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ovsdb-idlc: Make no-op writes to write-only columns cheaper.

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For 1000 tunnels with CFM enabled, this reduces CPU use from
about 36% to about 30%.

Bug #15171.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
This commit is contained in:
Ben Pfaff
2013-03-05 15:30:33 -08:00
parent c9e5dfbd18
commit fe19569ac5
4 changed files with 80 additions and 22 deletions
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11
python/ovs/db/types.py
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@@ -1,4 +1,4 @@
# Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
# Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
@@ -353,6 +353,15 @@ class BaseType(object):
else:
return "%(dst)s = %(src)s;" % args
def assign_c_value_casting_away_const(self, dst, src):
args = {'dst': dst, 'src': src}
if self.ref_table_name:
return ("%(dst)s = %(src)s->header_.uuid;") % args
elif self.type == StringType:
return "%(dst)s = CONST_CAST(char *, %(src)s);" % args
else:
return "%(dst)s = %(src)s;" % args
def initCDefault(self, var, is_optional):
if self.ref_table_name:
return "%s = NULL;" % var