwat; + unsigned int newsize = min(hiwat + V_tcp_autorcvbuf_inc, + V_tcp_autorcvbuf_max); + + if (!sbreserve_locked(sb, newsize, so, NULL)) + sb->sb_flags &= ~SB_AUTOSIZE; + else + toep->rx_credits += newsize - hiwat; + } + KASSERT(toep->sb_cc >= sbused(sb), ("%s: sb %p has more data (%d) than last time (%d).", __func__, sb, sbused(sb), toep->sb_cc));
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