VMEmt.cpp revision 1d2d38b5af44dca06849ba586f29753c3c982072
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * VM - Virtual Machine, The Emulation Thread.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Copyright (C) 2006-2007 Sun Microsystems, Inc.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * available from http://www.virtualbox.org. This file is free software;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * you can redistribute it and/or modify it under the terms of the GNU
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * General Public License (GPL) as published by the Free Software
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Clara, CA 95054 USA or visit http://www.sun.com if you need
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * additional information or have any questions.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync/*******************************************************************************
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync* Header Files *
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync*******************************************************************************/
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * The emulation thread.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @returns Thread exit code.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param ThreadSelf The handle to the executing thread.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pvArgs Pointer to the user mode VM structure (UVM).
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncDECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArgs)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync AssertReleaseMsg(VALID_PTR(pUVM) && pUVM->u32Magic == UVM_MAGIC,
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync ("Invalid arguments to the emulation thread!\n"));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Init the native thread member.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.NativeThreadEMT = RTThreadGetNative(ThreadSelf);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * The request loop.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: Emulation thread starting the days work... Thread=%#x pUVM=%p\n", ThreadSelf, pUVM));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /* Requested to exit the EMT thread out of sync? (currently only VMR3WaitForResume) */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * During early init there is no pVM, so make a special path
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * for that to keep things clearly separate.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Check for termination first.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Service execute in EMT request.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: Req rc=%Vrc, VM state %d -> %d\n", rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_CREATING));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Nothing important is pending, so wait for something.
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * Pending requests which needs servicing?
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * We check for state changes in addition to status codes when
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * servicing requests. (Look after the ifs.)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Service execute in EMT request.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: Req rc=%Vrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Service the debugger request.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: Dbg rc=%Vrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
2e42e0850e182e37277fe28ba5b5d1c37018e783vboxsync * Service a delayed reset request.
2e42e0850e182e37277fe28ba5b5d1c37018e783vboxsync Log(("vmR3EmulationThread: Reset rc=%Vrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
2e42e0850e182e37277fe28ba5b5d1c37018e783vboxsync * Nothing important is pending, so wait for something.
2e42e0850e182e37277fe28ba5b5d1c37018e783vboxsync * Check for termination requests, these have extremely high priority.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Some requests (both VMR3Req* and the DBGF) can potentially
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * resume or start the VM, in that case we'll get a change in
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * VM status indicating that we're now running.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: EMR3ExecuteVM() -> rc=%Vrc, enmVMState=%d\n", rc, pVM->enmVMState));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync } /* forever */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: Terminating emulation thread! Thread=%#x pUVM=%p rc=%Vrc enmBefore=%d enmVMState=%d\n",
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync ThreadSelf, pUVM, rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_TERMINATED));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: executing delayed Destroy\n"));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /* we don't reset ThreadEMT here because it's used in waiting. */
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync Log(("vmR3EmulationThread: EMT is terminated.\n"));
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * Wait for VM to be resumed. Handle events like vmR3EmulationThread does.
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * In case the VM is stopped, clean up and long jump to the main EMT loop.
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * @returns VINF_SUCCESS or doesn't return
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * @param pVM VM handle.
b011d23442f2b9e7208db889ff4b5ffe2c8effc8vboxsync * The request loop.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Pending requests which needs servicing?
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * We check for state changes in addition to status codes when
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * servicing requests. (Look after the ifs.)
bd720a6cefa808ffed334825a272cc0d3f2680b8vboxsync * Service execute in EMT request.
bd720a6cefa808ffed334825a272cc0d3f2680b8vboxsync Log(("vmR3EmulationThread: Req rc=%Vrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Service the debugger request.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: Dbg rc=%Vrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Service a delay reset request.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync Log(("vmR3EmulationThread: Reset rc=%Vrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Nothing important is pending, so wait for something.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Check for termination requests, these are extremely high priority.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Some requests (both VMR3Req* and the DBGF) can potentially
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * resume or start the VM, in that case we'll get a change in
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * VM status indicating that we're now running.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /* Only valid exit reason. */
f4859dbc9e6e61d81adba530beddf0c374ac9011vboxsync } /* forever */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /* Return to the main loop in vmR3EmulationThread, which will clean up for us. */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Gets the name of a halt method.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @returns Pointer to a read only string.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param enmMethod The method.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic const char *vmR3GetHaltMethodName(VMHALTMETHOD enmMethod)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //case VMHALTMETHOD_2: return "method2";
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync default: return "unknown";
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * The old halt loop.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(int) vmR3HaltOldDoHalt(PUVM pUVM, const uint32_t fMask, uint64_t /* u64Now*/)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Halt loop.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //unsigned cLoops = 0;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Work the timers and check if we can exit.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * The poll call gives us the ticks left to the next event in
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * addition to perhaps set an FF.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltPoll, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltPoll, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltTimers, b);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltTimers, b);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Wait for a while. Someone will wake us up or interrupt the call if
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * anything needs our attention.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogPrintf("u64NanoTS=%RI64 cLoops=%d spin\n", u64NanoTS, cLoops++);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /* spin */;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //uint64_t u64Start = RTTimeNanoTS();
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync if (u64NanoTS < 870000) /* this is a bit speculative... works fine on linux. */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogPrintf("u64NanoTS=%RI64 cLoops=%d yield", u64NanoTS, cLoops++);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltYield, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync RTThreadYield(); /* this is the best we can do here */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltYield, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep 1ms", u64NanoTS, cLoops++);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep %dms", u64NanoTS, cLoops++, (uint32_t)RT_MIN((u64NanoTS - 500000) / 1000000, 15));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync rc = RTSemEventWait(pUVM->vm.s.EventSemWait, RT_MIN((u64NanoTS - 1000000) / 1000000, 15));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //uint64_t u64Slept = RTTimeNanoTS() - u64Start;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogPrintf(" -> rc=%Vrc in %RU64 ns / %RI64 ns delta\n", rc, u64Slept, u64NanoTS - u64Slept);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Initialize the configuration of halt method 1 & 2.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @return VBox status code. Failure on invalid CFGM data.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pVM The VM handle.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * The defaults.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 2*1000000;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 75*1000000;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 30*1000000;
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 20*1000000;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 5*1000000;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 200*1000000;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 20*1000000;
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 2*1000000;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Query overrides.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * I don't have time to bother with niceities such as invalid value checks
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * here right now. sorry.
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pUVM->pVM), "/VMM/HaltedMethod1");
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "LagBlockIntervalDivisor", &u32)))
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = u32;
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MinBlockInterval", &u32)))
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = u32;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MaxBlockInterval", &u32)))
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = u32;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StartSpinning", &u32)))
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = u32;
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StopSpinning", &u32)))
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Initialize halt method 1.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @return VBox status code.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(int) vmR3HaltMethod1Init(PUVM pUVM)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Method 1 - Block whenever possible, and when lagging behind
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * switch to spinning for 10-30ms with occational blocking until
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * the lag has been eliminated.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(int) vmR3HaltMethod1Halt(PUVM pUVM, const uint32_t fMask, uint64_t u64Now)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * To simplify things, we decide up-front whether we should switch to spinning or
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * not. This makes some ASSUMPTIONS about the cause of the spinning (PIT/RTC/PCNet)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * and that it will generate interrupts or other events that will cause us to exit
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * the halt loop.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync bool fBlockOnce = false;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync bool fSpinning = false;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync uint32_t u32CatchUpPct = TMVirtualSyncGetCatchUpPct(pVM);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StopSpinningCfg;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync fBlockOnce = u64Now - pUVM->vm.s.Halt.Method12.u64LastBlockTS
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync > RT_MAX(pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg,
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync RT_MIN(u64Lag / pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVM->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StartSpinningCfg;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVM->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Halt loop.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync unsigned cLoops = 0;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Work the timers and check if we can exit.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltPoll, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltPoll, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltTimers, b);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltTimers, b);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Estimate time left to the next event.
2805b95732a8d26015a397626b96049a6e6573e7vboxsync uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Block if we're not spinning and the interval isn't all that small.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync const uint64_t Start = pUVM->vm.s.Halt.Method12.u64LastBlockTS = RTTimeNanoTS();
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync uint32_t cMilliSecs = RT_MIN(u64NanoTS / 1000000, 15);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync if (cMilliSecs <= pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync cMilliSecs -= pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync rc = RTSemEventWait(pUVM->vm.s.EventSemWait, cMilliSecs);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Calc the statistics.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Update averages every 16th time, and flush parts of the history every 64th time.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.cNSBlockedTooLong += Elapsed - u64NanoTS;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg = pUVM->vm.s.Halt.Method12.cNSBlockedTooLong / pUVM->vm.s.Halt.Method12.cBlocks;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync pUVM->vm.s.Halt.Method12.cNSBlockedTooLong = pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg * 0x40;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogRelPrintf(" -> %7RU64 ns / %7RI64 ns delta%s\n", Elapsed, Elapsed - u64NanoTS, fBlockOnce ? " (block once)" : "");
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Clear the block once flag if we actually blocked.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Initialize the global 1 halt method.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @return VBox status code.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(int) vmR3HaltGlobal1Init(PUVM pUVM)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * The global 1 halt method - Block in GMM (ring-0) and let it
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * try take care of the global scheduling of EMT threads.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(int) vmR3HaltGlobal1Halt(PUVM pUVM, const uint32_t fMask, uint64_t u64Now)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Halt loop.
2805b95732a8d26015a397626b96049a6e6573e7vboxsync unsigned cLoops = 0;
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Work the timers and check if we can exit.
7f17f0ea0209f234bdebdf0509c0e2b74e732f69vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltPoll, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltPoll, a);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltTimers, b);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltTimers, b);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Estimate time left to the next event.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync uint64_t u64GipTime = TMTimerPollGIP(pVM, &u64Delta);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Block if we're not spinning and the interval isn't all that small.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, c);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_HALT, u64GipTime, NULL);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, c);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync AssertMsgFailed(("VMMR0_DO_GVMM_SCHED_HALT->%Vrc\n", rc));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * When spinning call upon the GVMM and do some wakups once
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * in a while, it's not like we're actually busy or anything.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltYield, d);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_POLL, false /* don't yield */, NULL);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltYield, d);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync * The global 1 halt method - VMR3Wait() worker.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @returns VBox status code.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(int) vmR3HaltGlobal1Wait(PUVM pUVM)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Check Relevant FFs.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync if (VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK))
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Wait for a while. Someone will wake us up or interrupt the call if
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync * anything needs our attention.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_HALT, RTTimeNanoTS() + 1000000000 /* +1s */, NULL);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * The global 1 halt method - VMR3NotifyFF() worker.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param fNotifiedREM See VMR3NotifyFF().
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(void) vmR3HaltGlobal1NotifyFF(PUVM pUVM, bool fNotifiedREM)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync int rc = SUPCallVMMR0Ex(pUVM->pVM->pVMR0, VMMR0_DO_GVMM_SCHED_WAKE_UP, 0, NULL);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Bootstrap VMR3Wait() worker.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @returns VBox status code.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(int) vmR3BootstrapWait(PUVM pUVM)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Check Relevant FFs.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync && VM_FF_ISPENDING(pUVM->pVM, VM_FF_EXTERNAL_SUSPENDED_MASK))
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Wait for a while. Someone will wake us up or interrupt the call if
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * anything needs our attention.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync rc = RTSemEventWait(pUVM->vm.s.EventSemWait, 1000);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Bootstrap VMR3NotifyFF() worker.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param fNotifiedREM See VMR3NotifyFF().
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncstatic DECLCALLBACK(void) vmR3BootstrapNotifyFF(PUVM pUVM, bool fNotifiedREM)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync int rc = RTSemEventSignal(pUVM->vm.s.EventSemWait);
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Default VMR3Wait() worker.
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync * @returns VBox status code.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Check Relevant FFs.
f4859dbc9e6e61d81adba530beddf0c374ac9011vboxsync if (VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK))
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Wait for a while. Someone will wake us up or interrupt the call if
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * anything needs our attention.
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync rc = RTSemEventWait(pUVM->vm.s.EventSemWait, 1000);
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync * Default VMR3NotifyFF() worker.
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync * @param pUVM Pointer to the user mode VM structure.
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync * @param fNotifiedREM See VMR3NotifyFF().
a9c682f4c99869f4d6837193f9713eea79822c06vboxsyncstatic DECLCALLBACK(void) vmR3DefaultNotifyFF(PUVM pUVM, bool fNotifiedREM)
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync int rc = RTSemEventSignal(pUVM->vm.s.EventSemWait);
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync * Array with halt method descriptors.
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync * VMINT::iHaltMethod contains an index into this array.
a9c682f4c99869f4d6837193f9713eea79822c06vboxsyncstatic const struct VMHALTMETHODDESC
a9c682f4c99869f4d6837193f9713eea79822c06vboxsync /** The halt method id. */
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync /** The init function for loading config and initialize variables. */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /** The term function. */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /** The halt function. */
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync DECLR3CALLBACKMEMBER(int, pfnHalt,(PUVM pUVM, const uint32_t fMask, uint64_t u64Now));
f2d4fe7c062d5d0501fadae94d1d3521bf31e4acvboxsync /** The wait function. */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync /** The notifyFF function. */
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync DECLR3CALLBACKMEMBER(void, pfnNotifyFF,(PUVM pUVM, bool fNotifiedREM));
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync { VMHALTMETHOD_BOOTSTRAP, NULL, NULL, NULL, vmR3BootstrapWait, vmR3BootstrapNotifyFF },
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync { VMHALTMETHOD_OLD, NULL, NULL, vmR3HaltOldDoHalt, vmR3DefaultWait, vmR3DefaultNotifyFF },
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync { VMHALTMETHOD_1, vmR3HaltMethod1Init, NULL, vmR3HaltMethod1Halt, vmR3DefaultWait, vmR3DefaultNotifyFF },
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync //{ VMHALTMETHOD_2, vmR3HaltMethod2Init, vmR3HaltMethod2Term, vmR3HaltMethod2DoHalt, vmR3HaltMethod2Wait, vmR3HaltMethod2NotifyFF },
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync { VMHALTMETHOD_GLOBAL_1,vmR3HaltGlobal1Init, NULL, vmR3HaltGlobal1Halt, vmR3HaltGlobal1Wait, vmR3HaltGlobal1NotifyFF },
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * Notify the emulation thread (EMT) about pending Forced Action (FF).
f2d4fe7c062d5d0501fadae94d1d3521bf31e4acvboxsync * This function is called by thread other than EMT to make
f2d4fe7c062d5d0501fadae94d1d3521bf31e4acvboxsync * sure EMT wakes up and promptly service an FF request.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pVM VM handle.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param fNotifiedREM Set if REM have already been notified. If clear the
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * generic REMR3NotifyFF() method is called.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncVMR3DECL(void) VMR3NotifyFF(PVM pVM, bool fNotifiedREM)
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVM, fNotifiedREM);
df3faec6dead5801ee07120bff7940a2c8ed6296vboxsync * Notify the emulation thread (EMT) about pending Forced Action (FF).
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * This function is called by thread other than EMT to make
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * sure EMT wakes up and promptly service an FF request.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param pUVM Pointer to the user mode VM structure.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * @param fNotifiedREM Set if REM have already been notified. If clear the
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync * generic REMR3NotifyFF() method is called.
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsyncVMR3DECL(void) VMR3NotifyFFU(PUVM pUVM, bool fNotifiedREM)
e1fd337d575f2a4c053c6fe7a811e2fd1a31e874vboxsync g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVM, fNotifiedREM);
return VINF_SUCCESS;
return rc;
if ( pVM
return VINF_SUCCESS;
return rc;
AssertReturn(enmHaltMethod > VMHALTMETHOD_INVALID && enmHaltMethod < VMHALTMETHOD_END, VERR_INVALID_PARAMETER);
return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Invalid VM/HaltMethod value %d"), enmHaltMethod);
return VINF_SUCCESS;