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c588ba982e
"is" compares for "points to the same object", which for strings is the same as comparing the byte sequence itself as Python hashes each strings to only stores a unique copy of each string. > examples/nodestats.py:86:43: F632 use ==/!= to compare constant literals (str, bytes, int, float, tuple) > examples/nodestats.py:91:12: F632 use ==/!= to compare constant literals (str, bytes, int, float, tuple) > examples/nodestats.py:94:40: F632 use ==/!= to compare constant literals (str, bytes, int, float, tuple) Use "==" and "!=" for string comparsion. Signed-off-by: Philipp Hahn <hahn@univention.de>
88 lines
2.6 KiB
Python
Executable File
88 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env python3
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# Print some host NUMA node statistics
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#
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# Authors:
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# Michal Privoznik <mprivozn@redhat.com>
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import libvirt
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import sys
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from xml.dom import minidom
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import libxml2
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def xpath_eval(ctxt, path):
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res = ctxt.xpathEval(path)
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if res is None or len(res) == 0:
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value = None
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else:
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value = res[0].content
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return value
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try:
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conn = libvirt.openReadOnly(None)
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except libvirt.libvirtError:
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print("Failed to connect to the hypervisor")
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sys.exit(1)
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try:
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capsXML = conn.getCapabilities()
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except libvirt.libvirtError:
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print("Failed to request capabilities")
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sys.exit(1)
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caps = minidom.parseString(capsXML)
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cells = caps.getElementsByTagName("cells")[0]
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nodesIDs = [ int(proc.getAttribute("id"))
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for proc in cells.getElementsByTagName("cell") ]
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nodesMem = [ conn.getMemoryStats(int(proc))
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for proc in nodesIDs]
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doms = conn.listAllDomains(libvirt.VIR_CONNECT_LIST_DOMAINS_ACTIVE)
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domsStrict = [ proc
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for proc in doms
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if proc.numaParameters()["numa_mode"] == libvirt.VIR_DOMAIN_NUMATUNE_MEM_STRICT ]
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domsStrictCfg = {}
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for dom in domsStrict:
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xmlStr = dom.XMLDesc()
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doc = libxml2.parseDoc(xmlStr)
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ctxt = doc.xpathNewContext()
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domsStrictCfg[dom] = {}
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pin = ctxt.xpathEval("string(/domain/numatune/memory/@nodeset)")
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memsize = ctxt.xpathEval("string(/domain/memory)")
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domsStrictCfg[dom]["memory"] = {"size": int(memsize), "pin": pin}
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for memnode in ctxt.xpathEval("/domain/numatune/memnode"):
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ctxt.setContextNode(memnode)
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cellid = xpath_eval(ctxt, "@cellid")
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nodeset = xpath_eval(ctxt, "@nodeset")
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nodesize = xpath_eval(ctxt, "/domain/cpu/numa/cell[@id='%s']/@memory" % cellid)
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domsStrictCfg[dom][cellid] = {"size": int(nodesize), "pin": nodeset}
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print("NUMA stats")
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print("NUMA nodes:\t" + "\t".join(str(node) for node in nodesIDs))
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print("MemTotal:\t" + "\t".join(str(i.get("total") // 1024) for i in nodesMem))
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print("MemFree:\t" + "\t".join(str(i.get("free") // 1024) for i in nodesMem))
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for dom, v in domsStrictCfg.items():
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print("Domain '%s':\t" % dom.name())
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toPrint = "\tOverall memory: %d MiB" % (v["memory"]["size"] // 1024)
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if v["memory"]["pin"] is not None and v["memory"]["pin"] != "":
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toPrint = toPrint + " nodes %s" % v["memory"]["pin"]
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print(toPrint)
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for k, node in sorted(v.items()):
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if k == "memory":
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continue
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toPrint = "\tNode %s:\t%d MiB" % (k, node["size"] // 1024)
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if node["pin"] is not None and node["pin"] == "":
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toPrint = toPrint + " nodes %s" % node["pin"]
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print(toPrint)
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