Separate agent cache from queue controller (#145)

* Update lib/rocprofiler/agent.{hpp,cpp}

- get_agents() function for internal access to agent pointers

* Update AgentCache

- make member variables and member functions distinguish b/t hsa agent and rocprofiler agent clear

* Change ctor of AgentCache

* Update lib/rocprofiler/hsa/queue_controller.cpp

- QueueController::init uses agent::get_agent_cache

* Update lib/rocprofiler/hsa/agent_cache.*

- member function to get index
- operator== for rocprofiler_agent_t and hsa_agent_t
- removed hsa_iterate_agents from ctor (now in agent.cpp)

* Update lib/rocprofiler/agent.*

- construct_agent_cache function
- functions for rocprofiler agent <-> HSA agent
- functions for getting agent cache

* Update lib/rocprofiler/registration.cpp

- invoke construct_agent_cache when HSA table is receieved

* Update lib/rocprofiler/agent.cpp

- loosen failure conditions
- handle spurious duplicate entry warning

* Update lib/rocprofiler/agent.cpp

- improve read_map diagnostics

* Update lib/rocprofiler/agent.cpp

- avoid infinite loop in read_map

* Update lib/rocprofiler/agent.cpp

- handle empty kfd node properties file

* Update lib/rocprofiler/agent.cpp

- check for permissions to read a node properties file

* Update lib/rocprofiler/agent.cpp

- more checks on file readability

* Update lib/rocprofiler/tests/agent.cpp

- print virtual kfd topology

* Update lib/rocprofiler/tests/agent.cpp

- verify id.handle == hsa_agent internal node id

* Update lib/rocprofiler/tests/agent.cpp

- check node_id
- check location id
- check device id
- update abi test

* Update include/rocprofiler/agent.h

- add node_id field
- add reserved0 field to ensure new field increases struct size

* Update lib/rocprofiler/agent.cpp

- node_id instead of id.handle

* Update lib/rocprofiler/agent_cache.cpp

- node_id instead of id.handle

* Update samples/pc_sampling

- node_id for agent instead of id.handle

* Update lib/rocprofiler/buffer.cpp

- remove debug prints

source/lib/rocprofiler/buffer.cpp

@@ -99,8 +99,6 @@ allocate_buffer()
 rocprofiler_status_t
 flush(rocprofiler_buffer_id_t buffer_id, bool wait)
 {
-    LOG(ERROR) << "flushing...";
-
     if(buffer_id.handle >= get_buffers().size()) return ROCPROFILER_STATUS_ERROR_BUFFER_NOT_FOUND;
 
     auto& buff = get_buffers().at(buffer_id.handle);
@@ -116,7 +114,6 @@ flush(rocprofiler_buffer_id_t buffer_id, bool wait)
     auto idx = buff->buffer_idx++;
 
     auto _task = [buffer_id, idx]() {
-        LOG(ERROR) << "executing task...";
         auto& buff_v          = get_buffers().at(buffer_id.handle);
         auto& buff_internal_v = buff_v->get_internal_buffer(idx);
 
@@ -154,7 +151,6 @@ flush(rocprofiler_buffer_id_t buffer_id, bool wait)
 
     if(task_group)
     {
-        LOG(ERROR) << "executing task...";
         task_group->exec(_task);
         if(wait) task_group->wait();
     }