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usertools: show hugepages on POWER systems

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The IBM PowerNV systems include NUMA nodes that don't have associated
CPUs or hugepage memory.  Here is an example on an IBM AC922 system:

$ lscpu
...
NUMA node0 CPU(s):   0-63
NUMA node8 CPU(s):   64-127
NUMA node252 CPU(s):
...

$ numastat -m
...
                          Node 0          Node 8        Node 252
                 --------------- --------------- ---------------
MemTotal               126763.19       130785.06            0.00
MemFree                119513.38       125294.44            0.00
MemUsed                  7249.81         5490.62            0.00
...
HugePages_Total             4.00         1734.00            0.00
HugePages_Free              0.00            4.00            0.00
HugePages_Surp              4.00         1730.00            0.00
...

Modify dpdk-hugepages.py to test for the ../hugepages directory before
attempting to parse the hugepage entries.

Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
This commit is contained in:
David Christensen 2020-12-02 12:57:56 -08:00 committed by Thomas Monjalon
parent c48d8c3164
commit 2204feccf2
1 changed files with 2 additions and 0 deletions
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usertools/dpdk-hugepages.py
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@ -70,6 +70,8 @@ def show_numa_pages():
for numa_path in glob.glob('/sys/devices/system/node/node*'):
node = numa_path[29:] # slice after /sys/devices/system/node/node
path = numa_path + '/hugepages'
if not os.path.exists(path):
continue
for hdir in os.listdir(path):
pages = get_hugepages(path + '/' + hdir)
if pages > 0: