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/* -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 99; -*- */
/* vim: set ts=4 sw=4 et tw=99: */
// code based on gcc - Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
#include <algorithm>
/* Heuristic to set a default for GGC_MIN_EXPAND. */
int ggc_min_expand_heuristic(unsigned int mem_limit)
{
double min_expand = mem_limit;
/* The heuristic is a percentage equal to 30% + 70%*(RAM/1GB), yielding
a lower bound of 30% and an upper bound of 100% (when RAM >= 1GB). */
min_expand /= 1024;
min_expand *= 70;
min_expand = std::min(min_expand, 70.);
min_expand += 30;
return int(min_expand);
}
/* Heuristic to set a default for GGC_MIN_HEAPSIZE. */
unsigned int ggc_min_heapsize_heuristic(unsigned int mem_limit)
{
/* The heuristic is RAM/8, with a lower bound of 4M and an upper
bound of 128M (when RAM >= 1GB). */
mem_limit /= 8;
mem_limit = std::max(mem_limit, 4U);
mem_limit = std::min(mem_limit, 128U);
return mem_limit * 1024;
}
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