Experimental Physics and
Industrial Control System

George Vaughn <[email protected]> · Wed, 24 Mar 1999 10:24:45 -0700

Jeff,

Here's what it says...

Essex# /usr/sbin/ndd -set /dev/tcp tcp_time_wait_interval 5000
name is non-existent for this module
for a list of valid names, use name '?'
Essex# ndd /dev/tcp \?
?                             (read only)
tcp_close_wait_interval       (read and write)
tcp_conn_req_max_q            (read and write)
tcp_conn_req_max_q0           (read and write)
tcp_conn_req_min              (read and write)
tcp_conn_grace_period         (read and write)
tcp_cwnd_max                  (read and write)
tcp_debug                     (read and write)
tcp_smallest_nonpriv_port     (read and write)
tcp_ip_abort_cinterval        (read and write)
tcp_ip_abort_linterval        (read and write)
tcp_ip_abort_interval         (read and write)
tcp_ip_notify_cinterval       (read and write)
tcp_ip_notify_interval        (read and write)
tcp_ip_ttl                    (read and write)
tcp_keepalive_interval        (read and write)
tcp_maxpsz_multiplier         (read and write)
tcp_mss_def                   (read and write)
tcp_mss_max                   (read and write)
tcp_mss_min                   (read and write)
tcp_naglim_def                (read and write)
tcp_rexmit_interval_initial   (read and write)
tcp_rexmit_interval_max       (read and write)
tcp_rexmit_interval_min       (read and write)
tcp_wroff_xtra                (read and write)
tcp_deferred_ack_interval     (read and write)
tcp_snd_lowat_fraction        (read and write)
tcp_sth_rcv_hiwat             (read and write)
tcp_sth_rcv_lowat             (read and write)
tcp_dupack_fast_retransmit    (read and write)
tcp_ignore_path_mtu           (read and write)
tcp_rcv_push_wait             (read and write)
tcp_smallest_anon_port        (read and write)
tcp_largest_anon_port         (read and write)
tcp_xmit_hiwat                (read and write)
tcp_xmit_lowat                (read and write)
tcp_recv_hiwat                (read and write)
tcp_recv_hiwat_minmss         (read and write)
tcp_fin_wait_2_flush_interval (read and write)
tcp_co_min                    (read and write)
tcp_max_buf                   (read and write)
tcp_zero_win_probesize        (read and write)
tcp_strong_iss                (read and write)
tcp_rtt_updates               (read and write)
tcp_wscale_always             (read and write)
tcp_tstamp_always             (read and write)
tcp_tstamp_if_wscale          (read and write)
tcp_rexmit_interval_extra     (read and write)
tcp_deferred_acks_max         (read and write)
tcp_slow_start_after_idle     (read and write)
tcp_slow_start_initial        (read and write)
tcp_co_timer_interval         (read and write)
tcp_extra_priv_ports          (read only)
tcp_extra_priv_ports_add      (write only)
tcp_extra_priv_ports_del      (write only)
tcp_status                    (read only)
tcp_bind_hash                 (read only)
tcp_listen_hash               (read only)
tcp_conn_hash                 (read only)
tcp_queue_hash                (read only)
tcp_host_param                (read and write)
tcp_1948_phrase               (write only)
Essex# logout

At 09:51 AM 3/24/99 -0700, Jeff Hill wrote:
>
>I overheard this interesting tidbit on the WRS mail list this morning!
>This is certainly relevant to our situation here.
>
>Jeff
>
>-----Original Message-----
>From:	the vxWorks Users Group Exploder [SMTP:[email protected]]
>Sent:	Tuesday, March 23, 1999 9:40 AM
>To:	[email protected]
>Subject:	RE: Slow TCP/IP Sockets
>
>Submitted-by owner-vxwexplo-process  Tue Mar 23 08:39:32 1999
>Submitted-by: "Sowko, Nick" <[email protected]>
>
>
>TSR #116602 addresses the slow boot problem on Solaris 2.6 (expecially
>noticed going from 2.5.1 to 2.6)
>
>
>
>TITLE: Why does Solaris 2.6 take so long to boot vxworks?
>
>AUTHOR: David Holloway
>
>                         SCOPE                   DISCOVERED ON
>
>              HOST:  Solaris 2.6 / All     Solaris 2.6
>                     -------------------     -------------------
>      ARCHITECTURE:  All     PowerPC
>                     -------------------     -------------------
>               BSP:  All     mtx603
>                     -------------------     -------------------
>PRODUCT / REVISION:  N/A     vxWorks 5.3.1
>                     -------------------     -------------------
>
>DESCRIPTION:
>
> It takes far too long to boot vxworks using a solaris 2.6 ftp
> server under the following conditions:
> 1. when it is rebooted in quick succession.
> 2. when symbol tables loaded via the network take too long to load.
>
>RESEARCH:
>
>The bootrom uses a local port number to download vxWorks.  VxWorks will
>attempt to use the same port number to download vxWorks.sym.  In accordance
>with TCP/IP's proper implementation, after the bootrom's transaction,
>Solaris 2.6 still has a connection in a TIME_WAIT state as vxWorks attempts
>to download vxWorks.sym.  VxWorks must then wait for Solaris 2.6 to time
>out before proceeding with its connection.  That is the cause for the delay.
>Sun Microsystems probably fixed TCP/IP in version 2.6 of Solaris.
>
>The device /dev/tcp has a "quality" modifiable by /usr/sbin/ndd called
>tcp_time_wait_interval.  Solaris 2.5.1 doesn't seem to pay attention to
>this variable, if one changes it to a larger or smaller value then
>vxWorks/vxWorks.sym still load without interruption. 
>
>RESOLUTION:
>If you do not have root access to the solaris ftp server, then
>add this to your usrConfig.c. It increments the local port number
>so that vxWorks.sym will load more quickly.
>
>/* Right before the call to netLoadSymTbl() */
>#ifdef SOLARIS26FTPD /* increment the last used port number by one. */
>
>    #include "netinet/in.h"
>    #include "sockLib.h"
>    {
>    int mybsock;
>    struct sockaddr_in mybsockaddr;
>    mybsockaddr.sin_addr.s_addr = htonl(INADDR_ANY);
>    mybsockaddr.sin_port = 0;
>    mybsockaddr.sin_family = AF_INET;
>    mybsock = socket(AF_INET, SOCK_STREAM, 0);
>    bind (mybsock, (struct sockaddr *) &mybsockaddr, sizeof(mybsockaddr));
>    close(mybsock);
>    }
>#endif /* SOLARIS26 ftp server*/
>
>Note, this would also apply when using a vxworks ftp server to boot other
>vxworks targets. 
>
>If you do have root access to the solaris ftp server then
>decrease the value of tcp_time_wait_interval using /usr/sbin/ndd
>example usage:
>/usr/sbin/ndd -set /dev/tcp tcp_time_wait_interval 5000
>
>SPR / PATCH:
>
>KEYWORDS: Solaris 2.6  symbol table boot INCLUDE_NET_SYM_TBL
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System