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Code Issues Releases Activity

Wait now uses a Fibonacci backoff rather than exponential.

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This commit is contained in:
David Steele
2015-07-11 19:07:28 -04:00
parent b777525f62
commit ea7914d980
1 changed files with 12 additions and 4 deletions
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16
lib/BackRest/Utility.pm
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@@ -633,15 +633,23 @@ sub waitMore
# Capture the end time
$$oWait{time_end} = gettimeofday();
# Calculate the new sleep time
$$oWait{sleep} = $$oWait{sleep} * 2 < $$oWait{wait_time} - ($$oWait{time_end} - $$oWait{time_begin}) ?
$$oWait{sleep} * 2 : ($$oWait{wait_time} - ($$oWait{time_end} - $$oWait{time_begin})) + .001;
# Exit if wait time has expired
if ((gettimeofday() - $$oWait{time_begin}) < $$oWait{wait_time})
{
return true;
}
# Else calculate the new sleep time
my $fSleepNext = $$oWait{sleep} + (defined($$oWait{sleep_prev}) ? $$oWait{sleep_prev} : 0);
if ($fSleepNext > $$oWait{wait_time} - ($$oWait{time_end} - $$oWait{time_begin}))
{
$fSleepNext = ($$oWait{wait_time} - ($$oWait{time_end} - $$oWait{time_begin})) + .001
}
$$oWait{sleep_prev} = $$oWait{sleep};
$$oWait{sleep} = $fSleepNext;
return false;
}