ARINC653

["Simon Martin" <smartin@milliways.cl>]

[-- Attachment #1.1: Type: text/plain, Size: 1317 bytes --]

Hi Robbie,

Nate said that I should contact you if I was having problems with the 
scheduler, and unfortunately I have.

As far as I can see I have created a cpupool with 1 CPU running the 
arinc653 scheduler. Here the output from xl.

root@smartin-xen:~# xl cpupool-list
Name               CPUs   Sched     Active   Domain count
Pool-0               3    credit       y          1
pv400                1  arinc653       y          1

However the domU I load into the pv400 cpupool is never scheduled. I 
found a few mails talking about this, and it looks like I need to run a 
program on dom0 to configure the scheduler. I wrote the program and as 
far as I can see it should work, however whatever I do it fails. I tried 
to put a few printk statements in the corresponding arinc653_sched_set 
but I don't see any output in the xl dmesg, or domU log either.

I attach the code I wrote to configure the scheduler. It accepts one 
parameter, the UUID of the dom_handle I need to specify. The mail I 
found wasn't too clear so I test this using the dom0 UUID 
(00000000-0000-0000-0000-000000000000) and with the domU UUID as well. 
Both fail the do_sysctl call in xc_sched_arinc653_schedule_set 
(xc_arinc653.c line 51).

Can you give me some idea of what I'm doing wrong here?

Regards.

[-- Attachment #1.2: Type: text/html, Size: 2624 bytes --]

[-- Attachment #2: arinc653.c --]
[-- Type: text/plain, Size: 3486 bytes --]

/* ********************************************************************
   * Project   :
   * Author    : smartin
   ********************************************************************

    Modifications:
    0.01 29/11/2013 Initial version.
*/

/*---------------------------------------------------------------------
  -- macros (preamble)
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- standard includes
  ---------------------------------------------------------------------*/
#include <stdio.h>
#include <xenctrl.h>
#include <uuid/uuid.h>

/*---------------------------------------------------------------------
  -- project includes (import)
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- project includes (export)
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- macros (postamble)
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- data types
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- function prototypes
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- global variables
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- local variables
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- private functions
  ---------------------------------------------------------------------*/

/*---------------------------------------------------------------------
  -- public functions
  ---------------------------------------------------------------------*/

int main(int argc, char *argv[], char *envp[])
{
    // check for parameters
    if (argc < 2)
    {
        printf("%s <dom uuid>\n", argv[0]);
        return -1;
    }
    printf("scheduling %s\n", argv[1]);

    // get the xen control interface
    xc_interface *xci = xc_interface_open(NULL, NULL, 0);
    if (!xci)
    {
        printf("error opening xen control interface\n");
        return -1;
    }

    /* initialize major frame and number of minor frames */
    struct xen_sysctl_arinc653_schedule sched = {0};
    sched.major_frame = 0;
    sched.num_sched_entries = 1;

    // initialise frames
    int i;
    for (i = 0; i < sched.num_sched_entries; ++i)
    {
        /* identify domain by UUID */
        if (uuid_parse(argv[1], sched.sched_entries[i].dom_handle))
        {
            printf("error parsing uuid %s\n", argv[1]);
            return -1;
        }

        /* must be 0 */
        sched.sched_entries[i].vcpu_id = 0;

        /* runtime in ms */
        sched.sched_entries[i].runtime = 1;

        /* updated major frame time */
        sched.major_frame += sched.sched_entries[i].runtime;
    }

    i = xc_sched_arinc653_schedule_set(xci, &sched);
    if (i)
    {
        printf("error %i setting scheduler data\n", i);
        return -1;
    }

    return 0;
}

[-- Attachment #3: Type: text/plain, Size: 126 bytes --]

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel