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/*
* Copyright (C) 2018-2020 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/command_stream/preemption.h"
#include "shared/source/built_ins/built_ins.h"
#include "shared/source/device/device.h"
#include "shared/source/helpers/string.h"
#include "opencl/source/helpers/dispatch_info.h"
#include "opencl/source/kernel/kernel.h"
namespace NEO {
bool PreemptionHelper::allowThreadGroupPreemption(const PreemptionFlags &flags) {
if (flags.flags.disablePerCtxtPreemptionGranularityControl) {
return false;
}
if (flags.flags.usesFencesForReadWriteImages &&
flags.flags.disableLSQCROPERFforOCL) {
return false;
}
if (flags.flags.schedulerKernel || flags.flags.vmeKernel) {
return false;
}
return true;
}
bool PreemptionHelper::allowMidThreadPreemption(const PreemptionFlags &flags) {
return (flags.flags.disabledMidThreadPreemptionKernel == 0) &&
!(flags.flags.vmeKernel && !flags.flags.deviceSupportsVmePreemption);
}
PreemptionMode PreemptionHelper::taskPreemptionMode(PreemptionMode devicePreemptionMode, const PreemptionFlags &flags) {
if (DebugManager.flags.ForceKernelPreemptionMode.get() != -1) {
return static_cast<PreemptionMode>(DebugManager.flags.ForceKernelPreemptionMode.get());
}
if (devicePreemptionMode == PreemptionMode::Disabled) {
return PreemptionMode::Disabled;
}
if (devicePreemptionMode >= PreemptionMode::MidThread &&
allowMidThreadPreemption(flags)) {
return PreemptionMode::MidThread;
}
if (devicePreemptionMode >= PreemptionMode::ThreadGroup &&
allowThreadGroupPreemption(flags)) {
return PreemptionMode::ThreadGroup;
}
return PreemptionMode::MidBatch;
};
void PreemptionHelper::setPreemptionLevelFlags(PreemptionFlags &flags, Device &device, Kernel *kernel) {
if (kernel) {
flags.flags.disabledMidThreadPreemptionKernel =
kernel->getKernelInfo().patchInfo.executionEnvironment &&
kernel->getKernelInfo().patchInfo.executionEnvironment->DisableMidThreadPreemption;
flags.flags.vmeKernel = kernel->isVmeKernel();
flags.flags.usesFencesForReadWriteImages =
kernel->getKernelInfo().patchInfo.executionEnvironment &&
kernel->getKernelInfo().patchInfo.executionEnvironment->UsesFencesForReadWriteImages;
flags.flags.schedulerKernel = kernel->isSchedulerKernel;
}
flags.flags.deviceSupportsVmePreemption = device.getDeviceInfo().vmeAvcSupportsPreemption;
flags.flags.disablePerCtxtPreemptionGranularityControl = device.getHardwareInfo().workaroundTable.waDisablePerCtxtPreemptionGranularityControl;
flags.flags.disableLSQCROPERFforOCL = device.getHardwareInfo().workaroundTable.waDisableLSQCROPERFforOCL;
}
PreemptionMode PreemptionHelper::taskPreemptionMode(Device &device, const MultiDispatchInfo &multiDispatchInfo) {
PreemptionMode devMode = device.getPreemptionMode();
for (const auto &di : multiDispatchInfo) {
auto kernel = di.getKernel();
PreemptionFlags flags = {};
setPreemptionLevelFlags(flags, device, kernel);
PreemptionMode taskMode = taskPreemptionMode(devMode, flags);
if (devMode > taskMode) {
devMode = taskMode;
}
PRINT_DEBUG_STRING(DebugManager.flags.PrintDebugMessages.get(), stdout, "devMode = %d, taskMode = %d.\n",
static_cast<int>(device.getPreemptionMode()), static_cast<int>(taskMode));
}
return devMode;
}
void PreemptionHelper::adjustDefaultPreemptionMode(RuntimeCapabilityTable &deviceCapabilities, bool allowMidThread, bool allowThreadGroup, bool allowMidBatch) {
if (deviceCapabilities.defaultPreemptionMode >= PreemptionMode::MidThread &&
allowMidThread) {
deviceCapabilities.defaultPreemptionMode = PreemptionMode::MidThread;
} else if (deviceCapabilities.defaultPreemptionMode >= PreemptionMode::ThreadGroup &&
allowThreadGroup) {
deviceCapabilities.defaultPreemptionMode = PreemptionMode::ThreadGroup;
} else if (deviceCapabilities.defaultPreemptionMode >= PreemptionMode::MidBatch &&
allowMidBatch) {
deviceCapabilities.defaultPreemptionMode = PreemptionMode::MidBatch;
} else {
deviceCapabilities.defaultPreemptionMode = PreemptionMode::Disabled;
}
}
PreemptionMode PreemptionHelper::getDefaultPreemptionMode(const HardwareInfo &hwInfo) {
return DebugManager.flags.ForcePreemptionMode.get() == -1
? hwInfo.capabilityTable.defaultPreemptionMode
: static_cast<PreemptionMode>(DebugManager.flags.ForcePreemptionMode.get());
}
} // namespace NEO
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