Date: Thu, 25 Aug 2011 00:17:16 +0000 From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: George Neville-Neil <gnn@neville-neil.com> Cc: arch@freebsd.org Subject: Re: Updating our TCP and socket sysctl values... Message-ID: <14F25601-6F2A-40F7-B4C7-82139ECE7998@lists.zabbadoz.net> In-Reply-To: <72EBCA4C-B002-4A77-9D4B-28541C1933C1@neville-neil.com> References: <132388F1-44D9-45C9-AE05-1799A7A2DCD9@neville-neil.com> <D91D35DF-B846-40AB-8C3A-8F9A89DABA47@lists.zabbadoz.net> <72EBCA4C-B002-4A77-9D4B-28541C1933C1@neville-neil.com>
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On Aug 24, 2011, at 8:03 PM, George Neville-Neil wrote: > > On Aug 24, 2011, at 12:18 , Bjoern A. Zeeb wrote: > >> On Mar 19, 2011, at 6:37 AM, George Neville-Neil wrote: >> >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA1 >>> >>> Howdy, >>> >>> I believe it's time for us to upgrade our sysctl values for TCP sockets so that >>> they are more in line with the modern world. At the moment we have these limits on >>> our buffering: >>> >>> kern.ipc.maxsockbuf: 262144 >>> net.inet.tcp.recvbuf_max: 262144 >>> net.inet.tcp.sendbuf_max: 262144 >>> >>> I believe it's time to up these values to something that's in line with higher speed >>> local networks, such as 10G. Perhaps it's time to move these to 2MB instead of 256K. >>> >>> Thoughts? >> >> >> This never happened, did it? Was there a reason? >> > > I went back and looked at the mail thread. I didn't see any strong objections > so I think you should commit this for 9.x. > > np@ did point out that nmbclusters also lags on modern hardware so consider upping > that at the same time. The below seems to need a cast for max_sb_adj which is already present for the sysctl; currently doing a universe and will send it to re@. Thanks for the reply. nmbclusters is harder to change as it's not just a max but directly needs/eats memory so we cannot just up it; we'll have to look into auto-tuning after 9 was branched and can possibly merge it for 9.1 or so. /bz >> Index: sys/netinet/tcp_input.c >> =================================================================== >> --- sys/netinet/tcp_input.c (revision 225048) >> +++ sys/netinet/tcp_input.c (working copy) >> @@ -195,7 +195,7 @@ SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_i >> &VNET_NAME(tcp_autorcvbuf_inc), 0, >> "Incrementor step size of automatic receive buffer"); >> >> -VNET_DEFINE(int, tcp_autorcvbuf_max) = 256*1024; >> +VNET_DEFINE(int, tcp_autorcvbuf_max) = 2*1024*1024; >> #define V_tcp_autorcvbuf_max VNET(tcp_autorcvbuf_max) >> SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_max, CTLFLAG_RW, >> &VNET_NAME(tcp_autorcvbuf_max), 0, >> Index: sys/netinet/tcp_output.c >> =================================================================== >> --- sys/netinet/tcp_output.c (revision 225048) >> +++ sys/netinet/tcp_output.c (working copy) >> @@ -117,7 +117,7 @@ SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, sendbuf_i >> &VNET_NAME(tcp_autosndbuf_inc), 0, >> "Incrementor step size of automatic send buffer"); >> >> -VNET_DEFINE(int, tcp_autosndbuf_max) = 256*1024; >> +VNET_DEFINE(int, tcp_autosndbuf_max) = 2*1024*1024; >> #define V_tcp_autosndbuf_max VNET(tcp_autosndbuf_max) >> SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, sendbuf_max, CTLFLAG_RW, >> &VNET_NAME(tcp_autosndbuf_max), 0, >> Index: sys/sys/sockbuf.h >> =================================================================== >> --- sys/sys/sockbuf.h (revision 225048) >> +++ sys/sys/sockbuf.h (working copy) >> @@ -37,7 +37,7 @@ >> #include <sys/_mutex.h> >> #include <sys/_sx.h> >> >> -#define SB_MAX (256*1024) /* default for max chars in sockbuf */ >> +#define SB_MAX (2*1024*1024) /* default for max chars in sockbuf */ >> >> /* >> * Constants for sb_flags field of struct sockbuf. >> >> -- >> Bjoern A. Zeeb You have to have visions! >> Stop bit received. Insert coin for new address family. >> >> _______________________________________________ >> freebsd-arch@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-arch >> To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org" > > _______________________________________________ > freebsd-arch@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arch > To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org" -- Bjoern A. Zeeb You have to have visions! Stop bit received. Insert coin for new address family.help
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