[libvirt] [PATCHv4 2/4] nodeinfo: Fix gathering of nodeinfo data structure

[Michal Privoznik]

On 11.07.2012 11:47, Peter Krempa wrote:
> This patch changes the way data to fill the nodeinfo structure are
> gathered. We've gathere the test data by iterating processors an sockets
> separately from nodes. The reported data was based solely on information
> about core id. Problems arise when eg cores in mulit-processor machines
> don't have same id's on both processors or maybe one physical processor
> contains more NUMA nodes.
> 
> This patch changes the approach how we detect processors and nodes. Now
> we start at enumerating nodes and for each node processors, sockets and
> threads are enumerated separately. This approach provides acurate data
> that comply to docs about the nodeinfo structure. This also enables to
> get rid of hacks: see commits 10d9038b744a69c8d4bd29c2e8c012a097481586,
> ac9dd4a676f21b5e3ca6dbe0526f2a6709072beb. (Those changes in nodeinfo.c
> are efectively reverted by this patch).
> 
> This patch also changes output of one of the tests, as the processor
> topology is now acquired more precisely.
> ---
> Changes to v3:
> - added ATTRIBUTE_NONNULL to arguments of virNodeParseNode()
> - added resetting of errno before calling readdir()
> - indented comment properly
> - edited comment placed before parsing info from /proc/cpuinfo to reflect current state better
> ---
>  src/nodeinfo.c                                     |  326 ++++++++++++--------
>  .../linux-nodeinfo-sysfs-test-3-cpu-x86-output.txt |    2 +-
>  2 files changed, 197 insertions(+), 131 deletions(-)

ACK

Michal