rocrtst: Limit pool sizes to 2GB on emulator

Individual simple tests such as CPUAccessToGPUMemoryTest are taking
several hours on emulators as the total amount of VRAM keeps increasing.
Limit the pool sizes to 2GB, only on emulator.

Change-Id: I4b33e8549f89413da255731e6748f606ca64a663

rocrtst/common/common.cc

@@ -400,6 +400,12 @@ hsa_status_t AcquirePoolInfo(hsa_amd_memory_pool_t pool,
                                                           &pool_i->size);
   RET_IF_HSA_COMMON_ERR(err);
 
+#ifdef ROCRTST_EMULATOR_BUILD
+  // Limit pool sizes to 2 GB on emulator
+  const size_t max_pool_size = 2*1024*1024*1024UL;
+  pool_i->size = std::min(pool_i->size, max_pool_size);
+#endif
+
   err = hsa_amd_memory_pool_get_info(pool,
              HSA_AMD_MEMORY_POOL_INFO_RUNTIME_ALLOC_ALLOWED,
                                                       &pool_i->alloc_allowed);