WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-Devel] [PATCH 1/1] Add .adjust_global callback

To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-Devel] [PATCH 1/1] Add .adjust_global callback
From: "Kathy Hadley" <Kathy.Hadley@xxxxxxxxxxxxxxx>
Date: Fri, 16 Apr 2010 10:14:22 -0400
Cc: Keir.Fraser@xxxxxxxxxx
Delivery-date: Mon, 19 Apr 2010 07:20:32 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcrdbxyUd0fO1HqETXaw6gDS5c4y7A==
Thread-topic: [Xen-Devel] [PATCH 1/1] Add .adjust_global callback

This patch adds an .adjust_global scheduler callback function, which allows adjusting the global scheduler parameters (rather than just one domain’s parameters).  This patch supports the addition of an ARINC 653 scheduler (which will be submitted in a subsequent patch), and was suggested by George Dunlap and Keir Fraser in response to an earlier patch (ref: [Xen-devel] [PATCH 1/1] Xen ARINC 653 scheduler).

 

Thanks and regards,

 

 

cid:image001.jpg@01CAD7E0.50E45D70

Kathy Hadley
DornerWorks, Ltd.
Embedded Systems Engineering

3445 Lake Eastbrook Blvd SE
Grand Rapids, MI  49546

Direct: 616.389.6127

Tel:      616.245.8369

Fax:     616.245.8372

 

Kathy.Hadley@xxxxxxxxxxxxxxx

www.DornerWorks.com

cid:image002.jpg@01CAD7E0.50E45D70

Honored as one of the 2010 “Michigan 50 Companies to Watch”

 

diff -rupN a/xen/common/domctl.c b/xen/common/domctl.c

--- a/xen/common/domctl.c        2010-04-07 12:12:06.000000000 -0400

+++ b/xen/common/domctl.c     2010-04-14 10:57:11.262796000 -0400

@@ -592,22 +592,35 @@ long do_domctl(XEN_GUEST_HANDLE(xen_domc

 

     case XEN_DOMCTL_scheduler_op:

     {

-        struct domain *d;

-

-        ret = -ESRCH;

-        if ( (d = rcu_lock_domain_by_id(op->domain)) == NULL )

-            break;

+        if ( (op->u.scheduler_op.cmd == XEN_DOMCTL_SCHEDOP_put_global_info)

+          || (op->u.scheduler_op.cmd == XEN_DOMCTL_SCHEDOP_get_global_info) )

+        {

+            ret = sched_adjust_global(&op->u.scheduler_op);

+            if (op->u.scheduler_op.cmd == XEN_DOMCTL_SCHEDOP_get_global_info)

+            {

+                if ( copy_to_guest(u_domctl, op, 1) )

+                    ret = -EFAULT;

+            }

+        }

+        else

+        {

+            struct domain *d;

 

-        ret = xsm_scheduler(d);

-        if ( ret )

-            goto scheduler_op_out;

+            ret = -ESRCH;

+            if ( (d = rcu_lock_domain_by_id(op->domain)) == NULL )

+                break;

 

-        ret = sched_adjust(d, &op->u.scheduler_op);

-        if ( copy_to_guest(u_domctl, op, 1) )

-            ret = -EFAULT;

+            ret = xsm_scheduler(d);

+            if ( ret )

+                goto scheduler_op_out;

+

+            ret = sched_adjust(d, &op->u.scheduler_op);

+            if ( copy_to_guest(u_domctl, op, 1) )

+                ret = -EFAULT;

 

-    scheduler_op_out:

-        rcu_unlock_domain(d);

+        scheduler_op_out:

+            rcu_unlock_domain(d);

+        }

     }

     break;

 

diff -rupN a/xen/common/sched_credit.c b/xen/common/sched_credit.c

--- a/xen/common/sched_credit.c           2010-04-07 12:12:06.000000000 -0400

+++ b/xen/common/sched_credit.c        2010-04-13 17:30:40.710992000 -0400

@@ -1404,6 +1404,7 @@ const struct scheduler sched_credit_def

     .wake           = csched_vcpu_wake,

 

     .adjust         = csched_dom_cntl,

+    .adjust_global  = NULL,

 

     .pick_cpu       = csched_cpu_pick,

     .do_schedule    = csched_schedule,

diff -rupN a/xen/common/sched_sedf.c b/xen/common/sched_sedf.c

--- a/xen/common/sched_sedf.c 2010-04-07 12:12:06.000000000 -0400

+++ b/xen/common/sched_sedf.c          2010-04-13 17:30:40.710992000 -0400

@@ -1473,6 +1473,7 @@ const struct scheduler sched_sedf_def =

     .sleep          = sedf_sleep,

     .wake           = sedf_wake,

     .adjust         = sedf_adjust,

+    .adjust_global  = NULL,

 };

 

 /*

diff -rupN a/xen/common/schedule.c b/xen/common/schedule.c

--- a/xen/common/schedule.c     2010-04-07 12:12:06.000000000 -0400

+++ b/xen/common/schedule.c  2010-04-14 10:57:11.262796000 -0400

@@ -804,6 +804,21 @@ long sched_adjust(struct domain *d, stru

     return ret;

 }

 

+/* Adjust scheduling parameters globally */

+long sched_adjust_global(struct xen_domctl_scheduler_op *op)

+{

+    long ret;

+

+    if ( (op->sched_id != ops.sched_id)

+      || ( (op->cmd != XEN_DOMCTL_SCHEDOP_put_global_info)

+        && (op->cmd != XEN_DOMCTL_SCHEDOP_get_global_info) ) )

+        return -EINVAL;

+

+    ret = SCHED_OP(adjust_global, op);

+

+    return ret;

+}

+

 static void vcpu_periodic_timer_work(struct vcpu *v)

 {

     s_time_t now = NOW();

diff -rupN a/xen/include/public/domctl.h b/xen/include/public/domctl.h

--- a/xen/include/public/domctl.h 2010-04-07 12:12:06.000000000 -0400

+++ b/xen/include/public/domctl.h         2010-04-14 10:57:11.262796000 -0400

@@ -306,6 +306,8 @@ DEFINE_XEN_GUEST_HANDLE(xen_domctl_max_v

 /* Set or get info? */

 #define XEN_DOMCTL_SCHEDOP_putinfo 0

 #define XEN_DOMCTL_SCHEDOP_getinfo 1

+#define XEN_DOMCTL_SCHEDOP_put_global_info 2

+#define XEN_DOMCTL_SCHEDOP_get_global_info 3

 struct xen_domctl_scheduler_op {

     uint32_t sched_id;  /* XEN_SCHEDULER_* */

     uint32_t cmd;       /* XEN_DOMCTL_SCHEDOP_* */

diff -rupN a/xen/include/xen/sched.h b/xen/include/xen/sched.h

--- a/xen/include/xen/sched.h      2010-04-07 12:12:06.000000000 -0400

+++ b/xen/include/xen/sched.h  2010-04-13 17:30:40.710992000 -0400

@@ -472,6 +472,7 @@ void sched_destroy_vcpu(struct vcpu *v);

 int  sched_init_domain(struct domain *d);

 void sched_destroy_domain(struct domain *d);

 long sched_adjust(struct domain *, struct xen_domctl_scheduler_op *);

+long sched_adjust_global(struct xen_domctl_scheduler_op *);

 int  sched_id(void);

 void sched_tick_suspend(void);

 void sched_tick_resume(void);

diff -rupN a/xen/include/xen/sched-if.h b/xen/include/xen/sched-if.h

--- a/xen/include/xen/sched-if.h   2010-04-07 12:12:06.000000000 -0400

+++ b/xen/include/xen/sched-if.h           2010-04-13 17:30:40.710992000 -0400

@@ -76,6 +76,7 @@ struct scheduler {

     int          (*pick_cpu)       (struct vcpu *);

     int          (*adjust)         (struct domain *,

                                     struct xen_domctl_scheduler_op *);

+    int          (*adjust_global)  (struct xen_domctl_scheduler_op *);

     void         (*dump_settings)  (void);

     void         (*dump_cpu_state) (int);

 

 

 

 

 

Attachment: dornerworks-xen-4.0.0-add-adjust_global-scheduler-callback.patch
Description: dornerworks-xen-4.0.0-add-adjust_global-scheduler-callback.patch

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
<Prev in Thread] Current Thread [Next in Thread>