[Info-vax] Apache + mod_php performance

[Arne Vajhøj]

On 10/7/2024 12:47 PM, Mark Berryman wrote:
> It is most definitely possible as that is precisely what the auxiliary 
> server in TCPIP Services does.  It listens for a connection, then 
> creates a process to handle it.  See the description of TCPIP$C_AUXS in 
> the TCPIP Services programming documentation.

SYS$COMMON:[SYSHLP.EXAMPLES.TCPIP]TCPIP$TCP_SERVER_SOCK_AUXS.C has:

     /*
      * create socket
      */

     if ( (sockfd = socket(TCPIP$C_AUXS, SOCK_STREAM, 0)) < 0 )
    {
    perror( "Failed to create socket" );
    exit( EXIT_FAILURE );
    }

but the equivalent 
SYS$COMMON:[SYSHLP.EXAMPLES.TCPIP]TCPIP$TCP_SERVER_QIO_AUXS.C
gives some hints about what it is doing:

     struct sockchar conn_sockchar;  /* connect socket char buffer     */
...
     $DESCRIPTOR( inet_device,    /* string descriptor with logical   */
        "SYS$NET:"    ); /* name of internet pseudodevice    */
...
     /*
      * init connection socket characteristics buffer
      */

     conn_sockchar.prot = TCPIP$C_TCP;
     conn_sockchar.type = TCPIP$C_STREAM;
     conn_sockchar.af   = TCPIP$C_AUXS;
...
     /*
      * assign device socket
      */

     status = sys$assign( &inet_device,     /* device name      */
           &conn_channel,     /* i/o channel       */
           0,          /* access mode          */
           0        /* not used             */
              );

     if ( !(status & STS$M_SUCCESS) )
    {
    printf( "Failed to assign i/o channel to TCPIP device\n" );
    exit( status );
    }
...
     /*
      * create connection socket
      */

     status = sys$qiow( EFN$C_ENF,           /* event flag 
     */
                        conn_channel,        /* i/o channel 
     */
                        IO$_SETMODE,         /* i/o function code 
     */
                        &iosb,               /* i/o status block 
     */
                        0,                   /* ast service routine 
     */
                        0,                   /* ast parameter 
     */
                        &conn_sockchar,      /* p1 - socket char buffer 
     */
                        0,                   /* p2 
     */
                        0,                   /* p3 
     */
                        0,                   /* p4 
     */
                        0,                   /* p5 
     */
                        0                    /* p6 
     */
                      );

     if ( status & STS$M_SUCCESS )
         status = iosb.status;

     if ( !(status & STS$M_SUCCESS) )
         {
         printf( "Failed to create socket\n" );
         exit( status );
         }

But it is not clear (at least not to me) whether:
- the original TCP/IP device was made shareable and SYS$NET just points 
to it
or:
- the original TCP/IP device is connected to a new pseudodevice that
   SYS$NET points to

The first seems by far the simplest, but the comment indicate
the second.

Arne