Bug4914019 & 4191696: Append pid in shmName for MIG multiple thread scenario

Author: XSShawnZeng

Samples/0_Introduction/simpleIPC/simpleIPC.cu

@@ -99,8 +99,18 @@ static void childProcess(int id)
     std::vector<void *>      ptrs;
     std::vector<cudaEvent_t> events;
     std::vector<char>        verification_buffer(DATA_SIZE);
+    pid_t                    pid;
+    char                     pidString[20] = {0};
+    char                     lshmName[40] = {0};
 
-    if (sharedMemoryOpen(shmName, sizeof(shmStruct), &info) != 0) {
+    pid = getppid();
+    snprintf(pidString, sizeof(pidString), "%d", pid);
+    strcat(lshmName, shmName);
+    strcat(lshmName, pidString);
+
+    printf("CP: lshmName = %s\n", lshmName);
+
+    if (sharedMemoryOpen(lshmName, sizeof(shmStruct), &info) != 0) {
         printf("Failed to create shared memory slab\n");
         exit(EXIT_FAILURE);
     }
@@ -195,10 +205,20 @@ static void parentProcess(char *app)
     std::vector<void *>      ptrs;
     std::vector<cudaEvent_t> events;
     std::vector<Process>     processes;
+    pid_t                    pid;
+    char                     pidString[20] = {0};
+    char                     lshmName[40] = {0};
+
+    pid = getpid();
+    snprintf(pidString, sizeof(pidString), "%d", pid);
+    strcat(lshmName, shmName);
+    strcat(lshmName, pidString);
+
+    printf("PP: lshmName = %s\n", lshmName);
 
     checkCudaErrors(cudaGetDeviceCount(&devCount));
 
-    if (sharedMemoryCreate(shmName, sizeof(*shm), &info) != 0) {
+    if (sharedMemoryCreate(lshmName, sizeof(*shm), &info) != 0) {
         printf("Failed to create shared memory slab\n");
         exit(EXIT_FAILURE);
     }

Samples/2_Concepts_and_Techniques/streamOrderedAllocationIPC/streamOrderedAllocationIPC.cu

@@ -102,13 +102,23 @@ static void childProcess(int id)
     int                 threads = 128;
     cudaDeviceProp      prop;
     std::vector<void *> ptrs;
+    pid_t               pid;
+    char                pidString[20] = {0};
+    char                lshmName[40] = {0};
 
     std::vector<char> verification_buffer(DATA_SIZE);
 
+    pid = getppid();
+    snprintf(pidString, sizeof(pidString), "%d", pid);
+    strcat(lshmName, shmName);
+    strcat(lshmName, pidString);
+
+    printf("CP: lshmName = %s\n", lshmName);
+
     ipcHandle *ipcChildHandle = NULL;
     checkIpcErrors(ipcOpenSocket(ipcChildHandle));
 
-    if (sharedMemoryOpen(shmName, sizeof(shmStruct), &info) != 0) {
+    if (sharedMemoryOpen(lshmName, sizeof(shmStruct), &info) != 0) {
         printf("Failed to create shared memory slab\n");
         exit(EXIT_FAILURE);
     }
@@ -245,14 +255,24 @@ static void parentProcess(char *app)
     std::vector<void *>         ptrs;
     std::vector<Process>        processes;
     cudaMemAllocationHandleType handleType = cudaMemHandleTypeNone;
+    pid_t                       pid;
+    char                        pidString[20] = {0};
+    char                        lshmName[40] = {0};
+
+    pid = getpid();
+    snprintf(pidString, sizeof(pidString), "%d", pid);
+    strcat(lshmName, shmName);
+    strcat(lshmName, pidString);
+
+    printf("PP: lshmName = %s\n", lshmName);
 
     checkCudaErrors(cudaGetDeviceCount(&devCount));
     std::vector<CUdevice> devices(devCount);
     for (i = 0; i < devCount; i++) {
         cuDeviceGet(&devices[i], i);
     }
 
-    if (sharedMemoryCreate(shmName, sizeof(*shm), &info) != 0) {
+    if (sharedMemoryCreate(lshmName, sizeof(*shm), &info) != 0) {
         printf("Failed to create shared memory slab\n");
         exit(EXIT_FAILURE);
     }

Samples/3_CUDA_Features/memMapIPCDrv/memMapIpc.cpp

@@ -310,10 +310,20 @@ static void childProcess(int devId, int id, char **argv)
     ipcHandle          *ipcChildHandle = NULL;
     int                 blocks         = 0;
     int                 threads        = 128;
+    pid_t               pid;
+    char                pidString[20]  = {0};
+    char                lshmName[40]   = {0};
+
+    pid = getppid();
+    snprintf(pidString, sizeof(pidString), "%d", pid);
+    strcat(lshmName, shmName);
+    strcat(lshmName, pidString);
+
+    printf("CP: lshmName = %s\n", lshmName);
 
     checkIpcErrors(ipcOpenSocket(ipcChildHandle));
 
-    if (sharedMemoryOpen(shmName, sizeof(shmStruct), &info) != 0) {
+    if (sharedMemoryOpen(lshmName, sizeof(shmStruct), &info) != 0) {
         printf("Failed to create shared memory slab\n");
         exit(EXIT_FAILURE);
     }
@@ -421,11 +431,20 @@ static void parentProcess(char *app)
     volatile shmStruct  *shm = NULL;
     sharedMemoryInfo     info;
     std::vector<Process> processes;
+    pid_t                pid;
+    char                 pidString[20] = {0};
+    char                 lshmName[40]  = {0};
+
+    pid = getpid();
+    snprintf(pidString, sizeof(pidString), "%d", pid);
+    strcat(lshmName, shmName);
+    strcat(lshmName, pidString);
 
+    printf("PP: lshmName = %s\n", lshmName);
     checkCudaErrors(cuDeviceGetCount(&devCount));
     std::vector<CUdevice> devices(devCount);
 
-    if (sharedMemoryCreate(shmName, sizeof(*shm), &info) != 0) {
+    if (sharedMemoryCreate(lshmName, sizeof(*shm), &info) != 0) {
         printf("Failed to create shared memory slab\n");
         exit(EXIT_FAILURE);
     }