The memory policy setting format is like:
policy={default|membind|interleave|preferred}[,relative=true],host-nodes=N-N
And we are adding this setting as a suboption of "-numa mem,",
the memory policy then can be set like following:
-numa node,nodeid=0,cpus=0 \
-numa node,nodeid=1,cpus=1 \
-numa mem,nodeid=0,size=1G,policy=membind,host-nodes=0-1 \
-numa mem,nodeid=1,size=1G,policy=interleave,relative=true,host-nodes=1
Signed-off-by: Wanlong Gao <gaowanl...@cn.fujitsu.com>
---
include/sysemu/sysemu.h | 3 +++
numa.c | 18 ++++++++++++++++++
qapi-schema.json | 33 +++++++++++++++++++++++++++++++--
vl.c | 3 +++
4 files changed, 55 insertions(+), 2 deletions(-)
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 12529a1..7495e01 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -134,6 +134,9 @@ extern int nb_numa_mem_nodes;
typedef struct node_info {
uint64_t node_mem;
DECLARE_BITMAP(node_cpu, MAX_CPUMASK_BITS);
+ DECLARE_BITMAP(host_mem, MAX_NODES);
+ NumaNodePolicy policy;
+ bool relative;
} NodeInfo;
extern NodeInfo numa_info[MAX_NODES];
void set_numa_nodes(void);
diff --git a/numa.c b/numa.c
index c676c5e..da4dbbd 100644
--- a/numa.c
+++ b/numa.c
@@ -78,6 +78,7 @@ static int numa_mem_parse(NumaMemOptions *opts)
{
uint16_t nodenr;
uint64_t mem_size;
+ uint16List *nodes;
if (opts->has_nodeid) {
nodenr = opts->nodeid;
@@ -96,6 +97,23 @@ static int numa_mem_parse(NumaMemOptions *opts)
numa_info[nodenr].node_mem = mem_size;
}
+ if (opts->has_policy) {
+ numa_info[nodenr].policy = opts->policy;
+ }
+
+ if (opts->has_relative) {
+ numa_info[nodenr].relative = opts->relative;
+ }
+
+ for (nodes = opts->host_nodes; nodes; nodes = nodes->next) {
+ if (nodes->value > MAX_NODES) {
+ fprintf(stderr, "qemu: node number %" PRIu16 " is bigger than
%d\n",
+ nodes->value, MAX_NODES);
+ continue;
+ }
+ bitmap_set(numa_info[nodenr].host_mem, nodes->value, 1);
+ }
+
return 0;
}
diff --git a/qapi-schema.json b/qapi-schema.json
index 950d0f5..dbe7088 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3871,6 +3871,26 @@
'*mem': 'str' }}
##
+# @NumaNodePolicy
+#
+# NUMA node policy types
+#
+# @default: restore default policy, remove any nondefault policy
+#
+# @preferred: set the preferred node for allocation
+#
+# @membind: a strict policy that restricts memory allocation to the
+# nodes specified
+#
+# @interleave: the page allocations is interleaved across the set
+# of nodes specified
+#
+# Since 1.7
+##
+{ 'enum': 'NumaNodePolicy',
+ 'data': [ 'default', 'preferred', 'membind', 'interleave' ] }
+
+##
# @NumaMemOptions
#
# Set memory information of guest NUMA node. (for OptsVisitor)
@@ -3879,9 +3899,18 @@
#
# @size: #optional memory size of this node
#
+# @policy: #optional memory policy of this node
+#
+# @relative: #optional if the nodes specified are relative
+#
+# @host-nodes: #optional host nodes for its memory policy
+#
# Since 1.7
##
{ 'type': 'NumaMemOptions',
'data': {
- '*nodeid': 'uint16',
- '*size': 'size' }}
+ '*nodeid': 'uint16',
+ '*size': 'size',
+ '*policy': 'NumaNodePolicy',
+ '*relative': 'bool',
+ '*host-nodes': ['uint16'] }}
diff --git a/vl.c b/vl.c
index 341c096..d09b6ef 100644
--- a/vl.c
+++ b/vl.c
@@ -2814,6 +2814,9 @@ int main(int argc, char **argv, char **envp)
for (i = 0; i < MAX_NODES; i++) {
numa_info[i].node_mem = 0;
bitmap_zero(numa_info[i].node_cpu, MAX_CPUMASK_BITS);
+ bitmap_zero(numa_info[i].host_mem, MAX_NODES);
+ numa_info[i].policy = NUMA_NODE_POLICY_DEFAULT;
+ numa_info[i].relative = false;
}
nb_numa_nodes = 0;
--
1.8.4.99.gd2dbd39
