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Refactor logging in loop to only log debug messages once

Logging entries in a loop to a file can be expensive for a large
number of objects (e.g. ports) in a loop. Rather than perform the
overhead of logging a debug entry for each line within the hosts
file, move the debug trace of the contents to after the loop to
bulk up the I/O operations.

Change-Id: I3ad7864eeb2f959549ed356a1e34fa18804395cc
Closes-Bug: #1414218
changes/84/149784/6
Billy Olsen 7 years ago
parent
commit
d93e0098eb
  1. 12
      neutron/agent/linux/dhcp.py

12
neutron/agent/linux/dhcp.py

@ -491,8 +491,6 @@ class Dnsmasq(DhcpLocalProcess):
if getattr(port, 'extra_dhcp_opts', False):
buf.write('%s,%s%s\n' %
(port.mac_address, 'set:', port.id))
LOG.debug('Adding %(mac)s : set:%(tag)s',
{"mac": port.mac_address, "tag": port.id})
continue
# don't write ip address which belongs to a dhcp disabled subnet.
@ -510,19 +508,13 @@ class Dnsmasq(DhcpLocalProcess):
buf.write('%s,%s,%s,%s%s\n' %
(port.mac_address, name, ip_address,
'set:', port.id))
LOG.debug('Adding %(mac)s : %(name)s : %(ip)s : '
'set:%(tag)s',
{"mac": port.mac_address, "name": name,
"ip": ip_address, "tag": port.id})
else:
buf.write('%s,%s,%s\n' %
(port.mac_address, name, ip_address))
LOG.debug('Adding %(mac)s : %(name)s : %(ip)s',
{"mac": port.mac_address, "name": name,
"ip": ip_address})
utils.replace_file(filename, buf.getvalue())
LOG.debug('Done building host file %s', filename)
LOG.debug('Done building host file %s with contents:\n%s', filename,
buf.getvalue())
return filename
def _read_hosts_file_leases(self, filename):

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