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278 lines
10 KiB
C#
278 lines
10 KiB
C#
/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Globalization;
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using System.Text;
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using XenAdmin.Core;
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using XenAPI;
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namespace XenAdmin.Controls.Ballooning
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{
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public class VMMemoryControlsEdit : VMMemoryControlsBase
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{
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// Was ballooning on at the time when we entered the dialog?
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// (Like other settings on the dialog, it deliberately doesn't reflect later changes: see CA-34476).
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protected bool ballooning = true;
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// The maximum value allowed for memory for this VM
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private long maxMemAllowed = VM.DEFAULT_MEM_ALLOWED;
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protected bool firstPaint = true;
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public override List<VM> VMs
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{
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set
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{
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base.VMs = value;
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ballooning = vm0.has_ballooning;
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firstPaint = true;
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maxMemAllowed = CalcMaxMemAllowed();
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}
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}
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private long _static_min;
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protected long static_min
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{
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get
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{
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System.Diagnostics.Trace.Assert(ballooning || Program.RunInAutomatedTestMode); // would be better to edit the test XML file to have VMs and templates with ballooning
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return _static_min;
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}
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set
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{
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_static_min = value;
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}
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}
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// These properties should be abstract, but you can't have an abstract class as the
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// base class of a control, otherwise the control can't be edited in the Designer.
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[Browsable(false)]
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public virtual long dynamic_min
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{
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get { return 0; }
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}
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[Browsable(false)]
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public virtual long dynamic_max
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{
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get { return 0; }
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}
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[Browsable(false)]
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public virtual long static_max
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{
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get { return 0; }
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}
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// A bit hacky, but needed to fix CA-35710. The ballooning dialog has to call this before
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// closing, otherwise the settings on the spinners may not have taken yet.
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public virtual void UnfocusSpinners()
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{
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SelectNextControl(Controls[0], true, true, true, true);
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}
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private long CalcMaxMemAllowed()
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{
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long ans = (vms.Count == 0 ? VM.DEFAULT_MEM_ALLOWED : vms[0].MaxMemAllowed);
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foreach (VM vm in vms)
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{
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long max = vm.MaxMemAllowed;
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if (max < ans)
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ans = max;
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}
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return ans;
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}
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protected long maxDynMin = -1; // signal value for no constraint
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protected void CalcMaxDynMin()
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{
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maxDynMin = -1;
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if (vm0.power_state == vm_power_state.Running || vm0.power_state == vm_power_state.Paused)
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{
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// Calculate the maximum possible value of dynamic_min, by looking at all the other VMs on this host
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// and obeying the constraint sum(dynamic_min) + control domain + virtualisation overhead <= total host memory
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Host host = vm0.Connection.Resolve(vm0.resident_on);
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if (host != null)
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{
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Host_metrics host_metrics = host.Connection.Resolve(host.metrics);
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if (host_metrics != null)
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{
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long sum_dyn_min = host.memory_overhead;
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foreach (VM vm in host.Connection.ResolveAll(host.resident_VMs))
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{
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sum_dyn_min += vm.memory_overhead;
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if (vm.is_control_domain)
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{
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VM_metrics vmm = vm.Connection.Resolve(vm.metrics);
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if (vmm != null)
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sum_dyn_min += vmm.memory_actual;
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}
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else if (!vms.Contains(vm))
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sum_dyn_min += vm.memory_dynamic_min;
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}
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maxDynMin = host_metrics.memory_total - sum_dyn_min;
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if (maxDynMin < 0)
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maxDynMin = 0;
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maxDynMin /= vms.Count;
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}
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}
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}
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}
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// Maximum for dynamic_min spinner: if we have set a maxDynMin, use it,
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// except constrained by static_min and dynamic_max.
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protected long DynMinSpinnerMax
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{
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get
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{
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long maxDM = dynamic_max;
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if (maxDynMin >= 0 && maxDynMin < maxDM)
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{
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maxDM = maxDynMin;
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if (maxDM < static_min)
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maxDM = static_min;
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}
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// If we've already managed to exceed that value, don't trash the user's setting
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if (maxDM < dynamic_min)
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maxDM = dynamic_min;
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return maxDM;
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}
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}
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// Minimum for dynamic_min spinner: constrained by both static_min, and a proportion of static_max
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protected long DynMinSpinnerMin
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{
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get
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{
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long minDM = static_min;
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long limit = (long)((double)static_max * GetMemoryRatio());
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if (limit > minDM)
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minDM = limit;
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if (minDM > dynamic_min)
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minDM = dynamic_min;
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return minDM;
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}
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}
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// Static_max also has a corresponding limit: it can't go to more than 1/frac of maxDynMin,
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// or there is no legal value of dynamic_min.
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protected long StatMaxSpinnerMax
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{
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get
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{
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double frac = GetMemoryRatio();
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long maxSM = maxDynMin >= 0 && MemorySpinnerMax * frac > maxDynMin
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? (long)((double)maxDynMin / frac)
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: MemorySpinnerMax;
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if (maxSM < static_max)
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maxSM = static_max;
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return maxSM;
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}
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}
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protected long MemorySpinnerMax
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{
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get
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{
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long server = vm0.memory_static_max;
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return (server > maxMemAllowed ? server : maxMemAllowed);
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}
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}
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protected int CalcIncrement()
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{
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// Calculate a suitable increment for dynamic_min and dynamic_max, if static_max small
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int i;
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for (i = 1; i < static_max / Util.BINARY_MEGA / 8 && i < 128; i *= 2)
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;
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return i;
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}
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protected double GetMemoryRatio()
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{
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return GetMemoryRatio(vms.ToArray());
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}
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/// <summary>
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/// Get the most constrained memory ratio for a set of VMs.
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/// It is assumed they are all on the same pool.
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/// </summary>
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public static double GetMemoryRatio(params VM[] vms)
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{
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bool hvm = false;
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bool pv = false;
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foreach (VM vm in vms)
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{
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if (vm.IsHVM)
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hvm = true;
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else
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pv = true;
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}
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Pool pool = Helpers.GetPoolOfOne(vms[0].Connection);
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Dictionary<string, string> poolOtherConfig = Helpers.GetOtherConfig(pool);
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if (!pv) // only HVM
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return GetMemoryRatioValue(poolOtherConfig, true);
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else if (!hvm) // only PV
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return GetMemoryRatioValue(poolOtherConfig, false);
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else // both types of VM: return the more constraining ratio
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{
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double hvmRatio = GetMemoryRatioValue(poolOtherConfig, true);
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double pvRatio = GetMemoryRatioValue(poolOtherConfig, false);
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return (hvmRatio >= pvRatio ? hvmRatio : pvRatio);
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}
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}
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private static double GetMemoryRatioValue(Dictionary<string, string> poolOtherConfig, bool hvm)
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{
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string key = (hvm ? "memory-ratio-hvm" : "memory-ratio-pv");
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string value;
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double frac = -1.0;
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if (poolOtherConfig.TryGetValue(key, out value))
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{
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try { frac = Convert.ToDouble(value, CultureInfo.InvariantCulture); }
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catch (FormatException) { }
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catch (OverflowException) { }
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}
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if (frac < 0.0 || frac > 1.0)
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frac = 0.25; // default value for both HVM and PV if ratio absent or nonsensical
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return frac;
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}
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}
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}
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