GPU TPC: Add option to clear all non-external-output TPC memory at end of processing

Author: davidrohr

GPU/GPUTracking/Base/GPUReconstructionCPU.cxx

@@ -236,6 +236,9 @@ int32_t GPUReconstructionCPU::RunChains()
         return retVal;
       }
     }
+    if (GetProcessingSettings().tpcFreeAllocatedMemoryAfterProcessing) {
+      ClearAllocatedMemory();
+    }
   }
   mTimerTotal.Stop();
   mStatCPUTime += (double)(std::clock() - cpuTimerStart) / CLOCKS_PER_SEC;

GPU/GPUTracking/Definitions/GPUSettingsList.h

@@ -326,6 +326,7 @@ AddOption(oclPlatformNum, int32_t, -1, "", 0, "Platform to use, in case the back
 AddOption(oclCompileFromSources, bool, false, "", 0, "Compile OpenCL binary from included source code instead of using included spirv code")
 AddOption(oclOverrideSourceBuildFlags, std::string, "", "", 0, "Override OCL build flags for compilation from source, put a space for empty options")
 AddOption(printSettings, bool, false, "", 0, "Print all settings when initializing")
+AddOption(tpcFreeAllocatedMemoryAfterProcessing, bool, false, "", 0, "Clean all memory allocated by TPC when TPC processing done, only data written to external output resources will remain")
 AddVariable(eventDisplay, o2::gpu::GPUDisplayFrontendInterface*, nullptr)
 AddSubConfig(GPUSettingsProcessingRTC, rtc)
 AddSubConfig(GPUSettingsProcessingParam, param)