[SYCL] Eliminate XPTI overhead when it is disabled #18334
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sergey-semenov
approved these changes
May 6, 2025
Bensuo
approved these changes
May 6, 2025
Signed-off-by: Sergei Vinogradov <sergey.vinogradov@intel.com>
Signed-off-by: Sergei Vinogradov <sergey.vinogradov@intel.com>
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@intel/llvm-gatekeepers PR is ready to be merged. CI failure is unrelated to this PR, see #17486 |
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Even if the XPTI collector is not used, we still have some overhead related to XPTI instrumentation when we call
xptiRegisterStreamfunction.With these changes, we cache the result of the
xptiTraceEnabledfunction in the static variables. It is safe to cache it because XPTI collector is enabled by theXPTI_FRAMEWORK_DISPATCHERenvironment variable before the process starts.VTune shows ~2% decrease in the number of instructions retired on a submit kernel path.