ITS3: GPU tracking

Signed-off-by: Felix Schlepper <felix.schlepper@cern.ch>

Author: f3sch

Detectors/Upgrades/ITS3/workflow/include/ITS3Workflow/RecoWorkflow.h

@@ -26,6 +26,7 @@ namespace o2::its3::reco_workflow
 framework::WorkflowSpec getWorkflow(bool useMC,
                                     const std::string& trmode,
                                     o2::gpu::GPUDataTypes::DeviceType dtype,
+                                    bool useGPUWorkflow,
                                     bool upstreamDigits,
                                     bool upstreamClusters,
                                     bool disableRootOutput,

Detectors/Upgrades/ITS3/workflow/src/RecoWorkflow.cxx

@@ -15,12 +15,18 @@
 #include "ITSWorkflow/ClusterWriterSpec.h"
 #include "ITSWorkflow/TrackWriterSpec.h"
 #include "ITS3Workflow/DigitReaderSpec.h"
-#include "Framework/Logger.h"
+#include "GPUWorkflow/GPUWorkflowSpec.h"
+#include "Framework/CCDBParamSpec.h"
+
+// Dummy pointers
+using CompletionPolicyData = std::vector<InputSpec>;
+static CompletionPolicyData gPolicyData;
+static std::shared_ptr<o2::gpu::GPURecoWorkflowSpec> gTask;
 
 namespace o2::its3::reco_workflow
 {
 
-framework::WorkflowSpec getWorkflow(bool useMC, const std::string& trmode, o2::gpu::GPUDataTypes::DeviceType dtype,
+framework::WorkflowSpec getWorkflow(bool useMC, const std::string& trmode, o2::gpu::GPUDataTypes::DeviceType dtype, bool useGPUWorkflow,
                                     bool upstreamDigits, bool upstreamClusters, bool disableRootOutput, bool useGeom, int useTrig, bool overrideBeamPosition)
 {
   framework::WorkflowSpec specs;
@@ -38,8 +44,36 @@ framework::WorkflowSpec getWorkflow(bool useMC, const std::string& trmode, o2::g
   }
 
   if (trmode != "off") {
-    specs.emplace_back(o2::its3::getTrackerSpec(useMC, useGeom, useTrig, trmode, overrideBeamPosition, dtype));
+    if (useGPUWorkflow) {
+      o2::gpu::GPURecoWorkflowSpec::Config cfg;
+      cfg.runITSTracking = true;
+      cfg.isITS3 = true;
+      cfg.itsTriggerType = useTrig;
+      cfg.itsOverrBeamEst = overrideBeamPosition;
+      cfg.processMC = useMC;
+      Inputs ggInputs;
+      auto ggRequest = std::make_shared<o2::base::GRPGeomRequest>(false, true, false, true, true,
+                                                                  useGeom ? o2::base::GRPGeomRequest::Aligned : o2::base::GRPGeomRequest::None,
+                                                                  ggInputs, true);
+      if (!useGeom) {
+        ggRequest->addInput({"itsTGeo", "ITS", "GEOMTGEO", 0, Lifetime::Condition, framework::ccdbParamSpec("ITS/Config/Geometry")}, ggInputs);
+      }
+
+      auto task = std::make_shared<o2::gpu::GPURecoWorkflowSpec>(&gPolicyData, cfg, std::vector<int>(), 0, ggRequest);
+      gTask = task;
+      Inputs taskInputs = task->inputs();
+      Options taskOptions = task->options();
+      std::move(ggInputs.begin(), ggInputs.end(), std::back_inserter(taskInputs));
 
+      specs.emplace_back(DataProcessorSpec{
+        "its3-gpu-tracker",
+        taskInputs,
+        task->outputs(),
+        AlgorithmSpec{adoptTask<o2::gpu::GPURecoWorkflowSpec>(task)},
+        taskOptions});
+    } else {
+      specs.emplace_back(o2::its3::getTrackerSpec(useMC, useGeom, useTrig, trmode, overrideBeamPosition, dtype));
+    }
     if (!disableRootOutput) {
       specs.emplace_back(o2::its::getTrackWriterSpec(useMC));
     }

Detectors/Upgrades/ITS3/workflow/src/its3-reco-workflow.cxx

@@ -48,6 +48,7 @@ void customize(std::vector<o2::framework::ConfigParamSpec>& workflowOptions)
     {"tracking-mode", o2::framework::VariantType::String, "off", {"off,sync,async,cosmics"}},
     {"configKeyValues", VariantType::String, "", {"Semicolon separated key=value strings"}},
     {"use-full-geometry", o2::framework::VariantType::Bool, false, {"use full geometry instead of the light-weight IT3 part"}},
+    {"use-gpu-workflow", o2::framework::VariantType::Bool, false, {"use GPU workflow (default: false)"}},
     {"gpu-device", o2::framework::VariantType::Int, 1, {"use gpu device: CPU=1,CUDA=2,HIP=3 (default: CPU)"}}};
   o2::raw::HBFUtilsInitializer::addConfigOption(options);
   std::swap(workflowOptions, options);
@@ -67,6 +68,7 @@ WorkflowSpec defineDataProcessing(ConfigContext const& configcontext)
   auto extClusters = configcontext.options().get<bool>("clusters-from-upstream");
   auto disableRootOutput = configcontext.options().get<bool>("disable-root-output");
   auto useGeom = configcontext.options().get<bool>("use-full-geometry");
+  auto useGPUWfx = configcontext.options().get<bool>("use-gpu-workflow");
   std::transform(trmode.begin(), trmode.end(), trmode.begin(), [](unsigned char c) { return std::tolower(c); });
 
   o2::conf::ConfigurableParam::updateFromString(configcontext.options().get<std::string>("configKeyValues"));
@@ -80,7 +82,7 @@ WorkflowSpec defineDataProcessing(ConfigContext const& configcontext)
       LOG(fatal) << "Unknown trigger type requested for events prescaling: " << selTrig;
     }
   }
-  auto wf = o2::its3::reco_workflow::getWorkflow(useMC, trmode, gpuDevice, extDigits, extClusters, disableRootOutput, useGeom, trType, beamPosOVerride);
+  auto wf = o2::its3::reco_workflow::getWorkflow(useMC, trmode, gpuDevice, useGPUWfx, extDigits, extClusters, disableRootOutput, useGeom, trType, beamPosOVerride);
 
   // configure dpl timer to inject correct firstTForbit: start from the 1st orbit of TF containing 1st sampled orbit
   o2::raw::HBFUtilsInitializer hbfIni(configcontext, wf);