New weighted fair-share CPU scheduler w/ automatic SMP load balancing

Signed-off-by: Emmanuel Ackaouy <ack@xensource.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/tools/libxc/xc_csched.c b/tools/libxc/xc_csched.c
new file mode 100644
index 0000000000..18513ec179
--- /dev/null
+++ b/tools/libxc/xc_csched.c
@@ -0,0 +1,50 @@
+/****************************************************************************
+ * (C) 2006 - Emmanuel Ackaouy - XenSource Inc.
+ ****************************************************************************
+ *
+ *        File: xc_csched.c
+ *      Author: Emmanuel Ackaouy
+ *
+ * Description: XC Interface to the credit scheduler
+ *
+ */
+#include "xc_private.h"
+
+
+int
+xc_csched_domain_set(
+    int xc_handle,
+    uint32_t domid,
+    struct csched_domain *sdom)
+{
+    DECLARE_DOM0_OP;
+
+    op.cmd = DOM0_ADJUSTDOM;    
+    op.u.adjustdom.domain = (domid_t) domid;
+    op.u.adjustdom.sched_id = SCHED_CREDIT;
+    op.u.adjustdom.direction = SCHED_INFO_PUT;
+    op.u.adjustdom.u.credit = *sdom;
+
+    return do_dom0_op(xc_handle, &op);
+}
+
+int
+xc_csched_domain_get(
+    int xc_handle,
+    uint32_t domid,
+    struct csched_domain *sdom)
+{
+    DECLARE_DOM0_OP;
+    int err;
+
+    op.cmd = DOM0_ADJUSTDOM;    
+    op.u.adjustdom.domain = (domid_t) domid;
+    op.u.adjustdom.sched_id = SCHED_CREDIT;
+    op.u.adjustdom.direction = SCHED_INFO_GET;
+
+    err = do_dom0_op(xc_handle, &op);
+    if ( err == 0 )
+        *sdom = op.u.adjustdom.u.credit;
+
+    return err;
+}