74 fix context transport primitives for the gpu

.devcontainer/cpu/Dockerfile

@@ -15,6 +15,29 @@ FROM iowarp/deps-cpu:latest
 # - MPI (OpenMPI)
 # - libaio (for bdev ChiMod)
 
+# Remap iowarp user UID/GID to match the host user.
+# This avoids file permission issues with bind-mounted volumes.
+# Override at build time: --build-arg HOST_UID=$(id -u) --build-arg HOST_GID=$(id -g)
+ARG HOST_UID=1000
+ARG HOST_GID=1000
+
+USER root
+# Ubuntu 24.04 ships a default "ubuntu" user at UID 1000 which blocks
+# updateRemoteUserUID and manual UID remapping (see
+# https://github.com/microsoft/vscode-remote-release/issues/10030).
+# Move it out of the way so iowarp can claim the host user's UID.
+RUN if id ubuntu >/dev/null 2>&1; then \
+      usermod -u 59999 ubuntu && \
+      groupmod -g 59999 ubuntu; \
+    fi && \
+    OLD_UID=$(id -u iowarp) && OLD_GID=$(id -g iowarp) && \
+    if [ "${HOST_UID}" != "${OLD_UID}" ] || [ "${HOST_GID}" != "${OLD_GID}" ]; then \
+      groupmod -o -g "${HOST_GID}" iowarp && \
+      usermod  -o -u "${HOST_UID}" -g "${HOST_GID}" iowarp && \
+      chown -R "${HOST_UID}:${HOST_GID}" /home/iowarp; \
+    fi
+
+USER iowarp
 WORKDIR /workspace
 
 # Install Claude Code for AI-assisted development

.devcontainer/cpu/devcontainer.json

@@ -3,6 +3,10 @@
   "build": {
     "dockerfile": "Dockerfile",
     "context": "../..",
+    "args": {
+      "HOST_UID": "${localEnv:HOST_UID:1000}",
+      "HOST_GID": "${localEnv:HOST_GID:1000}"
+    },
     "options": [
       "--tag=iowarp/core-devcontainer:latest"
     ]
@@ -26,6 +30,7 @@
     "--privileged",
     "--shm-size=2gb"
   ],
+  "updateRemoteUserUID": true,
   "initializeCommand": "bash -c 'mkdir -p ~/.ssh ~/.claude && chmod 700 ~/.ssh && touch ~/.claude.json'",
   "customizations": {
     "vscode": {

.devcontainer/nvidia-gpu/Dockerfile

@@ -20,6 +20,29 @@ FROM iowarp/deps-nvidia:latest
 # - NVIDIA Container Toolkit
 # - GPU environment variables (CUDA_HOME, NVIDIA_VISIBLE_DEVICES, etc.)
 
+# Remap iowarp user UID/GID to match the host user.
+# This avoids file permission issues with bind-mounted volumes.
+# Override at build time: --build-arg HOST_UID=$(id -u) --build-arg HOST_GID=$(id -g)
+ARG HOST_UID=1000
+ARG HOST_GID=1000
+
+USER root
+# Ubuntu 24.04 ships a default "ubuntu" user at UID 1000 which blocks
+# updateRemoteUserUID and manual UID remapping (see
+# https://github.com/microsoft/vscode-remote-release/issues/10030).
+# Move it out of the way so iowarp can claim the host user's UID.
+RUN if id ubuntu >/dev/null 2>&1; then \
+      usermod -u 59999 ubuntu && \
+      groupmod -g 59999 ubuntu; \
+    fi && \
+    OLD_UID=$(id -u iowarp) && OLD_GID=$(id -g iowarp) && \
+    if [ "${HOST_UID}" != "${OLD_UID}" ] || [ "${HOST_GID}" != "${OLD_GID}" ]; then \
+      groupmod -o -g "${HOST_GID}" iowarp && \
+      usermod  -o -u "${HOST_UID}" -g "${HOST_GID}" iowarp && \
+      chown -R "${HOST_UID}:${HOST_GID}" /home/iowarp; \
+    fi
+
+USER iowarp
 WORKDIR /workspace
 
 # Install Claude Code for AI-assisted development

.devcontainer/nvidia-gpu/devcontainer.json

@@ -3,6 +3,10 @@
     "build": {
         "dockerfile": "Dockerfile",
         "context": "../..",
+        "args": {
+            "HOST_UID": "${localEnv:HOST_UID:1000}",
+            "HOST_GID": "${localEnv:HOST_GID:1000}"
+        },
         "options": [
             "--tag=iowarp/core-devcontainer:latest"
         ]
@@ -31,6 +35,7 @@
         "--shm-size=2gb",
         "--gpus=all"
     ],
+    "updateRemoteUserUID": true,
     "initializeCommand": "bash -c 'umask 077 && mkdir -p ~/.ssh ~/.claude && chmod 700 ~/.ssh && touch ~/.claude.json'",
     // NOTE: If container fails to start with GPU error, run on host:
     //   sudo apt-get install -y nvidia-container-toolkit

AGENTS.md

@@ -784,6 +784,7 @@ environment:
   - CHI_CLIENT_DATA_SEGMENT_SIZE=512M
   - CHI_RUNTIME_DATA_SEGMENT_SIZE=512M
   - CHI_ZMQ_PORT=5555
+  - CHI_IPC_MODE=TCP          # SHM, TCP (default), or IPC
   - CHI_LOG_LEVEL=info
   - CHI_SHM_SIZE=2147483648
 ```
@@ -812,6 +813,34 @@ environment:
   - CHI_HOSTFILE=/etc/iowarp/hostfile
 ```
 
+## IPC Transport Modes
+
+Chimaera clients communicate with the runtime server using one of three IPC transport modes, controlled by the `CHI_IPC_MODE` environment variable. This variable is read during `IpcManager::ClientInit()`.
+
+**Values:**
+
+| Value | Mode | Description |
+|-------|------|-------------|
+| `SHM` / `shm` | Shared Memory | Client attaches to the server's shared memory queues and pushes tasks directly. Lowest latency, requires same-machine access to the server's shared memory segment. |
+| `TCP` / `tcp` | TCP (ZeroMQ) | Client sends serialized tasks over TCP via lightbeam PUSH/PULL sockets. Works across machines. **This is the default when `CHI_IPC_MODE` is unset.** |
+| `IPC` / `ipc` | Unix Domain Socket (ZeroMQ) | Client sends serialized tasks over a Unix domain socket via lightbeam PUSH/PULL. Same-machine only, avoids TCP overhead. |
+
+**Bulk data handling:**
+- In SHM mode, `bulk()` serialization writes the `ShmPtr` (allocator ID + offset) since both client and server can resolve shared memory pointers.
+- In TCP/IPC mode, buffers are allocated with null `alloc_id_` (private memory). `bulk()` detects null `alloc_id_` and inlines the actual data bytes into the serialization stream.
+
+**Example:**
+```bash
+# Use shared memory transport (same machine, lowest latency)
+export CHI_IPC_MODE=SHM
+
+# Use TCP transport (default, works across machines)
+export CHI_IPC_MODE=TCP
+
+# Use Unix domain socket transport (same machine, no TCP overhead)
+export CHI_IPC_MODE=IPC
+```
+
 ## Python Wheel Distribution
 
 ### Building Bundled Wheels

CMakeLists.txt

@@ -113,7 +113,6 @@ option(WRP_CORE_ENABLE_JARVIS "Enable Jarvis CI infrastructure installation" OFF
 #------------------------------------------------------------------------------
 # HermesShm (context-transport-primitives) Options
 #------------------------------------------------------------------------------
-option(HSHM_ENABLE_TESTS "Enable tests for HermesShm" ON)
 option(HSHM_ENABLE_PTHREADS "Support spawning pthreads" OFF)
 option(HSHM_ENABLE_WINDOWS_THREADS "Support spawning windows threads" OFF)
 option(HSHM_DEBUG_LOCK "Used for debugging locks" OFF)
@@ -123,7 +122,6 @@ set(HSHM_LOG_LEVEL "1" CACHE STRING "Log level threshold (0=Debug, 1=Info, 2=War
 #------------------------------------------------------------------------------
 # Chimaera (context-runtime) Options
 #------------------------------------------------------------------------------
-option(CHIMAERA_ENABLE_TESTS "Enable tests for Chimaera runtime" ON)
 
 #------------------------------------------------------------------------------
 # CTE (context-transfer-engine) Options
@@ -155,11 +153,7 @@ option(WRP_CORE_ENABLE_GRAY_SCOTT "Enable Gray-Scott ADIOS2 example (requires AD
 # If WRP_CORE_ENABLE_BENCHMARKS is OFF, force all component benchmarks OFF
 # Otherwise, use individual component values
 
-# Apply master test switch
-if(NOT WRP_CORE_ENABLE_TESTS)
-    set(HSHM_ENABLE_TESTS OFF)
-    set(CHIMAERA_ENABLE_TESTS OFF)
-endif()
+# Apply master test switch (no-op, WRP_CORE_ENABLE_TESTS used directly)
 
 # Set HSHM_ENABLE_* aliases for backward compatibility
 # These allow component code to continue using HSHM_ENABLE_* while we transition
@@ -645,8 +639,11 @@ endif()
 # Add compiler flags following Google C++ style guide
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
-# Disable some problematic warnings for external dependencies
+# Disable warnings that are false positives or from external dependencies
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-parameter -Wno-unused-variable -Wno-reorder")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-pedantic -Wno-sign-compare -Wno-missing-field-initializers")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-but-set-variable -Wno-unused-function -Wno-cast-function-type")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-self-move -Wno-format")
 
 # Debug configuration
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g -O0 -DDEBUG")

CMakePresets.json

@@ -40,17 +40,17 @@
             "binaryDir": "${sourceDir}/build",
             "cacheVariables": {
                 "CMAKE_BUILD_TYPE": "Debug",
-                "WRP_CORE_ENABLE_RUNTIME": "OFF",
-                "WRP_CORE_ENABLE_CTE": "OFF",
+                "WRP_CORE_ENABLE_RUNTIME": "ON",
+                "WRP_CORE_ENABLE_CTE": "ON",
                 "WRP_CORE_ENABLE_CAE": "OFF",
                 "WRP_CORE_ENABLE_CEE": "OFF",
                 "WRP_CORE_ENABLE_TESTS": "ON",
                 "WRP_CORE_ENABLE_BENCHMARKS": "ON",
-                "WRP_CORE_ENABLE_ELF": "ON",
+                "WRP_CORE_ENABLE_ELF": "OFF",
                 "WRP_CORE_ENABLE_CUDA": "ON",
                 "CMAKE_CUDA_ARCHITECTURES": "86",
                 "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
-                "WRP_CORE_ENABLE_ASAN": "ON"
+                "WRP_CORE_ENABLE_ASAN": "OFF"
             }
         },
         {
@@ -91,6 +91,7 @@
                 "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
                 "WRP_CORE_ENABLE_ASAN": "OFF",
                 "WRP_CORE_ENABLE_PYTHON": "ON",
+                "WRP_CORE_ENABLE_COVERAGE": "OFF",
                 "HSHM_LOG_LEVEL": "1"
             }
         },

cmake/IowarpCoreCommon.cmake

@@ -46,6 +46,7 @@ macro(wrp_core_enable_cuda CXX_STANDARD)
 
     message(STATUS "USING CUDA ARCH: ${CMAKE_CUDA_ARCHITECTURES}")
     set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} --forward-unknown-to-host-compiler -diag-suppress=177,20014,20011,20012")
+    set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -Xcompiler=-Wno-format,-Wno-pedantic,-Wno-sign-compare,-Wno-unused-but-set-variable")
     enable_language(CUDA)
 
     set(CMAKE_CUDA_USE_RESPONSE_FILE_FOR_INCLUDES 0)