Merge pull request #960 from vinser52/svinogra_ipc_api

Update umfOpenIPCHandle API to use IPC handler instead of pool

examples/ipc_ipcapi/ipc_ipcapi_consumer.c

@@ -142,6 +142,13 @@ int main(int argc, char *argv[]) {
         goto err_destroy_OS_memory_provider;
     }
 
+    umf_ipc_handler_handle_t ipc_handler;
+    umf_result = umfPoolGetIPCHandler(scalable_pool, &ipc_handler);
+    if (umf_result != UMF_RESULT_SUCCESS) {
+        fprintf(stderr, "[producer] ERROR: get IPC handler failed\n");
+        goto err_destroy_scalable_pool;
+    }
+
     // connect to the producer
     producer_socket = consumer_connect_to_producer(port);
     if (producer_socket < 0) {
@@ -209,7 +216,7 @@ int main(int argc, char *argv[]) {
         len);
 
     void *SHM_ptr;
-    umf_result = umfOpenIPCHandle(scalable_pool, IPC_handle, &SHM_ptr);
+    umf_result = umfOpenIPCHandle(ipc_handler, IPC_handle, &SHM_ptr);
     if (umf_result == UMF_RESULT_ERROR_NOT_SUPPORTED) {
         fprintf(stderr,
                 "[consumer] SKIP: opening the IPC handle is not supported\n");

examples/ipc_level_zero/ipc_level_zero.c

@@ -180,14 +180,21 @@ int main(void) {
 
     fprintf(stdout, "Consumer pool created.\n");
 
+    umf_ipc_handler_handle_t ipc_handler = 0;
+    umf_result = umfPoolGetIPCHandler(consumer_pool, &ipc_handler);
+    if (umf_result != UMF_RESULT_SUCCESS) {
+        fprintf(stderr, "ERROR: Failed to get IPC handler!\n");
+        return -1;
+    }
+
     void *mapped_buf = NULL;
-    umf_result = umfOpenIPCHandle(consumer_pool, ipc_handle, &mapped_buf);
+    umf_result = umfOpenIPCHandle(ipc_handler, ipc_handle, &mapped_buf);
     if (umf_result != UMF_RESULT_SUCCESS) {
         fprintf(stderr, "ERROR: Failed to open IPC handle!\n");
         return -1;
     }
 
-    fprintf(stdout, "IPC handle opened in the consumer pool.\n");
+    fprintf(stdout, "IPC handle opened.\n");
 
     size_t *tmp_buf = malloc(BUFFER_SIZE);
     ret = level_zero_copy(consumer_context, device, tmp_buf, mapped_buf,

include/umf/ipc.h

@@ -19,6 +19,8 @@ extern "C" {
 
 typedef struct umf_ipc_data_t *umf_ipc_handle_t;
 
+typedef void *umf_ipc_handler_handle_t;
+
 ///
 /// @brief Returns the size of IPC handles for the specified pool.
 /// @param hPool [in] Pool handle
@@ -44,11 +46,11 @@ umf_result_t umfPutIPCHandle(umf_ipc_handle_t ipcHandle);
 
 ///
 /// @brief Open IPC handle retrieved by umfGetIPCHandle.
-/// @param hPool [in] Pool handle where to open the the IPC handle.
+/// @param hIPCHandler [in] IPC Handler handle used to open the IPC handle.
 /// @param ipcHandle [in] IPC handle.
 /// @param ptr [out] pointer to the memory in the current process.
 /// @return UMF_RESULT_SUCCESS on success or appropriate error code on failure.
-umf_result_t umfOpenIPCHandle(umf_memory_pool_handle_t hPool,
+umf_result_t umfOpenIPCHandle(umf_ipc_handler_handle_t hIPCHandler,
                               umf_ipc_handle_t ipcHandle, void **ptr);
 
 ///
@@ -57,6 +59,13 @@ umf_result_t umfOpenIPCHandle(umf_memory_pool_handle_t hPool,
 /// @return UMF_RESULT_SUCCESS on success or appropriate error code on failure.
 umf_result_t umfCloseIPCHandle(void *ptr);
 
+/// @brief Get handle to the IPC handler from existing pool.
+/// @param hPool [in] Pool handle
+/// @param hIPCHandler [out] handle to the IPC handler
+/// @return UMF_RESULT_SUCCESS on success or appropriate error code on failure.
+umf_result_t umfPoolGetIPCHandler(umf_memory_pool_handle_t hPool,
+                                  umf_ipc_handler_handle_t *hIPCHandler);
+
 #ifdef __cplusplus
 }
 #endif

scripts/docs_config/examples.rst

@@ -194,12 +194,15 @@ to another process it can be opened by the :any:`umfOpenIPCHandle` function.
 
 .. code-block:: c
 
+    umf_ipc_handler_handle_t ipc_handler = 0;
+    umf_result = umfPoolGetIPCHandler(consumer_pool, &ipc_handler);
+
     void *mapped_buf = NULL;
-    umf_result = umfOpenIPCHandle(consumer_pool, ipc_handle, &mapped_buf);
+    umf_result = umfOpenIPCHandle(ipc_handler, ipc_handle, &mapped_buf);
 
-The :any:`umfOpenIPCHandle` function requires the memory pool handle and the IPC handle as input parameters. It maps
+The :any:`umfOpenIPCHandle` function requires the IPC handler and the IPC handle as input parameters. The IPC handler maps
 the handle to the current process address space and returns the pointer to the same memory region that was allocated
-in the producer process.
+in the producer process. To retrieve the IPC handler, the :any:`umfPoolGetIPCHandler` function is used.
 
 .. note::
     The virtual addresses of the memory region referred to by the IPC handle may not be the same in the producer and consumer processes.

src/ipc.c

@@ -119,12 +119,18 @@ umf_result_t umfPutIPCHandle(umf_ipc_handle_t umfIPCHandle) {
     return ret;
 }
 
-umf_result_t umfOpenIPCHandle(umf_memory_pool_handle_t hPool,
+umf_result_t umfOpenIPCHandle(umf_ipc_handler_handle_t hIPCHandler,
                               umf_ipc_handle_t umfIPCHandle, void **ptr) {
 
-    // We cannot use umfPoolGetMemoryProvider function because it returns
-    // upstream provider but we need tracking one
-    umf_memory_provider_handle_t hProvider = hPool->provider;
+    // IPC handler is an instance of tracking memory provider
+    if (*(uint32_t *)hIPCHandler != UMF_VERSION_CURRENT) {
+        // It is a temporary hack to verify that user passes correct IPC handler,
+        // not a pool handle, as it was required in previous version.
+        LOG_ERR("Invalid IPC handler.");
+        return UMF_RESULT_ERROR_INVALID_ARGUMENT;
+    }
+
+    umf_memory_provider_handle_t hProvider = hIPCHandler;
     void *base = NULL;
 
     umf_result_t ret = umfMemoryProviderOpenIPCHandle(
@@ -153,3 +159,26 @@ umf_result_t umfCloseIPCHandle(void *ptr) {
     return umfMemoryProviderCloseIPCHandle(hProvider, allocInfo.base,
                                            allocInfo.baseSize);
 }
+
+umf_result_t umfPoolGetIPCHandler(umf_memory_pool_handle_t hPool,
+                                  umf_ipc_handler_handle_t *hIPCHandler) {
+    if (hPool == NULL) {
+        LOG_ERR("Pool handle is NULL.");
+        return UMF_RESULT_ERROR_INVALID_ARGUMENT;
+    }
+
+    if (hIPCHandler == NULL) {
+        LOG_ERR("hIPCHandler is NULL.");
+        return UMF_RESULT_ERROR_INVALID_ARGUMENT;
+    }
+
+    // We cannot use umfPoolGetMemoryProvider function because it returns
+    // upstream provider but we need tracking one
+    umf_memory_provider_handle_t hProvider = hPool->provider;
+
+    // We are using tracking provider as an IPC handler because
+    // it is doing IPC caching.
+    *hIPCHandler = (umf_ipc_handler_handle_t)hProvider;
+
+    return UMF_RESULT_SUCCESS;
+}

src/libumf.def

@@ -102,6 +102,7 @@ EXPORTS
     umfPoolCreateFromMemspace
     umfPoolDestroy
     umfPoolFree
+    umfPoolGetIPCHandler
     umfPoolGetIPCHandleSize
     umfPoolGetLastAllocationError
     umfPoolGetMemoryProvider

src/libumf.map

@@ -96,6 +96,7 @@ UMF_1.0 {
         umfPoolCreateFromMemspace;
         umfPoolDestroy;
         umfPoolFree;
+        umfPoolGetIPCHandler;
         umfPoolGetIPCHandleSize;
         umfPoolGetLastAllocationError;
         umfPoolGetMemoryProvider;

test/common/ipc_common.c

@@ -138,6 +138,13 @@ int run_consumer(int port, umf_memory_pool_ops_t *pool_ops, void *pool_params,
         goto err_umfMemoryProviderDestroy;
     }
 
+    umf_ipc_handler_handle_t ipc_handler;
+    umf_result = umfPoolGetIPCHandler(pool, &ipc_handler);
+    if (umf_result != UMF_RESULT_SUCCESS) {
+        fprintf(stderr, "[consumer] ERROR: get IPC handler failed\n");
+        goto err_umfMemoryPoolDestroy;
+    }
+
     producer_socket = consumer_connect(port);
     if (producer_socket < 0) {
         goto err_umfMemoryPoolDestroy;
@@ -195,7 +202,7 @@ int run_consumer(int port, umf_memory_pool_ops_t *pool_ops, void *pool_params,
         len);
 
     void *SHM_ptr;
-    umf_result = umfOpenIPCHandle(pool, IPC_handle, &SHM_ptr);
+    umf_result = umfOpenIPCHandle(ipc_handler, IPC_handle, &SHM_ptr);
     if (umf_result == UMF_RESULT_ERROR_NOT_SUPPORTED) {
         fprintf(stderr,
                 "[consumer] SKIP: opening the IPC handle is not supported\n");

test/ipcFixtures.hpp

@@ -207,12 +207,17 @@ TEST_P(umfIpcTest, BasicFlow) {
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
     ASSERT_EQ(handleFullSize, handleHalfSize);
 
+    umf_ipc_handler_handle_t ipcHandler = nullptr;
+    ret = umfPoolGetIPCHandler(pool.get(), &ipcHandler);
+    ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
+    ASSERT_NE(ipcHandler, nullptr);
+
     void *fullArray = nullptr;
-    ret = umfOpenIPCHandle(pool.get(), ipcHandleFull, &fullArray);
+    ret = umfOpenIPCHandle(ipcHandler, ipcHandleFull, &fullArray);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     void *halfArray = nullptr;
-    ret = umfOpenIPCHandle(pool.get(), ipcHandleHalf, &halfArray);
+    ret = umfOpenIPCHandle(ipcHandler, ipcHandleHalf, &halfArray);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     std::vector<int> actual_data(SIZE);
@@ -276,8 +281,13 @@ TEST_P(umfIpcTest, GetPoolByOpenedHandle) {
 
         for (size_t pool_id = 0; pool_id < NUM_POOLS; pool_id++) {
             void *ptr = nullptr;
+            umf_ipc_handler_handle_t ipcHandler = nullptr;
             ret =
-                umfOpenIPCHandle(pools_to_open[pool_id].get(), ipcHandle, &ptr);
+                umfPoolGetIPCHandler(pools_to_open[pool_id].get(), &ipcHandler);
+            ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
+            ASSERT_NE(ipcHandler, nullptr);
+
+            ret = umfOpenIPCHandle(ipcHandler, ipcHandle, &ptr);
             ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
             openedPtrs[pool_id][i] = ptr;
         }
@@ -311,16 +321,22 @@ TEST_P(umfIpcTest, GetPoolByOpenedHandle) {
 TEST_P(umfIpcTest, AllocFreeAllocTest) {
     constexpr size_t SIZE = 64 * 1024;
     umf::pool_unique_handle_t pool = makePool();
+    umf_ipc_handler_handle_t ipcHandler = nullptr;
+
+    umf_result_t ret = umfPoolGetIPCHandler(pool.get(), &ipcHandler);
+    ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
+    ASSERT_NE(ipcHandler, nullptr);
+
     void *ptr = umfPoolMalloc(pool.get(), SIZE);
     EXPECT_NE(ptr, nullptr);
 
     umf_ipc_handle_t ipcHandle = nullptr;
     size_t handleSize = 0;
-    umf_result_t ret = umfGetIPCHandle(ptr, &ipcHandle, &handleSize);
+    ret = umfGetIPCHandle(ptr, &ipcHandle, &handleSize);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     void *opened_ptr = nullptr;
-    ret = umfOpenIPCHandle(pool.get(), ipcHandle, &opened_ptr);
+    ret = umfOpenIPCHandle(ipcHandler, ipcHandle, &opened_ptr);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     ret = umfCloseIPCHandle(opened_ptr);
@@ -343,7 +359,7 @@ TEST_P(umfIpcTest, AllocFreeAllocTest) {
     ret = umfGetIPCHandle(ptr, &ipcHandle, &handleSize);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
-    ret = umfOpenIPCHandle(pool.get(), ipcHandle, &opened_ptr);
+    ret = umfOpenIPCHandle(ipcHandler, ipcHandle, &opened_ptr);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     ret = umfCloseIPCHandle(opened_ptr);
@@ -362,11 +378,22 @@ TEST_P(umfIpcTest, AllocFreeAllocTest) {
     EXPECT_EQ(stat.openCount, stat.closeCount);
 }
 
-TEST_P(umfIpcTest, openInTwoPools) {
+TEST_P(umfIpcTest, openInTwoIpcHandlers) {
     constexpr size_t SIZE = 100;
     std::vector<int> expected_data(SIZE);
     umf::pool_unique_handle_t pool1 = makePool();
     umf::pool_unique_handle_t pool2 = makePool();
+    umf_ipc_handler_handle_t ipcHandler1 = nullptr;
+    umf_ipc_handler_handle_t ipcHandler2 = nullptr;
+
+    umf_result_t ret = umfPoolGetIPCHandler(pool1.get(), &ipcHandler1);
+    ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
+    ASSERT_NE(ipcHandler1, nullptr);
+
+    ret = umfPoolGetIPCHandler(pool2.get(), &ipcHandler2);
+    ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
+    ASSERT_NE(ipcHandler2, nullptr);
+
     void *ptr = umfPoolMalloc(pool1.get(), sizeof(expected_data[0]) * SIZE);
     EXPECT_NE(ptr, nullptr);
 
@@ -375,15 +402,15 @@ TEST_P(umfIpcTest, openInTwoPools) {
 
     umf_ipc_handle_t ipcHandle = nullptr;
     size_t handleSize = 0;
-    umf_result_t ret = umfGetIPCHandle(ptr, &ipcHandle, &handleSize);
+    ret = umfGetIPCHandle(ptr, &ipcHandle, &handleSize);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     void *openedPtr1 = nullptr;
-    ret = umfOpenIPCHandle(pool1.get(), ipcHandle, &openedPtr1);
+    ret = umfOpenIPCHandle(ipcHandler1, ipcHandle, &openedPtr1);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     void *openedPtr2 = nullptr;
-    ret = umfOpenIPCHandle(pool2.get(), ipcHandle, &openedPtr2);
+    ret = umfOpenIPCHandle(ipcHandler2, ipcHandle, &openedPtr2);
     ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
 
     ret = umfPutIPCHandle(ipcHandle);
@@ -466,6 +493,7 @@ TEST_P(umfIpcTest, ConcurrentGetPutHandles) {
 }
 
 TEST_P(umfIpcTest, ConcurrentOpenCloseHandles) {
+    umf_result_t ret;
     std::vector<void *> ptrs;
     constexpr size_t ALLOC_SIZE = 100;
     constexpr size_t NUM_POINTERS = 100;
@@ -481,21 +509,25 @@ TEST_P(umfIpcTest, ConcurrentOpenCloseHandles) {
     for (size_t i = 0; i < NUM_POINTERS; ++i) {
         umf_ipc_handle_t ipcHandle;
         size_t handleSize;
-        umf_result_t ret = umfGetIPCHandle(ptrs[i], &ipcHandle, &handleSize);
+        ret = umfGetIPCHandle(ptrs[i], &ipcHandle, &handleSize);
         ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
         ipcHandles[i] = ipcHandle;
     }
 
     std::array<std::vector<void *>, NTHREADS> openedIpcHandles;
+    umf_ipc_handler_handle_t ipcHandler = nullptr;
+    ret = umfPoolGetIPCHandler(pool.get(), &ipcHandler);
+    ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
+    ASSERT_NE(ipcHandler, nullptr);
 
     umf_test::syncthreads_barrier syncthreads(NTHREADS);
 
     auto openHandlesFn = [&ipcHandles, &openedIpcHandles, &syncthreads,
-                          &pool](size_t tid) {
+                          ipcHandler](size_t tid) {
         syncthreads();
         for (auto ipcHandle : ipcHandles) {
             void *ptr;
-            umf_result_t ret = umfOpenIPCHandle(pool.get(), ipcHandle, &ptr);
+            umf_result_t ret = umfOpenIPCHandle(ipcHandler, ipcHandle, &ptr);
             ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
             openedIpcHandles[tid].push_back(ptr);
         }
@@ -514,12 +546,12 @@ TEST_P(umfIpcTest, ConcurrentOpenCloseHandles) {
     umf_test::parallel_exec(NTHREADS, closeHandlesFn);
 
     for (auto ipcHandle : ipcHandles) {
-        umf_result_t ret = umfPutIPCHandle(ipcHandle);
+        ret = umfPutIPCHandle(ipcHandle);
         EXPECT_EQ(ret, UMF_RESULT_SUCCESS);
     }
 
     for (void *ptr : ptrs) {
-        umf_result_t ret = umfPoolFree(pool.get(), ptr);
+        ret = umfPoolFree(pool.get(), ptr);
         EXPECT_EQ(ret,
                   get_umf_result_of_free(freeNotSupported, UMF_RESULT_SUCCESS));
     }

test/ipc_negative.cpp

@@ -47,7 +47,11 @@ TEST_F(IpcNotSupported, OpenIPCHandleNotSupported) {
     // This data doesn't matter, as the ipc call is no-op
     std::array<uint8_t, 128> ipc_data = {};
     void *ptr;
-    auto ret = umfOpenIPCHandle(
-        pool, reinterpret_cast<umf_ipc_handle_t>(&ipc_data), &ptr);
+    umf_ipc_handler_handle_t ipc_handler;
+    auto ret = umfPoolGetIPCHandler(pool, &ipc_handler);
+    ASSERT_EQ(ret, UMF_RESULT_SUCCESS);
+
+    ret = umfOpenIPCHandle(ipc_handler,
+                           reinterpret_cast<umf_ipc_handle_t>(&ipc_data), &ptr);
     EXPECT_EQ(ret, UMF_RESULT_ERROR_NOT_SUPPORTED);
 }