diff options
| author | He Chen <he.chen@linux.intel.com> | 2017-04-27 10:35:58 +0800 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2017-05-11 16:08:37 -0300 |
| commit | 0f203430dd88cc6270310956ace58aca639edb59 (patch) | |
| tree | b188d4e290c4e52f38db97ffc00e36f1c898435d /include/sysemu | |
| parent | 4ed3d478c63dc65a02eba774c35116618ea5ff10 (diff) | |
| download | qemu-0f203430dd88cc6270310956ace58aca639edb59.tar.gz | |
numa: Allow setting NUMA distance for different NUMA nodes
This patch is going to add SLIT table support in QEMU, and provides
additional option `dist` for command `-numa` to allow user set vNUMA
distance by QEMU command.
With this patch, when a user wants to create a guest that contains
several vNUMA nodes and also wants to set distance among those nodes,
the QEMU command would like:
```
-numa node,nodeid=0,cpus=0 \
-numa node,nodeid=1,cpus=1 \
-numa node,nodeid=2,cpus=2 \
-numa node,nodeid=3,cpus=3 \
-numa dist,src=0,dst=1,val=21 \
-numa dist,src=0,dst=2,val=31 \
-numa dist,src=0,dst=3,val=41 \
-numa dist,src=1,dst=2,val=21 \
-numa dist,src=1,dst=3,val=31 \
-numa dist,src=2,dst=3,val=21 \
```
Signed-off-by: He Chen <he.chen@linux.intel.com>
Message-Id: <1493260558-20728-1-git-send-email-he.chen@linux.intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include/sysemu')
| -rw-r--r-- | include/sysemu/numa.h | 2 | ||||
| -rw-r--r-- | include/sysemu/sysemu.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/sysemu/numa.h b/include/sysemu/numa.h index 8f09dcf918..0ea1bc086e 100644 --- a/include/sysemu/numa.h +++ b/include/sysemu/numa.h @@ -8,6 +8,7 @@ #include "hw/boards.h" extern int nb_numa_nodes; /* Number of NUMA nodes */ +extern bool have_numa_distance; struct numa_addr_range { ram_addr_t mem_start; @@ -21,6 +22,7 @@ typedef struct node_info { struct HostMemoryBackend *node_memdev; bool present; QLIST_HEAD(, numa_addr_range) addr; /* List to store address ranges */ + uint8_t distance[MAX_NODES]; } NodeInfo; extern NodeInfo numa_info[MAX_NODES]; diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h index 15656b7c36..be9e22c955 100644 --- a/include/sysemu/sysemu.h +++ b/include/sysemu/sysemu.h @@ -166,6 +166,10 @@ extern int mem_prealloc; #define MAX_NODES 128 #define NUMA_NODE_UNASSIGNED MAX_NODES +#define NUMA_DISTANCE_MIN 10 +#define NUMA_DISTANCE_DEFAULT 20 +#define NUMA_DISTANCE_MAX 254 +#define NUMA_DISTANCE_UNREACHABLE 255 #define MAX_OPTION_ROMS 16 typedef struct QEMUOptionRom { |