/* static */
void UIApplianceEditorWidget::initSystemSettings()
{
if (m_minGuestRAM == -1)
{
/* We need some global defaults from the current VirtualBox
installation */
CSystemProperties sp = vboxGlobal().virtualBox().GetSystemProperties();
m_minGuestRAM = sp.GetMinGuestRAM();
m_maxGuestRAM = sp.GetMaxGuestRAM();
m_minGuestCPUCount = sp.GetMinGuestCPUCount();
m_maxGuestCPUCount = sp.GetMaxGuestCPUCount();
}
}
void VBoxGuestRAMSlider::init()
{
ulong fullSize = vboxGlobal().host().GetMemorySize();
CSystemProperties sys = vboxGlobal().virtualBox().GetSystemProperties();
mMinRAM = sys.GetMinGuestRAM();
mMaxRAM = RT_MIN (RT_ALIGN (fullSize, _1G / _1M), sys.GetMaxGuestRAM());
/* Come up with some nice round percent boundaries relative to
* the system memory. A max of 75% on a 256GB config is ridiculous,
* even on an 8GB rig reserving 2GB for the OS is way to conservative.
* The max numbers can be estimated using the following program:
*
* double calcMaxPct(uint64_t cbRam)
* {
* double cbRamOverhead = cbRam * 0.0390625; // 160 bytes per page.
* double cbRamForTheOS = RT_MAX(RT_MIN(_512M, cbRam * 0.25), _64M);
* double OSPct = (cbRamOverhead + cbRamForTheOS) * 100.0 / cbRam;
* double MaxPct = 100 - OSPct;
* return MaxPct;
* }
*
* int main()
* {
* uint64_t cbRam = _1G;
* for (; !(cbRam >> 33); cbRam += _1G)
* printf("%8lluGB %.1f%% %8lluKB\n", cbRam >> 30, calcMaxPct(cbRam),
* (uint64_t)(cbRam * calcMaxPct(cbRam) / 100.0) >> 20);
* for (; !(cbRam >> 51); cbRam <<= 1)
* printf("%8lluGB %.1f%% %8lluKB\n", cbRam >> 30, calcMaxPct(cbRam),
* (uint64_t)(cbRam * calcMaxPct(cbRam) / 100.0) >> 20);
* return 0;
* }
*
* Note. We might wanna put these calculations somewhere global later. */
/* System RAM amount test */
mMaxRAMAlw = (uint)(0.75 * fullSize);
mMaxRAMOpt = (uint)(0.50 * fullSize);
if (fullSize < 3072)
/* done */;
else if (fullSize < 4096) /* 3GB */
mMaxRAMAlw = (uint)(0.80 * fullSize);
else if (fullSize < 6144) /* 4-5GB */
{
mMaxRAMAlw = (uint)(0.84 * fullSize);
mMaxRAMOpt = (uint)(0.60 * fullSize);
}
else if (fullSize < 8192) /* 6-7GB */
{
mMaxRAMAlw = (uint)(0.88 * fullSize);
mMaxRAMOpt = (uint)(0.65 * fullSize);
}
else if (fullSize < 16384) /* 8-15GB */
{
mMaxRAMAlw = (uint)(0.90 * fullSize);
mMaxRAMOpt = (uint)(0.70 * fullSize);
}
else if (fullSize < 32768) /* 16-31GB */
{
mMaxRAMAlw = (uint)(0.93 * fullSize);
mMaxRAMOpt = (uint)(0.75 * fullSize);
}
else if (fullSize < 65536) /* 32-63GB */
{
mMaxRAMAlw = (uint)(0.94 * fullSize);
mMaxRAMOpt = (uint)(0.80 * fullSize);
}
else if (fullSize < 131072) /* 64-127GB */
{
mMaxRAMAlw = (uint)(0.95 * fullSize);
mMaxRAMOpt = (uint)(0.85 * fullSize);
}
else /* 128GB- */
{
mMaxRAMAlw = (uint)(0.96 * fullSize);
mMaxRAMOpt = (uint)(0.90 * fullSize);
}
/* Now check the calculated maximums are out of the range for the guest
* RAM. If so change it accordingly. */
mMaxRAMAlw = RT_MIN (mMaxRAMAlw, mMaxRAM);
mMaxRAMOpt = RT_MIN (mMaxRAMOpt, mMaxRAM);
setPageStep (calcPageStep (mMaxRAM));
setSingleStep (pageStep() / 4);
setTickInterval (pageStep());
/* Setup the scale so that ticks are at page step boundaries */
setMinimum ((mMinRAM / pageStep()) * pageStep());
setMaximum (mMaxRAM);
setSnappingEnabled (true);
setOptimalHint (mMinRAM, mMaxRAMOpt);
setWarningHint (mMaxRAMOpt, mMaxRAMAlw);
setErrorHint (mMaxRAMAlw, mMaxRAM);
}