Cherrypick ws fix

core/runtime/BUILD

@@ -86,21 +86,39 @@ cc_library(
         "DeviceList.cpp",
         "Platform.cpp",
         "RTDevice.cpp",
+        "RuntimeSettings.cpp",
         "TRTEngine.cpp",
         "TRTEngineProfiler.cpp",
+        "TRTRuntimeConfig.cpp",
         "execute_engine.cpp",
         "runtime.cpp",
         "runtime_utils.cpp",
     ],
     hdrs = [
         "Platform.h",
         "RTDevice.h",
-        "TensorRTBindingNames.h",
+        "RuntimeSettings.h",
         "TRTEngine.h",
         "TRTEngineProfiler.h",
+        "TRTRuntimeConfig.h",
+        "TensorRTBindingNames.h",
         "runtime.h",
     ],
     copts = if_torch_nccl(["-DUSE_C10D_NCCL"]),
+    defines = select({
+        # nvinfer1::IRuntimeConfig (and the matching ICudaEngine::createRuntimeConfig
+        # / createExecutionContext(IRuntimeConfig*) overloads) was introduced in
+        # TensorRT 10.11. The TensorRT shipped with the Jetpack l4t-r36.4 toolchain
+        # (@tensorrt_l4t) predates 10.11 and does not export this type. Every other
+        # configuration here (RTX, SBSA, Windows, default x86_64 Linux) is on a
+        # TensorRT >= 10.11 bundle, so it gets the macro.
+        #
+        # Gate every IRuntimeConfig-using site in core/runtime with
+        # `#ifdef TRT_HAS_IRUNTIME_CONFIG`; the Jetpack path falls back to the
+        # legacy createExecutionContext() no-arg overload.
+        ":jetpack": [],
+        "//conditions:default": ["TRT_HAS_IRUNTIME_CONFIG"],
+    }),
     linkopts = [
         "-lstdc++fs",
     ],
@@ -135,9 +153,11 @@ cc_library(
     hdrs = [
         "Platform.h",
         "RTDevice.h",
-        "TensorRTBindingNames.h",
+        "RuntimeSettings.h",
         "TRTEngine.h",
         "TRTEngineProfiler.h",
+        "TRTRuntimeConfig.h",
+        "TensorRTBindingNames.h",
         "runtime.h",
     ],
     deps = [
@@ -151,9 +171,11 @@ filegroup(
     srcs = [
         "Platform.h",
         "RTDevice.h",
-        "TensorRTBindingNames.h",
+        "RuntimeSettings.h",
         "TRTEngine.h",
         "TRTEngineProfiler.h",
+        "TRTRuntimeConfig.h",
+        "TensorRTBindingNames.h",
         "runtime.h",
     ],
     visibility = ["//visibility:public"],

core/runtime/RuntimeSettings.cpp

@@ -0,0 +1,231 @@
+#include "core/runtime/RuntimeSettings.h"
+
+#include <array>
+#include <cstring>
+#include <iterator>
+#include <sstream>
+#include <tuple>
+#include <type_traits>
+
+// ``at::empty`` (factory function) lives in ``ATen/Functions.h``. Some bundled
+// torch builds (e.g. torch_l4t on Jetpack) only ship the minimal
+// ``ATen/core/Tensor.h`` transitively, so include the full ATen surface here.
+#include "ATen/ATen.h"
+#include "core/util/prelude.h"
+
+namespace torch_tensorrt {
+namespace core {
+namespace runtime {
+
+namespace {
+
+// Reverse-lookup tables. Indices match the enum integer values (which mirror
+// the nvinfer1 enums). Out-of-range -> "<unknown>".
+constexpr std::array<std::string_view, 3> kDsStrategyNames = {"lazy", "eager", "none"};
+constexpr std::array<std::string_view, 2> kCgStrategyNames = {"disabled", "whole_graph_capture"};
+
+// "a|b|c" from {"a", "b", "c"}. Used to render the accepted-names tail of the
+// validator error messages.
+template <size_t N>
+std::string join_string_views(std::string_view sep, std::array<std::string_view, N> const& parts) {
+  if (N == 0) {
+    return {};
+  }
+  std::ostringstream os;
+  os << parts.front();
+  for (auto it = std::next(std::cbegin(parts)); it != std::cend(parts); ++it) {
+    os << sep << *it;
+  }
+  return os.str();
+}
+
+// "(expected 0..N-1 mapping to a|b|c)" -- the common error-message tail.
+template <size_t N>
+std::string format_expected_strategy(std::array<std::string_view, N> const& names) {
+  std::ostringstream os;
+  os << "(expected 0.." << (N - 1) << " mapping to " << join_string_views("|", names) << ')';
+  return os.str();
+}
+
+// "(expected a|b|c)" -- name-only variant for ``from_string`` errors.
+template <size_t N>
+std::string format_expected_name(std::array<std::string_view, N> const& names) {
+  std::ostringstream os;
+  os << "(expected " << join_string_views("|", names) << ')';
+  return os.str();
+}
+
+} // namespace
+
+// ---- DynamicShapesKernelSpecializationStrategy -----------------------------
+
+std::string_view DynamicShapesKernelSpecializationStrategy::to_string() const noexcept {
+  // Negative underlying values wrap to a huge ``size_t``, so a single bounds
+  // check from the top covers both ends without needing ``std::clamp``.
+  auto const i = static_cast<size_t>(v_);
+  return i < std::size(kDsStrategyNames) ? kDsStrategyNames[i] : std::string_view{"<unknown>"};
+}
+
+DynamicShapesKernelSpecializationStrategy DynamicShapesKernelSpecializationStrategy::from_underlying(int64_t v) {
+  TORCHTRT_CHECK(
+      v >= 0 && static_cast<size_t>(v) < std::size(kDsStrategyNames),
+      "Invalid dynamic_shapes_kernel_specialization_strategy int: " << v << " "
+                                                                    << format_expected_strategy(kDsStrategyNames));
+  return DynamicShapesKernelSpecializationStrategy(static_cast<Value>(v));
+}
+
+DynamicShapesKernelSpecializationStrategy DynamicShapesKernelSpecializationStrategy::from_string(
+    std::string_view name) {
+  for (size_t i = 0; i < std::size(kDsStrategyNames); ++i) {
+    if (kDsStrategyNames[i] == name) {
+      return DynamicShapesKernelSpecializationStrategy(static_cast<Value>(i));
+    }
+  }
+  TORCHTRT_CHECK(
+      false,
+      "Invalid dynamic_shapes_kernel_specialization_strategy name: " << name << " "
+                                                                     << format_expected_name(kDsStrategyNames));
+}
+
+// ---- CudaGraphStrategy -----------------------------------------------------
+
+std::string_view CudaGraphStrategy::to_string() const noexcept {
+  auto const i = static_cast<size_t>(v_);
+  return i < std::size(kCgStrategyNames) ? kCgStrategyNames[i] : std::string_view{"<unknown>"};
+}
+
+CudaGraphStrategy CudaGraphStrategy::from_underlying(int64_t v) {
+  TORCHTRT_CHECK(
+      v >= 0 && static_cast<size_t>(v) < std::size(kCgStrategyNames),
+      "Invalid cuda_graph_strategy int: " << v << " " << format_expected_strategy(kCgStrategyNames));
+  return CudaGraphStrategy(static_cast<Value>(v));
+}
+
+CudaGraphStrategy CudaGraphStrategy::from_string(std::string_view name) {
+  for (size_t i = 0; i < std::size(kCgStrategyNames); ++i) {
+    if (kCgStrategyNames[i] == name) {
+      return CudaGraphStrategy(static_cast<Value>(i));
+    }
+  }
+  TORCHTRT_CHECK(false, "Invalid cuda_graph_strategy name: " << name << " " << format_expected_name(kCgStrategyNames));
+}
+
+// ---- RuntimeCacheHandle methods ---------------------------------------------
+//
+// The ``#ifdef TRT_MAJOR_RTX`` is intentionally confined to this translation
+// unit: the public header advertises a uniform interface (always-callable
+// methods that simply degrade to no-ops on non-RTX builds), and the JIT-binding
+// registration file (``register_jit_hooks.cpp``) calls these as plain member
+// references with zero conditional compilation.
+
+at::Tensor RuntimeCacheHandle::serialize() const {
+  auto const opts = at::TensorOptions().dtype(at::kByte);
+  auto const empty = [&]() { return at::empty({0}, opts); };
+#ifdef TRT_MAJOR_RTX
+  std::lock_guard<std::mutex> lock(state_mu_);
+  if (!trt_handle_) {
+    LOG_WARNING(
+        "RuntimeCacheHandle::serialize() called before the IRuntimeCache was materialized; returning empty bytes.");
+    return empty();
+  }
+  auto host_mem = make_trt(trt_handle_->serialize());
+  TORCHTRT_CHECK(host_mem, "IRuntimeCache::serialize() returned null host memory; cannot serialize cache bytes.");
+  auto tensor = at::empty({static_cast<int64_t>(host_mem->size())}, opts);
+  std::memcpy(tensor.data_ptr(), host_mem->data(), host_mem->size());
+  return tensor;
+#else
+  LOG_WARNING("RuntimeCacheHandle::serialize() invoked on a non-RTX build; returning empty bytes.");
+  return empty();
+#endif
+}
+
+void RuntimeCacheHandle::deserialize(TORCHTRT_UNUSED at::Tensor data) {
+#ifdef TRT_MAJOR_RTX
+  if (data.numel() == 0) {
+    LOG_WARNING("RuntimeCacheHandle::deserialize() called with an empty tensor; nothing to load.");
+    return;
+  }
+  auto contig = data.contiguous().to(at::kCPU);
+  std::lock_guard<std::mutex> lock(state_mu_);
+  if (trt_handle_) {
+    // Live cache -- write through directly.
+    trt_handle_->deserialize(contig.data_ptr(), static_cast<size_t>(contig.numel()));
+  } else {
+    // No live cache yet -- stash bytes for the next ``ensure_materialized``
+    // call to drain. Fixes the cpp-rt warm-start path where ``wrapper.load()``
+    // fires before any engine has materialized ``trt_handle_``.
+    auto const* p = static_cast<uint8_t const*>(contig.data_ptr());
+    pending_warm_bytes_.assign(p, p + contig.numel());
+  }
+#else
+  LOG_WARNING("RuntimeCacheHandle::deserialize() invoked on a non-RTX build; bytes ignored.");
+#endif
+}
+
+bool RuntimeCacheHandle::has_cache() const {
+#ifdef TRT_MAJOR_RTX
+  std::lock_guard<std::mutex> lock(state_mu_);
+  return trt_handle_ != nullptr;
+#else
+  return false;
+#endif
+}
+
+#ifdef TRT_MAJOR_RTX
+std::shared_ptr<nvinfer1::IRuntimeCache> RuntimeCacheHandle::ensure_materialized(nvinfer1::IRuntimeConfig* config) {
+  std::lock_guard<std::mutex> lock(state_mu_);
+  if (!trt_handle_) {
+    trt_handle_ = make_trt(config->createRuntimeCache());
+    if (!trt_handle_) {
+      return nullptr;
+    }
+    // Drain any bytes that ``deserialize`` stashed pre-materialization.
+    // This is the cpp-rt warm-start path: ``load()`` fired before the first
+    // ``ensure_materialized``, bytes parked in ``pending_warm_bytes_``,
+    // first engine to ``ensure_materialized`` creates the cache and drains.
+    if (!std::empty(pending_warm_bytes_)) {
+      trt_handle_->deserialize(pending_warm_bytes_.data(), std::size(pending_warm_bytes_));
+      pending_warm_bytes_.clear();
+      pending_warm_bytes_.shrink_to_fit();
+      LOG_DEBUG("Drained pending warm-start bytes into IRuntimeCache.");
+    }
+  }
+  return trt_handle_;
+}
+#endif
+
+// ---- RuntimeSettings methods ------------------------------------------------
+
+bool RuntimeSettings::operator==(RuntimeSettings const& other) const noexcept {
+  // ``runtime_cache`` compares by pointer identity: passing the same handle
+  // twice through the settings setter is a no-op. Hoisted into locals because
+  // ``std::tie`` requires lvalues.
+  auto* this_cache = runtime_cache.get();
+  auto* other_cache = other.runtime_cache.get();
+  return std::tie(dynamic_shapes_kernel_specialization_strategy, cuda_graph_strategy, this_cache) ==
+      std::tie(other.dynamic_shapes_kernel_specialization_strategy, other.cuda_graph_strategy, other_cache);
+}
+
+std::string RuntimeSettings::to_str() const {
+  std::ostringstream os;
+  os << "RuntimeSettings{" << std::endl;
+  os << "  Dynamic Shapes Kernel Strategy: " << dynamic_shapes_kernel_specialization_strategy << std::endl;
+  os << "  CUDA Graph Strategy: " << cuda_graph_strategy << std::endl;
+  if (runtime_cache) {
+    auto const& p = runtime_cache->path;
+    os << "  Runtime Cache: " << (p.empty() ? "<in-memory shared>" : p) << std::endl;
+  } else {
+    os << "  Runtime Cache: <engine-local, in-memory>" << std::endl;
+  }
+  os << "}";
+  return os.str();
+}
+
+std::ostream& operator<<(std::ostream& os, RuntimeSettings const& rs) {
+  os << rs.to_str();
+  return os;
+}
+
+} // namespace runtime
+} // namespace core
+} // namespace torch_tensorrt