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nodedev: Export NUMA node locality for PCI devices

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A PCI device can be associated with a specific NUMA node. Later, when
a guest is pinned to one NUMA node the PCI device can be assigned on
different NUMA node. This makes DMA transfers travel across nodes and
thus results in suboptimal performance. We should expose the NUMA node
locality for PCI devices so management applications can make better
decisions.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Michal Privoznik
2014-05-07 18:07:12 +02:00
parent a3173fef9d
commit 1c70277886
7 changed files with 76 additions and 0 deletions
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1
tests/nodedevschemadata/pci_1002_71c4.xml
View File

@@ -8,5 +8,6 @@
<function>0</function>
<product id='0x71c4'>M56GL [Mobility FireGL V5200]</product>
<vendor id='0x1002'>ATI Technologies Inc</vendor>
<numa node='1'/>
</capability>
</device>

1
tests/nodedevschemadata/pci_8086_10c9_sriov_pf.xml
View File

@@ -12,5 +12,6 @@
<address domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
<address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/>
</iommuGroup>
<numa node='0'/>
</capability>
</device>