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Factor out the pretimeout handling code.

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We need to also call it if we're going to calculate alpha
after a normal circuit build.
This commit is contained in:
Mike Perry 2009-08-28 02:05:02 -07:00
parent b52bce91fc
commit 411b60325b
1 changed files with 20 additions and 15 deletions
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35
src/or/circuitbuild.c
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@ -301,8 +301,7 @@ circuit_build_times_calculate_timeout(circuit_build_times_t *cbt,
/* Pareto CDF */ /* Pareto CDF */
double double
circuit_build_times_cdf(circuit_build_times_t *cbt, circuit_build_times_cdf(circuit_build_times_t *cbt, double x)
double x)
{ {
double ret = 1.0-pow(cbt->Xm/x,cbt->alpha); double ret = 1.0-pow(cbt->Xm/x,cbt->alpha);
tor_assert(0 <= ret && ret <= 1.0); tor_assert(0 <= ret && ret <= 1.0);
@ -360,6 +359,23 @@ circuit_build_times_initial_alpha(circuit_build_times_t *cbt,
cbt->alpha = ln(1.0-quantile)/(ln(cbt->Xm)-ln(timeout)); cbt->alpha = ln(1.0-quantile)/(ln(cbt->Xm)-ln(timeout));
} }
static void
circuit_build_times_count_pretimeouts(circuit_build_times_t *cbt)
{
/* Store a timeout as a random position on this curve. */
if (cbt->pre_timeouts) {
cbt->Xm = circuit_build_times_min(cbt);
// Use current timeout to get an estimate on alpha
circuit_build_times_initial_alpha(cbt,
1.0-((double)cbt->pre_timeouts)/cbt->total_build_times,
get_options()->CircuitBuildTimeout*1000);
while (cbt->pre_timeouts-- != 0) {
circuit_build_times_add_timeout_worker(cbt);
}
cbt->pre_timeouts = 0;
}
}
/** /**
* Store a timeout as a synthetic value * Store a timeout as a synthetic value
*/ */
@ -376,19 +392,7 @@ circuit_build_times_add_timeout(circuit_build_times_t *cbt)
return; return;
} }
/* Store a timeout as a random position on this curve */ circuit_build_times_count_pretimeouts(cbt);
if (cbt->pre_timeouts) {
cbt->Xm = circuit_build_times_min(cbt);
// Use current timeout to get an estimate on alpha
circuit_build_times_initial_alpha(cbt,
1.0-((double)cbt->pre_timeouts)/cbt->total_build_times,
get_options()->CircuitBuildTimeout*1000);
while (cbt->pre_timeouts-- != 0) {
circuit_build_times_add_timeout_worker(cbt);
}
}
cbt->pre_timeouts = 0;
circuit_build_times_add_timeout_worker(cbt); circuit_build_times_add_timeout_worker(cbt);
} }
@ -405,6 +409,7 @@ circuit_build_times_set_timeout(circuit_build_times_t *cbt)
return; return;
} }
circuit_build_times_count_pretimeouts(cbt);
circuit_build_times_update_alpha(cbt); circuit_build_times_update_alpha(cbt);
timeout = circuit_build_times_calculate_timeout(cbt, timeout = circuit_build_times_calculate_timeout(cbt,
BUILDTIMEOUT_QUANTILE_CUTOFF); BUILDTIMEOUT_QUANTILE_CUTOFF);