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perf(debugger): Optimize single-stepping of eu threads

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Single-stepping threads is based on resume() and THREAD_STOPPED events
To speed up single-stepping, stopped threads must be discovered
immediately after resume() is called.
This change is adding ATT scan and event generation in resume()

Related-To: NEO-7750

Signed-off-by: Mateusz Hoppe <mateusz.hoppe@intel.com>
This commit is contained in:
Mateusz Hoppe
2023-02-21 20:35:10 +00:00
committed by Compute-Runtime-Automation
parent acececc214
commit e8b4841577
8 changed files with 254 additions and 30 deletions
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34
level_zero/tools/source/debug/linux/prelim/debug_session.cpp
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@@ -1439,6 +1439,40 @@ int DebugSessionLinux::threadControl(const std::vector<EuThread::ThreadId> &thre
return ret;
}
void DebugSessionLinux::checkStoppedThreadsAndGenerateEvents(const std::vector<EuThread::ThreadId> &threads, uint64_t memoryHandle, uint32_t deviceIndex) {
std::unique_ptr<uint8_t[]> bitmask;
size_t bitmaskSize;
[[maybe_unused]] auto attReadResult = threadControl(threads, deviceIndex, ThreadControlCmd::Stopped, bitmask, bitmaskSize);
DEBUG_BREAK_IF(attReadResult != 0);
auto hwInfo = connectedDevice->getHwInfo();
auto &l0GfxCoreHelper = connectedDevice->getL0GfxCoreHelper();
auto threadsWithAttention = l0GfxCoreHelper.getThreadsFromAttentionBitmask(hwInfo, deviceIndex, bitmask.get(), bitmaskSize);
std::vector<EuThread::ThreadId> stoppedThreadsToReport;
stoppedThreadsToReport.reserve(threads.size());
const auto &threadsToCheck = threadsWithAttention.size() > 0 ? threadsWithAttention : threads;
for (auto &threadId : threadsToCheck) {
SIP::sr_ident srMagic = {{0}};
srMagic.count = 0;
if (readSystemRoutineIdent(allThreads[threadId].get(), memoryHandle, srMagic)) {
bool wasStopped = allThreads[threadId]->isStopped();
if (allThreads[threadId]->verifyStopped(srMagic.count)) {
allThreads[threadId]->stopThread(memoryHandle);
if (!wasStopped) {
stoppedThreadsToReport.push_back(threadId);
}
}
}
}
generateEventsForStoppedThreads(stoppedThreadsToReport);
}
ze_result_t DebugSessionLinux::resumeImp(const std::vector<EuThread::ThreadId> &threads, uint32_t deviceIndex) {
std::unique_ptr<uint8_t[]> bitmask;
size_t bitmaskSize;

1
level_zero/tools/source/debug/linux/prelim/debug_session.h
View File

@@ -186,6 +186,7 @@ struct DebugSessionLinux : DebugSessionImp {
ze_result_t readEventImp(prelim_drm_i915_debug_event *drmDebugEvent);
ze_result_t resumeImp(const std::vector<EuThread::ThreadId> &threads, uint32_t deviceIndex) override;
ze_result_t interruptImp(uint32_t deviceIndex) override;
void checkStoppedThreadsAndGenerateEvents(const std::vector<EuThread::ThreadId> &threads, uint64_t memoryHandle, uint32_t deviceIndex) override;
void enqueueApiEvent(zet_debug_event_t &debugEvent) override {
pushApiEvent(debugEvent);