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Diffstat (limited to '')
| -rw-r--r-- | tools/profiler/gecko/ProfilerIOInterposeObserver.cpp | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/tools/profiler/gecko/ProfilerIOInterposeObserver.cpp b/tools/profiler/gecko/ProfilerIOInterposeObserver.cpp new file mode 100644 index 0000000000..cf33789f69 --- /dev/null +++ b/tools/profiler/gecko/ProfilerIOInterposeObserver.cpp @@ -0,0 +1,216 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "ProfilerIOInterposeObserver.h" +#include "GeckoProfiler.h" + +using namespace mozilla; + +/* static */ +ProfilerIOInterposeObserver& ProfilerIOInterposeObserver::GetInstance() { + static ProfilerIOInterposeObserver sProfilerIOInterposeObserver; + return sProfilerIOInterposeObserver; +} + +namespace geckoprofiler::markers { +struct FileIOMarker { + static constexpr Span<const char> MarkerTypeName() { + return MakeStringSpan("FileIO"); + } + static void StreamJSONMarkerData(baseprofiler::SpliceableJSONWriter& aWriter, + const ProfilerString8View& aOperation, + const ProfilerString8View& aSource, + const ProfilerString8View& aFilename, + MarkerThreadId aOperationThreadId) { + aWriter.StringProperty("operation", aOperation); + aWriter.StringProperty("source", aSource); + if (aFilename.Length() != 0) { + aWriter.StringProperty("filename", aFilename); + } + if (!aOperationThreadId.IsUnspecified()) { + // Tech note: If `ToNumber()` returns a uint64_t, the conversion to + // int64_t is "implementation-defined" before C++20. This is acceptable + // here, because this is a one-way conversion to a unique identifier + // that's used to visually separate data by thread on the front-end. + aWriter.IntProperty( + "threadId", + static_cast<int64_t>(aOperationThreadId.ThreadId().ToNumber())); + } + } + static MarkerSchema MarkerTypeDisplay() { + using MS = MarkerSchema; + MS schema{MS::Location::MarkerChart, MS::Location::MarkerTable, + MS::Location::TimelineFileIO}; + schema.AddKeyLabelFormatSearchable("operation", "Operation", + MS::Format::String, + MS::Searchable::Searchable); + schema.AddKeyLabelFormatSearchable("source", "Source", MS::Format::String, + MS::Searchable::Searchable); + schema.AddKeyLabelFormatSearchable("filename", "Filename", + MS::Format::FilePath, + MS::Searchable::Searchable); + schema.AddKeyLabelFormatSearchable("threadId", "Thread ID", + MS::Format::String, + MS::Searchable::Searchable); + return schema; + } +}; +} // namespace geckoprofiler::markers + +static auto GetFilename(IOInterposeObserver::Observation& aObservation) { + AUTO_PROFILER_STATS(IO_filename); + constexpr size_t scExpectedMaxFilename = 512; + nsAutoStringN<scExpectedMaxFilename> filename16; + aObservation.Filename(filename16); + nsAutoCStringN<scExpectedMaxFilename> filename8; + if (!filename16.IsEmpty()) { + CopyUTF16toUTF8(filename16, filename8); + } + return filename8; +} + +void ProfilerIOInterposeObserver::Observe(Observation& aObservation) { + if (profiler_is_locked_on_current_thread()) { + // Don't observe I/Os originating from the profiler itself (when internally + // locked) to avoid deadlocks when calling profiler functions. + AUTO_PROFILER_STATS(IO_profiler_locked); + return; + } + + Maybe<uint32_t> maybeFeatures = profiler_features_if_active_and_unpaused(); + if (maybeFeatures.isNothing()) { + return; + } + uint32_t features = *maybeFeatures; + + if (!profiler_thread_is_being_profiled_for_markers( + profiler_main_thread_id()) && + !profiler_thread_is_being_profiled_for_markers()) { + return; + } + + AUTO_PROFILER_LABEL("ProfilerIOInterposeObserver", PROFILER); + if (IsMainThread()) { + // This is the main thread. + // Capture a marker if any "IO" feature is on. + // If it's not being profiled, we have nowhere to store FileIO markers. + if (!profiler_thread_is_being_profiled_for_markers() || + !(features & ProfilerFeature::MainThreadIO)) { + return; + } + AUTO_PROFILER_STATS(IO_MT); + nsAutoCString type{aObservation.FileType()}; + type.AppendLiteral("IO"); + + // Store the marker in the current thread. + PROFILER_MARKER( + type, OTHER, + MarkerOptions( + MarkerTiming::Interval(aObservation.Start(), aObservation.End()), + MarkerStack::Capture()), + FileIOMarker, + // aOperation + ProfilerString8View::WrapNullTerminatedString( + aObservation.ObservedOperationString()), + // aSource + ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()), + // aFilename + GetFilename(aObservation), + // aOperationThreadId - Do not include a thread ID, as it's the same as + // the markers. Only include this field when the marker is being sent + // from another thread. + MarkerThreadId{}); + + } else if (profiler_thread_is_being_profiled_for_markers()) { + // This is a non-main thread that is being profiled. + if (!(features & ProfilerFeature::FileIO)) { + return; + } + AUTO_PROFILER_STATS(IO_off_MT); + + nsAutoCString type{aObservation.FileType()}; + type.AppendLiteral("IO"); + + // Share a backtrace between the marker on this thread, and the marker on + // the main thread. + UniquePtr<ProfileChunkedBuffer> backtrace = profiler_capture_backtrace(); + + // Store the marker in the current thread. + PROFILER_MARKER( + type, OTHER, + MarkerOptions( + MarkerTiming::Interval(aObservation.Start(), aObservation.End()), + backtrace ? MarkerStack::UseBacktrace(*backtrace) + : MarkerStack::NoStack()), + FileIOMarker, + // aOperation + ProfilerString8View::WrapNullTerminatedString( + aObservation.ObservedOperationString()), + // aSource + ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()), + // aFilename + GetFilename(aObservation), + // aOperationThreadId - Do not include a thread ID, as it's the same as + // the markers. Only include this field when the marker is being sent + // from another thread. + MarkerThreadId{}); + + // Store the marker in the main thread as well, with a distinct marker name + // and thread id. + type.AppendLiteral(" (non-main thread)"); + PROFILER_MARKER( + type, OTHER, + MarkerOptions( + MarkerTiming::Interval(aObservation.Start(), aObservation.End()), + backtrace ? MarkerStack::UseBacktrace(*backtrace) + : MarkerStack::NoStack(), + // This is the important piece that changed. + // It will send a marker to the main thread. + MarkerThreadId::MainThread()), + FileIOMarker, + // aOperation + ProfilerString8View::WrapNullTerminatedString( + aObservation.ObservedOperationString()), + // aSource + ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()), + // aFilename + GetFilename(aObservation), + // aOperationThreadId - Include the thread ID in the payload. + MarkerThreadId::CurrentThread()); + + } else { + // This is a thread that is not being profiled. We still want to capture + // file I/Os (to the main thread) if the "FileIOAll" feature is on. + if (!(features & ProfilerFeature::FileIOAll)) { + return; + } + AUTO_PROFILER_STATS(IO_other); + nsAutoCString type{aObservation.FileType()}; + if (profiler_is_active_and_thread_is_registered()) { + type.AppendLiteral("IO (non-profiled thread)"); + } else { + type.AppendLiteral("IO (unregistered thread)"); + } + + // Only store this marker on the main thread, as this thread was not being + // profiled. + PROFILER_MARKER( + type, OTHER, + MarkerOptions( + MarkerTiming::Interval(aObservation.Start(), aObservation.End()), + MarkerStack::Capture(), + // Store this marker on the main thread. + MarkerThreadId::MainThread()), + FileIOMarker, + // aOperation + ProfilerString8View::WrapNullTerminatedString( + aObservation.ObservedOperationString()), + // aSource + ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()), + // aFilename + GetFilename(aObservation), + // aOperationThreadId - Note which thread this marker is coming from. + MarkerThreadId::CurrentThread()); + } +} |