This patch modifies the increase_reservation and populate_physmap
hypercalls used to allocate memory to a domain. With numa support
enabled we balance the allocation by using the domain's vcpu placement
as a method of distributing the pages locally to the physical cpu the
vcpus will run upon.
--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253 T/L: 678-9253
ryanh@xxxxxxxxxx
diffstat output:
memory.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+)
Signed-off-by: Ryan Harper <ryanh@xxxxxxxxxx>
Signed-off-by: Ryan Grimm <grimm@xxxxxxxxxx>
---
# HG changeset patch
# User Ryan Harper <ryanh@xxxxxxxxxx>
# Node ID eda82207d4bf72df7acd43bfb937fcc39313bd0d
# Parent e258ba216530fc45a74da2383d07e60f97974bdc
This patch modifies the increase_reservation and populate_physmap
hypercalls used to allocate memory to a domain. With numa support
enabled we balance the allocation by using the domain's vcpu placement
as a method of distributing the pages locally to the physical cpu the
vcpus will run upon.
Signed-off-by: Ryan Harper <ryanh@xxxxxxxxxx>
Signed-off-by: Ryan Grimm <grimm@xxxxxxxxxx
diff -r e258ba216530 -r eda82207d4bf xen/common/memory.c
--- a/xen/common/memory.c Mon May 1 21:40:13 2006
+++ b/xen/common/memory.c Mon May 1 21:42:00 2006
@@ -40,6 +40,14 @@
struct page_info *page;
unsigned long i, mfn;
+#ifdef CONFIG_NUMA
+ int max_vcpu_id = 0;
+ struct vcpu *v;
+
+ for_each_vcpu (d, v)
+ if ( v->vcpu_id > max_vcpu_id )
+ max_vcpu_id = v->vcpu_id;
+#endif
if ( !guest_handle_is_null(extent_list) &&
!guest_handle_okay(extent_list, nr_extents) )
return 0;
@@ -56,8 +64,16 @@
return i;
}
+#ifdef CONFIG_NUMA
+ /* spread each allocation across the total number of
+ * vcpus allocated to this domain */
+ if ( unlikely((page = __alloc_domheap_pages( d,
+ (d->vcpu[i % (max_vcpu_id+1)])->processor,
+ extent_order, flags )) == NULL) )
+#else
if ( unlikely((page = alloc_domheap_pages(
d, extent_order, flags)) == NULL) )
+#endif
{
DPRINTK("Could not allocate order=%d extent: "
"id=%d flags=%x (%ld of %d)\n",
@@ -89,6 +105,14 @@
struct page_info *page;
unsigned long i, j, gpfn, mfn;
+#ifdef CONFIG_NUMA
+ int max_vcpu_id = 0;
+ struct vcpu *v;
+
+ for_each_vcpu (d, v)
+ if ( v->vcpu_id > max_vcpu_id )
+ max_vcpu_id = v->vcpu_id;
+#endif
if ( !guest_handle_okay(extent_list, nr_extents) )
return 0;
@@ -107,8 +131,16 @@
if ( unlikely(__copy_from_guest_offset(&gpfn, extent_list, i, 1)) )
goto out;
+#ifdef CONFIG_NUMA
+ /* spread each allocation across the total number of
+ * vcpus allocated to this domain */
+ if ( unlikely((page = __alloc_domheap_pages( d,
+ (d->vcpu[i % (max_vcpu_id+1)])->processor,
+ extent_order, flags )) == NULL) )
+#else
if ( unlikely((page = alloc_domheap_pages(
d, extent_order, flags)) == NULL) )
+#endif
{
DPRINTK("Could not allocate order=%d extent: "
"id=%d flags=%x (%ld of %d)\n",
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