PC sampling: online partial PC sampling decoding (#1004)

* PC sampling: online partial PC sampling decoding

PC sampling service decodes a PC sample partially
by replacing the PC with an id of the loaded code object instance
containing PC and the offset of the PC within that code object instance.

* PC sampling: marker records removed

* PC sampling parser: minor doc update in mock

* PC sampling: introducing rocprofiler_pc_t

* NULL value of the code object id introduced.

* Clarifying documenation related to PC offset.

* PC offset documentation improvement

* PC sampling parser benchmark: Reducing the number of samples to recreate half of performance.

source/lib/rocprofiler-sdk/pc_sampling/parser/tests/benchmark_test.cpp

@@ -35,7 +35,7 @@ static bool
 Benchmark(bool bWarmup)
 {
     constexpr size_t SAMPLE_PER_DISPATCH = 8192;
-    constexpr size_t DISP_PER_QUEUE      = 12;
+    constexpr size_t DISP_PER_QUEUE      = 8;
     constexpr size_t NUM_QUEUES          = MockDoorBell::num_unique_bells;
 
     std::shared_ptr<MockRuntimeBuffer> buffer = std::make_shared<MockRuntimeBuffer>();

source/lib/rocprofiler-sdk/pc_sampling/parser/tests/correlation_id_test.cpp

@@ -53,8 +53,10 @@ alloc_callback(rocprofiler_pc_sampling_record_t** buffer, uint64_t size, void* u
 static bool
 check_samples(rocprofiler_pc_sampling_record_t* samples, uint64_t size)
 {
+    // TODO: replace with (code_obj_id, pc)
     for(size_t i = 0; i < size; i++)
-        if(samples[i].correlation_id.internal != samples[i].pc) return false;
+        if(samples[i].correlation_id.internal != samples[i].pc.loaded_code_object_offset)
+            return false;
     return true;
 }
 

source/lib/rocprofiler-sdk/pc_sampling/parser/tests/gfx9test.cpp

@@ -299,7 +299,10 @@ class WaveIssueAndErrorTest : public WaveSnapTest
     {
         rocprofiler_pc_sampling_record_t sample;
         ::memset(&sample, 0, sizeof(sample));
-        sample.pc                      = dispatch->unique_id;
+        // TODO: Since code objects are not mocked, use pc.loaded_code_object_offset
+        // as the absolute physical address of the mocked PC.
+        sample.pc.loaded_code_object_offset = dispatch->unique_id;
+
         sample.correlation_id.internal = dispatch->getMockId().raw;
 
         sample.flags.valid              = valid && !error;