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| author | Igor Mammedov <imammedo@redhat.com> | 2017-05-10 13:29:45 +0200 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2017-05-11 16:08:48 -0300 |
| commit | ea089eebbd80e61d3c3cd03741dd5d9535c551fc (patch) | |
| tree | f868c4e6bc6f311b8513aaf465da5f343f96d6db /include/sysemu/numa.h | |
| parent | d9c34f9c6c745f6a8123a872b33990ab564c614a (diff) | |
| download | qemu-ea089eebbd80e61d3c3cd03741dd5d9535c551fc.zip qemu-ea089eebbd80e61d3c3cd03741dd5d9535c551fc.tar.gz qemu-ea089eebbd80e61d3c3cd03741dd5d9535c551fc.tar.bz2 | |
numa: move source of default CPUs to NUMA node mapping into boards
Originally CPU threads were by default assigned in
round-robin fashion. However it was causing issues in
guest since CPU threads from the same socket/core could
be placed on different NUMA nodes.
Commit fb43b73b (pc: fix default VCPU to NUMA node mapping)
fixed it by grouping threads within a socket on the same node
introducing cpu_index_to_socket_id() callback and commit
20bb648d (spapr: Fix default NUMA node allocation for threads)
reused callback to fix similar issues for SPAPR machine
even though socket doesn't make much sense there.
As result QEMU ended up having 3 default distribution rules
used by 3 targets /virt-arm, spapr, pc/.
In effort of moving NUMA mapping for CPUs into possible_cpus,
generalize default mapping in numa.c by making boards decide
on default mapping and let them explicitly tell generic
numa code to which node a CPU thread belongs to by replacing
cpu_index_to_socket_id() with @cpu_index_to_instance_props()
which provides default node_id assigned by board to specified
cpu_index.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1494415802-227633-2-git-send-email-imammedo@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include/sysemu/numa.h')
| -rw-r--r-- | include/sysemu/numa.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/sysemu/numa.h b/include/sysemu/numa.h index 70e5621..027830c 100644 --- a/include/sysemu/numa.h +++ b/include/sysemu/numa.h @@ -26,7 +26,7 @@ struct node_info { }; extern NodeInfo numa_info[MAX_NODES]; -void parse_numa_opts(MachineClass *mc); +void parse_numa_opts(MachineState *ms); void numa_post_machine_init(void); void query_numa_node_mem(uint64_t node_mem[]); extern QemuOptsList qemu_numa_opts; |