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sync: Only parallelize gc for git >= 1.7.2
This minimum version is required for the -c argument to set config on the command line. Without this option, git by default uses as many threads per invocation as there are CPUs, so we cannot safely parallelize without hosing a system. Change-Id: I8fd313dd84917658162b5134b2d9aa34a96f2772
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@ -44,7 +44,7 @@ try:
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except ImportError:
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except ImportError:
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multiprocessing = None
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multiprocessing = None
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from git_command import GIT
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from git_command import GIT, git_require
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from git_refs import R_HEADS, HEAD
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from git_refs import R_HEADS, HEAD
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from main import WrapperModule
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from main import WrapperModule
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from project import Project
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from project import Project
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@ -310,7 +310,8 @@ later is required to fix a server side protocol bug.
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return fetched
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return fetched
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def _GCProjects(self, projects):
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def _GCProjects(self, projects):
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if multiprocessing:
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has_dash_c = git_require((1, 7, 2))
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if multiprocessing and has_dash_c:
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cpu_count = multiprocessing.cpu_count()
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cpu_count = multiprocessing.cpu_count()
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else:
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else:
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cpu_count = 1
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cpu_count = 1
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