diff --git a/src/benchmark/chronometer.h b/src/benchmark/chronometer.h
index 97b7c18..45ab9cd 100644
--- a/src/benchmark/chronometer.h
+++ b/src/benchmark/chronometer.h
@@ -49,6 +49,7 @@ template <typename P> class InterimResult
 public:
     InterimResult(const std::uint64_t operation_count, const P &phase, const std::uint16_t iteration,
                   const std::uint16_t core_count, const std::chrono::milliseconds time,
+                  const std::array<std::uint16_t,mx::tasking::config::max_cores()> &affinities,
                   std::vector<PerfCounter> &counter, std::unordered_map<std::uint16_t, std::uint64_t> executed_tasks,
                   std::unordered_map<std::uint16_t, std::uint64_t> executed_reader_tasks,
                   std::unordered_map<std::uint16_t, std::uint64_t> executed_writer_tasks,
@@ -56,7 +57,7 @@ public:
                   std::unordered_map<std::uint16_t, std::uint64_t> scheduled_tasks_on_core,
                   std::unordered_map<std::uint16_t, std::uint64_t> scheduled_tasks_off_core,
                   std::unordered_map<std::uint16_t, std::uint64_t> worker_fills)
-        : _operation_count(operation_count), _phase(phase), _iteration(iteration), _core_count(core_count), _time(time),
+        : _operation_count(operation_count), _phase(phase), _iteration(iteration), _core_count(core_count), _time(time), _affinities(affinities),
           _executed_tasks(std::move(executed_tasks)), _executed_reader_tasks(std::move(executed_reader_tasks)),
           _executed_writer_tasks(std::move(executed_writer_tasks)), _scheduled_tasks(std::move(scheduled_tasks)),
           _scheduled_tasks_on_core(std::move(scheduled_tasks_on_core)),
@@ -75,6 +76,7 @@ public:
     std::uint16_t iteration() const noexcept { return _iteration; }
     std::uint16_t core_count() const noexcept { return _core_count; }
     std::chrono::milliseconds time() const noexcept { return _time; }
+    const std::array<std::uint16_t,mx::tasking::config::max_cores()> &affinities() const noexcept { return _affinities; }
     double throughput() const { return _operation_count / (_time.count() / 1000.0); }
     const std::vector<std::pair<std::string, double>> &performance_counter() const noexcept
     {
@@ -122,6 +124,7 @@ public:
         json["cores"] = core_count();
         json["phase"] = phase();
         json["throughput"] = throughput();
+        json["affinities"] = affinities();
         for (const auto &[name, value] : performance_counter())
         {
             json[name] = value / double(operation_count());
@@ -145,6 +148,7 @@ private:
     const std::uint16_t _iteration;
     const std::uint16_t _core_count;
     const std::chrono::milliseconds _time;
+    const std::array<std::uint16_t,mx::tasking::config::max_cores()> &_affinities;
     std::vector<std::pair<std::string, double>> _performance_counter;
     const std::unordered_map<std::uint16_t, std::uint64_t> _executed_tasks;
     const std::unordered_map<std::uint16_t, std::uint64_t> _executed_reader_tasks;
@@ -194,6 +198,7 @@ public:
                 _current_iteration,
                 _core_set.size(),
                 milliseconds,
+                mx::tasking::runtime::worker_affinities(),
                 _perf.counter(),
                 statistic_map(mx::tasking::profiling::Statistic::Executed),
                 statistic_map(mx::tasking::profiling::Statistic::ExecutedReader),
diff --git a/src/mx/tasking/worker.cpp b/src/mx/tasking/worker.cpp
index 0b3e7eb..195614d 100644
--- a/src/mx/tasking/worker.cpp
+++ b/src/mx/tasking/worker.cpp
@@ -6,16 +6,17 @@
 #include <mx/system/builtin.h>
 #include <mx/system/topology.h>
 #include <mx/util/random.h>
+#include <iostream>
 
 using namespace mx::tasking;
 
 Worker::Worker(const std::uint16_t id, const std::uint16_t target_core_id, const std::uint16_t target_numa_node_id,
                const util::maybe_atomic<bool> &is_running, const std::uint16_t prefetch_distance,
                memory::reclamation::LocalEpoch &local_epoch,
-               const std::atomic<memory::reclamation::epoch_t> &global_epoch, profiling::Statistic &statistic) noexcept
+               const std::atomic<memory::reclamation::epoch_t> &global_epoch, profiling::Statistic &statistic, synchronization::Spinlock &cout_lock) noexcept
     : _target_core_id(target_core_id), _prefetch_distance(prefetch_distance),
       _channel(id, target_numa_node_id, prefetch_distance), _local_epoch(local_epoch), _global_epoch(global_epoch),
-      _statistic(statistic), _is_running(is_running)
+      _statistic(statistic), _is_running(is_running), _cout_lock(cout_lock)
 {
 }
 
@@ -32,8 +33,15 @@ void Worker::execute()
     //assert(this->_target_core_id == core_id && "Worker not pinned to correct core.");
     const auto channel_id = this->_channel.id();
 
-    while (this->_is_running)
+    _phys_core_id = static_cast<std::uint16_t>(sched_getcpu());
+
+    while (true)
     {
+        while (this->_is_running == false)
+        {
+            system::builtin::pause();
+        }
+    
         if constexpr (config::memory_reclamation() == config::UpdateEpochPeriodically)
         {
             this->_local_epoch.enter(this->_global_epoch);
diff --git a/src/mx/tasking/worker.h b/src/mx/tasking/worker.h
index 1854357..68d917f 100644
--- a/src/mx/tasking/worker.h
+++ b/src/mx/tasking/worker.h
@@ -12,6 +12,7 @@
 #include <mx/util/maybe_atomic.h>
 #include <variant>
 #include <vector>
+#include <mx/synchronization/spinlock.h>
 
 namespace mx::tasking {
 /**
@@ -23,7 +24,7 @@ public:
     Worker(std::uint16_t id, std::uint16_t target_core_id, std::uint16_t target_numa_node_id,
            const util::maybe_atomic<bool> &is_running, std::uint16_t prefetch_distance,
            memory::reclamation::LocalEpoch &local_epoch, const std::atomic<memory::reclamation::epoch_t> &global_epoch,
-           profiling::Statistic &statistic) noexcept;
+           profiling::Statistic &statistic, synchronization::Spinlock &cout_lock) noexcept;
 
     ~Worker() noexcept = default;
 
@@ -40,10 +41,16 @@ public:
     [[nodiscard]] Channel &channel() noexcept { return _channel; }
     [[nodiscard]] const Channel &channel() const noexcept { return _channel; }
 
+    [[nodiscard]] const std::uint16_t phys_core_id() const noexcept { return _phys_core_id; }
+
 private:
     // Id of the logical core.
     const std::uint16_t _target_core_id;
 
+    std::uint16_t _phys_core_id{0};
+
+    synchronization::Spinlock &_cout_lock;
+
     // Distance of prefetching tasks.
     const std::uint16_t _prefetch_distance;