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Check if xptiTraceEnabled only once on the hot paths #20320

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Merged
merged 4 commits into from
Oct 8, 2025
Merged

Check if xptiTraceEnabled only once on the hot paths #20320

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bf55536
Check if xptiTraceEnabled only once on the hot paths
vinser52 Oct 8, 2025
0d929d0
Update sycl/source/detail/queue_impl.cpp
vinser52 Oct 8, 2025
b616b3c
Update sycl/source/detail/queue_impl.cpp
vinser52 Oct 8, 2025
d67fe52
Update sycl/source/detail/graph/graph_impl.cpp
vinser52 Oct 8, 2025
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3 changes: 2 additions & 1 deletion sycl/source/detail/graph/graph_impl.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -742,8 +742,9 @@ exec_graph_impl::enqueueNodeDirect(const sycl::context &Ctx,
const bool xptiEnabled = xptiTraceEnabled();
xpti_td *CmdTraceEvent = nullptr;
uint64_t InstanceID = 0;
auto StreamID = detail::getActiveXPTIStreamID();
uint8_t StreamID;
if (xptiEnabled) {
StreamID = detail::getActiveXPTIStreamID();
sycl::detail::CGExecKernel *CGExec =
static_cast<sycl::detail::CGExecKernel *>(Node.MCommandGroup.get());
sycl::detail::code_location CodeLoc(CGExec->MFileName.c_str(),
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17 changes: 12 additions & 5 deletions sycl/source/detail/queue_impl.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -448,11 +448,12 @@ EventImplPtr queue_impl::submit_kernel_scheduler_bypass(
#ifdef XPTI_ENABLE_INSTRUMENTATION
xpti_td *CmdTraceEvent = nullptr;
uint64_t InstanceID = 0;
auto StreamID = detail::getActiveXPTIStreamID();
uint8_t StreamID;
// Only enable instrumentation if there are subscribes to the SYCL
// stream
const bool xptiEnabled = xptiCheckTraceEnabled(StreamID);
const bool xptiEnabled = xptiTraceEnabled();
if (xptiEnabled) {
StreamID = detail::getActiveXPTIStreamID();
std::tie(CmdTraceEvent, InstanceID) = emitKernelInstrumentationData(
StreamID, KernelImplPtr, CodeLoc, IsTopCodeLoc,
*KData.getDeviceKernelInfoPtr(), this, KData.getNDRDesc(),
Expand Down Expand Up @@ -843,8 +844,12 @@ void queue_impl::wait(const detail::code_location &CodeLoc) {
void *TelemetryEvent = nullptr;
uint64_t IId;
std::string Name;
auto StreamID = detail::getActiveXPTIStreamID();
TelemetryEvent = instrumentationProlog(CodeLoc, Name, StreamID, IId);
uint8_t StreamID;
const bool xptiEnabled = xptiTraceEnabled();
if (xptiEnabled) {
StreamID = detail::getActiveXPTIStreamID();
TelemetryEvent = instrumentationProlog(CodeLoc, Name, StreamID, IId);
}
#endif

if (!MGraph.expired()) {
Expand Down Expand Up @@ -926,7 +931,9 @@ void queue_impl::wait(const detail::code_location &CodeLoc) {
#ifdef XPTI_ENABLE_INSTRUMENTATION
// There is an early return in instrumentationEpilog() if no subscribers are
// subscribing to queue.wait().
instrumentationEpilog(TelemetryEvent, Name, StreamID, IId);
if (xptiEnabled) {
instrumentationEpilog(TelemetryEvent, Name, StreamID, IId);
}
#endif
}

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